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19-0396; Rev. 0; 5/95
Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs
_______________General Description
The MAX382/MAX384 are low-voltage, CMOS, 1-of-8 and dual 4-channel muxes with latchable digital inputs. They feature low-voltage operation from a +2.7V to +16.5V single supply and from 3V to 8V dual supplies. Pin compatible with the DG428/DG429, these muxes offer low on-resistance (100 max) matched to within 4 max between channels. Additional features include off leakage less than 2.5nA at +85C and guaranteed low charge injection (10pC max). ESD protection is greater than 2000V per Method 3015.7.
____________________________Features
o Pin-Compatible with Industry-Standard DG428/DG429, DG528/DG529, MAX368/MAX369 o Single-Supply Operation (+2.7V to +16.5V) Bipolar Supply Operation (3V to 8V) o Low Power Consumption (<300W) o Low On-Resistance, 100 max o Guaranteed On-Resistance Match Between Channels, 4 max o Low Leakage, 2.5nA at +85C o TTL/CMOS-Logic Compatible
MAX382/MAX384
________________________Applications
Battery-Operated Systems Audio Signal Routing Low-Voltage Data-Acquisition Systems Sample-and-Hold Circuits Automatic Test Equipment
______________Ordering Information
PART MAX382CPN MAX382CWN MAX382C/D MAX382EPN MAX382EWN MAX382EJN MAX382MJN TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 18 Plastic DIP 18 Wide SO Dice* 18 Plastic DIP 18 Wide SO 18 CERDIP** 18 CERDIP**
Ordering Information continued on last page. * Contact factory for dice specifications. ** Contact factory for package availability.
__________________________________________________________Pin Configurations
TOP VIEW
MAX382
WR 1 A0 2 EN 3 V- 4 N01 5 N02 6 N03 7 N04 8 COM 9 LOGIC 18 RS 17 A1 16 A2 15 GND 14 V+ 13 N05 12 N06 11 N07 10 N08 WR 1 A0 2 EN 3 V- 4 N01A 5 N02A 6 N03A 7 N04A 8 COMA 9
MAX384
18 RS 17 A1 16 GND LOGIC 15 V+ 14 N01B 13 N02B 12 N03B 11 N04B 10 COMB
DIP/SO
DIP/SO
________________________________________________________________ Maxim Integrated Products
1
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Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs MAX382/MAX384
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to GND V+ .......................................................................-0.3V to +17V V- ........................................................................+0.3V to -17V V+ to V-...............................................................-0.3V to +17V Voltage into Any Terminal (Note 1).........(V- - 2V) to (V+ + 2V) or 30mA (whichever occurs first) Current into Any Terminal ...................................................30mA Peak Current, Any Terminal (pulsed at 1ms, 10% duty cycle max) ..........................100mA Continuous Power Dissipation (TA = +70C) Plastic DIP (derate 11.11mW/C above +70C) ..........889mW Wide SO (derate 9.52mW/C above +70C)................762mW CERDIP (derate 10.53mW/C above +70C) ...............842mW Operating Temperature Ranges MAX38_C_ N.......................................................0C to +70C MAX38_E_ N ....................................................-40C to +85C MAX38_MJN ..................................................-55C to +125C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Signals on any terminal exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--Dual Supplies
(V+ = +5V 10%, V- = -5V 10%, GND = 0V, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, WR = 0V, RS = 2.4V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SWITCH Analog Signal Range Channel On-Resistance On-Resistance Matching Between Channels (Note 4) On-Resistance Flatness (Note 5) NO-Off Leakage Current (Note 6) VCOM, VNO (Note 3) RON RON RFLAT(ON) INO = 1mA, VCOM = 3.5V INO = 1mA, VCOM = 3.5V, V+ = 5V, V- = -5V INO = 1mA, VCOM = 3V, V+ = 5V, V- = -5V VNO = 4.5V, VCOM = 4.5V, V+ = 5.5V, V- = -5.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX C, E M C, E M C, E M C, E M C, E M -0.1 -1.0 -10 -0.2 -2.5 -20 -0.1 -1.5 -10 -0.4 -5 -40 -0.2 -2.5 -20 V60 V+ 100 125 4 6 10 13 0.1 1.0 10 0.2 2.5 20 0.1 1.5 10 0.4 5 40 0.2 2.5 20 nA nA nA V SYMBOL CONDITIONS MIN TYP MAX (Note 2) UNITS
INO(OFF)
COM-Off Leakage Current (Note 6)
ICOM(OFF)
TA = +25C VCOM = 4.5V, VNO = 4.5V, MAX382 TA = TMIN V+ = 5.5V, V- = -5.5V to TMAX VCOM = 4.5V, VNO = 4.5V, MAX384 TA = TMIN V+ = 5.5V, V- = -5.5V to TMAX MAX382 TA = TMIN to TMAX TA = +25C MAX384 TA = TMIN to TMAX TA = +25C
TA = +25C COM-On Leakage Current (Note 6) VCOM = 4.5V, VNO = 4.5V,
ICOM(ON)
2
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Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +5V 10%, V- = -5V 10%, GND = 0V, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, WR = 0V, RS = 2.4V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER DIGITAL LOGIC INPUT Logic High Input Voltage Logic Low Input Voltage Input Current with Input Voltage High Input Current with Input Voltage Low SUPPLY Power-Supply Range Positive Supply Current Negative Supply Current AX, EN Data Hold Time Reset Pulse Width DYNAMIC Transition Time Break-Before-Make Interval Enable Turn-On Time Enable Turn-Off Time Write Turn-On Time Reset Turn-Off Time Charge Injection (Note 3) Off Isolation (Note 7) Crosstalk Between Channels Logic Input Capacitance NO-Off Capacitance COM-Off Capacitance COM-On Capacitance tTRANS tOPEN tON(EN) tOFF(EN) tON(WR) tOFF(RS) VCTE VISO VCT CIN CNO(OFF) Figure 1 Figure 2 Figure 3 Figure 3 Figure 4 Figure 6 CL = 100pF, VNO = 0V VEN = 2.4V, f = 100kHz, VGEN = 1Vp-p, RL = 1k f = 1MHz f = 1MHz, VEN = VCOM = 0V MAX382 MAX384 MAX382 MAX384 TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C 2 -75 -92 8 11 40 20 54 34 100 100 80 0 100 20 100 150 250 150 250 150 250 150 250 5 275 ns ns ns ns ns ns pC dB dB pF pF pF pF V+, VI+ ItH tRS VEN = VA = 0V/V+, V+ = 5.5V, V- = -5.5V VEN = VA = 0V/V+, V+ = 5.5V, V- = -5.5V Figure 5 Figure 6, V+ = 5V TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C 2.4 -1 -1 100 100 8 1 1 V A A ns ns VA_H, VENH VA_L, VENL IA_H, IENH IA_L, IENL VA_H = 2.4V, VA_L = 0.8V VA_H = 2.4V, VA_L = 0.8V TA = TMIN to TMAX TA = TMIN to TMAX -0.1 -0.1 2.4 0.8 0.1 0.1 V V A A SYMBOL CONDITIONS MIN TYP MAX (Note 2) UNITS
MAX382/MAX384
VEN = 0V, RL = 1k, f = 100kHz TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C
f = 1MHz, CCOM(OFF) VEN = VCOM = 0V CCOM(ON) f = 1MHz, VEN = VCOM = 0V Figure 5 Figure 5
MINIMUM INPUT TIMING REQUIREMENTS Write Pulse Width AX, EN Data Setup Time tW tS TA = +25C TA = +25C ns ns 3
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Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs MAX382/MAX384
ELECTRICAL CHARACTERISTICS--Single +5V Supply
(V+ = +5V 10%, V- = 0V, GND = 0V, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, WR = 0V, RS = 2.4V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER AX, EN Data Hold Time Reset Pulse Width SWITCH SWITCH Analog Signal Range On-Resistance On-Resistance Matching Between Channels (Note 4) On-Resistance Flatness NO-Off Leakage Current (Note 8) VCOM, VNO (Note 3) RON RON RFLAT INO = 1mA, VCOM = 3.5V, V+ = 4.5V INO = 1mA, VCOM = 3.5V, V+ = 4.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 10 15 -0.1 C, E M C, E M C, E M C, E M C, E M -1.0 -10 -0.2 -2.5 -20 -0.2 -1.5 -10 -0.4 -5 -40 -0.2 -2.5 -20 2.4 0.8 -0.1 -0.1 0.1 0.1 V150 V+ 225 280 10 12 16 20 0.1 1.0 10 0.2 2.5 20 0.2 1.5 10 0.4 5 40 0.2 2.5 20 V V A A nA nA nA V SYMBOL tH tRS Figure 5 Figure 6, V+ = 5V CONDITIONS TA = +25C TA = +25C MIN 100 100 TYP MAX (Note 2) UNITS ns ns
INO = 1mA; VCOM = 3V, 2V, 1V; TA = +25C V+ = 5V TA = TMIN to TMAX VNO = 4.5V, VCOM = 0V, V+ = 5.5V VCOM = 4.5V, VNO = 0V, V+ = 5.5V TA = +25C TA = TMIN to TMAX TA = +25C MAX382 TA = TMIN to TMAX TA = +25C MAX384 TA = TMIN to TMAX TA = +25C MAX382 TA = TMIN to TMAX TA = +25C MAX384 TA = TMIN to TMAX
INO(OFF)
COM-Off Leakage Current (Note 8)
ICOM(OFF) VCOM = 4.5V, VNO = 0V, V+ = 5.5V
COM-On Leakage Current (Note 8)
ICOM(ON)
VCOM = 4.5V, VNO = 4.5V, V+ = 5.5V
DIGITAL LOGIC INPUT DIGITAL LOGIC INPUT Logic High Input Voltage Logic Low Input Voltage Input Current with Input Voltage High Input Current with Input Voltage Low SUPPLY SUPPLY Power-Supply Range Positive Supply Current Negative Supply Current IGND Supply Current I+ IIGND VEN = VA = 0V, V+; V+ = 5.5V; V- = 0V VEN = VA = 0V, V+; V+ = 5.5V; V- = 0V VEN = V+, 0V; VA = 0V; V+ = 5.5V; V- = 0V TA = +25C TA = TMIN to TMAX 2.4 -1.0 -1.0 -1.0 -1.0 15 1.0 1.0 1.0 1.0 V A A A VH, VENH VL, VENL IH, IENH IL, IENL VH = 2.4V, VL = 0.8V VH = 2.4V, VL = 0.8V TA = TMIN to TMAX TA = TMIN to TMAX
4
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Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs
ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued)
(V+ = +5V 10%, V- = 0V, GND = 0V, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, WR = 0V, RS = 2.4V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER DYNAMIC Transition Time Break-Before-Make Interval Enable Turn-On Time (Note 3) Enable Turn-Off Time (Note 3) Write Turn-On Time (Note 3) Reset Turn-Off Time (Note 3) Charge Injection (Note 3) tTRANS tOPEN tON(EN) tOFF(EN) tON(WR) tOFF(RS) VCTE Figure 1, VNO = 3V Figure 2 (Note 3) Figure 3 Figure 3 Figure 4 Figure 4 Figure 7, CL = 100pF, VNO = 0V TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C 1.5 80 5 90 40 130 200 275 200 275 200 275 200 275 5 280 ns ns ns ns ns ns pC pC SYMBOL CONDITIONS MIN TYP MAX (Note 2) UNITS
MAX382/MAX384
ELECTRICAL CHARACTERISTICS--Single +3V Supply
(V+ = +3V 10%, V- = 0V, GND = 0V, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, WR = 0V, RS = 2.4V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SWITCH Analog Signal Range On-Resistance DYNAMIC Transition Time (Note 3) Enable Turn-On Time (Note 3) Enable Turn-Off Time (Note 3) Write Turn-On Time (Note 3) Reset Turn-Off Time (Note 3) Charge Injection (Note 3)
Note 2: Note 3: Note 4: Note 5:
SYMBOL
CONDITIONS
MIN
TYP MAX (Note 2) V+ 230 375 425
UNITS
VANALOG RON
(Note 3) INO = 1mA, VCOM = 1.5V, V+ = 3V TA = +25C TA = TMIN to TMAX
V-
V
tTRANS tON(EN) tOFF(EN) tON(WR) tOFF(RS) VCTE
Figure 1, VIN = 2.4V, VN01 = 1.5V, VN08 = 0V Figure 3, VINH = 2.4V, VINL = 0V, VN01 = 1.5V Figure 3, VINH = 2.4V, VINL = 0V, VN01 = 1.5V Figure 4 Figure 4 Figure 7, CL = 100pF, VNO = 0V
TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C
230 200 75 200 75 1
575 500 400 500 400 5
ns ns ns ns ns pC
The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Guaranteed by design. RON = RON(max) - RON(min). Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges, i.e., VNO = 3V to 0V and 0V to -3V. Note 6: Leakage parameters are 100% tested at maximum rated hot operating temperature, and guaranteed by correlation at +25C. Note 7: Worst-case isolation is on channel 4 because of its proximity to the COM pin. Off isolation = 20log V COM/VNO, VCOM = output, VNO = input to off switch. Note 8: Leakage testing at single supply is guaranteed by correlation testing with dual supplies.
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5
Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs MAX382/MAX384
__________________________________________Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
MAX398/9 TOC1
ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES)
MAX398/9 TOC2
ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
275 250 225 V- = 0V
MAX398/9 TOC3
110 100 90 V = 3V RON ()
110 100 90 RON ()
V+ = 5V V- = -5V
300
70 60 50 40 30 -5 -4 -3 -2 -1 0 1 2 3 4 5 VCOM (V) V = 5V
70 60 50 40 30
TA = +85C TA = +25C
RON ()
80
80
TA = +125C
200 175 150 125 100 75 50 V+ = 5V V+ = 3V
TA = -55C
-5 -4 -3 -2 -1
0
1
2
3
4
5
0
1
2
3
4
5
VCOM (V)
VCOM (V)
ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX398/9 TOC4
OFF-LEAKAGE vs. TEMPERATURE
MAX398/9 TOC5
ON-LEAKAGE vs. TEMPERATURE
V+ = 5.5V V- = -5.5V
MAX398/9 TOC6
180 160 140 RON () 120 100 80 60 40
V+ = 5V V- = 0V TA = +125C TA = +85C TA = +25C
1000
V+ = 5.5V V- = -5.5V
10,000
100 OFF-LEAKAGE (pA) ON-LEAKAGE (pA)
1000
100
10
10 1
TA = -55C
1
0.1 0 1 2 3 4 5 -50 -25 VCOM (V) 0 25 50 75 TEMPERATURE (C) 100 125
0.1 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125
CHARGE INJECTION vs. VCOM
MAX398/9 TOC7
SUPPLY CURRENT vs. TEMPERATURE
V+ = 5V V- = -5V VEN = VA = 0V, 5V I+
MAX398/9 TOC8
5
10
0 V+ = 5V V- = -5V V+ = 5V V- = 0V
I+, I- (nA)
Qj (pC)
1
I-
-5 -5 -4 -3 -2 -1 0 1 2 3 4 5 VCOM (V)
0.1 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125
6
_______________________________________________________________________________________
Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs
______________________________________________________________Pin Description
PIN MAX382 1 2, 16, 17 -- 3 4 5-8 -- 9 -- 10-13 -- 14 15 18 MAX384 1 -- 2, 17 3 4 -- 5-8 -- 9, 10 -- 11-14 15 16 18 NAME* WR A0, A2, A1 A0, A1 EN VNO1-NO4 NO1A-NO4A COM COMA, COMB NO8-NO5 NO4B-NO1B V+ GND RS WRITE Logic Input Address Logic Inputs (see Truth Tables at end of data sheet) Address Logic Inputs (see Truth Tables at end of data sheet) Enable Logic Input (see Truth Tables at end of data sheet) Negative Supply Voltage Input. Connect to GND for single-supply operation. Analog Signal Inputs--bidirectional Analog Signal Inputs--bidirectional Analog Signal Output--bidirectional Analog Signal Outputs--bidirectional Analog Signal Inputs--bidirectional Analog Signal Inputs--bidirectional Positive Supply Voltage Input Ground RESET Logic Input FUNCTION
MAX382/MAX384
*Analog inputs and outputs are names of convenience only. Inputs and outputs are identical and interchangeable.
__________Applications Information
The internal structures of the MAX382/MAX384 include translators for the A2/A1/EN/WR/RS digital inputs, latches, and a decode section for channel selection (see Truth Tables). The analog-signal switches consist of parallel combinations of N and P MOSFETs. WRITE (WR) and RESET (RS) strobes are provided for interfacing with P-bus lines, alleviating the need for the P to provide constant address inputs to the mux to hold a particular channel (Figures 2-7). When the WR strobe is in the low state (less than 0.8V) and the RS strobe is in the high state (greater than 2.4V), the muxes are in the transparent mode--they act similar to nonlatching devices, such as the MAX398/MAX399.
When the WR goes high, the previous BCD address input is latched and held in that state indefinitely. RS turns off all channels when it is low. All switches stay off until RS and EN are high and WR is low. The MAX382/MAX384 work with both single and dual supplies and function over the +2.4V to +16V singlesupply range. For example, with a single +5V power supply, analog signals in the 0V to +5V range can be switched normally. If negative signals around 0V are expected, a negative supply is needed. The EN latch allows all switches to be turned off under program control. This is useful when two or more are cascaded to build 16-line and larger analog-signal multiplexers.
_______________________________________________________________________________________
7
Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs MAX382/MAX384
______________________________________________Test Circuits/Timing Diagrams
+5V V+ +2.4V RS EN A0 A1 A2 GND 50 +5V V+ +2.4V RS EN A0 A1 GND 50 -5V WR NO1B -5V SWITCH OUTPUT VOUT WR V300 NO1 NO2-NO7 3V
MAX382
NO8 COM
3V VOUT 35pF LOGIC INPUT +3V 50% 0V VNO_
tR < 20ns tF < 20ns
90%
3V
0V 90% VNO_
MAX384
300 NO1A-NO4A COMA, N02B-N03B NO4B COMB V35pF 3V VOUT
tTRANS
tTRANS
Figure 1. Transition Time
+5V V+ VAH = +3V VA VOUT 50% tOPEN -5V *SIMILAR CONNECTION FOR MAX384 50% 0V VA 50 +2.4V A2 A1 A0 EN RS WR GND VN01 N02- N08 COM 1k VOUT 35pF +5V
MAX382*
Figure 2. Break-Before-Make Interval (tOPEN)
8
_______________________________________________________________________________________
Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs MAX382/MAX384
+5V V+ VAH = +3V 50% VEN 50% 0V A1 A0 0.9 VO VOUT 0V tON(EN) tOFF(EN) VEN 50 +2.4V EN RS WR GND V-5V *SIMILAR CONNECTION FOR MAX384 A2 N01 N02- N03 COM, COMB 1k VOUT 35pF +10V
MAX382*
Figure 3. Enable Delay (tON(EN), tOFF(EN))
+5V V+ +2.4V VWR +3V +1.5V 0V 50% tON (WR) 0.2VO VOUT 0V +2.4V LOGIC INPUT EN A0, A1, (A2) N01 or N01B ALL N0_ COM, COMB GND V1k VOUT 35pF
+5V
MAX382*
RS WR
-5V DEVICE MUST BE RESET PRIOR TO APPLYING WR PULSE *SIMILAR CONNECTION FOR MAX384
Figure 4. Write Turn-On Time (tON(WR))
WR
3V 50% 0V tW tS tH 80% RS
3V 50% 0V tRS SWITCH V OUTPUT O tOFF (RS) 80%
A0, A1, (A2) 3V EN 0V
20%
Figure 5. Write, Setup, and Hold Timing (tW, tS, tH)
_______________________________________________________________________________________
9
Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs MAX382/MAX384
+5V V+ +2.4V RS +3V +1.5V VOUT 0V VO 50% tOFF (RS) RS 0.8VO LOGIC INPUT WR COM, COMB GND V1k EN A0, A1, MAX382 (A2) N01 N01- N08 VOUT 35pF +5V
-5V
Figure 6. Reset Turn-Off Time (tOFF(RS))
+5V V+ OFF EN VOUT ON OFF RGEN VOUT A0, A1, (A2) N0_ IN VGEN VOUT IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION. THE CHARGE IN COULOMBS IS Q = CL x VO 3V GND WR V-5V RS COM +2.4V
MAX382 MAX384
VOUT CL 100pF
Figure 7. Charge Injection (VCTE)
Operation with Supply Voltages Other than 5V
Using supply voltages less than 5V reduces the analog signal range. The MAX382/MAX384 muxes operate with 3V to 8V bipolar supplies or with a +2.7V to +16.5V single supply. Connect V- to GND when operating with a single supply. Both devices can also operate with unbalanced supplies, such as +10V and -5V. The Typical Operating Characteristics graphs show typical on-resistance with 3V, 5V, +3V and +5V supplies. (Switching times increase by a factor of two or more for operation at +5V or below.)
Overvoltage Protection
Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings can cause permanent damage to the devices. Always sequence V+ on first, then V-, followed by the logic inputs, NO, or COM. If power-supply sequencing is not possible, add two small signal diodes (D1, D2) in series with supply pins for overvoltage protection (Figure 8). Adding diodes reduces the analog signal range to one diode drop below V+ and one diode drop above V-, but does not affect the devices' low switch resistance and low leakage characteristics. Device operation is unchanged, and the difference between V+ and V- should not exceed 17V. These protection diodes are not recommended when using a single supply.
10
______________________________________________________________________________________
Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs MAX382/MAX384
+5V D1 V+
MAX382 MAX384
*
COM
*
NO
*
*
VD2 -5V * INTERNAL PROTECTION DIODES
Figure 8. Overvoltage Protection Using External Blocking Diodes
__________________________________________Functional Diagrams/Truth Tables
MAX382 8-CHANNEL SINGLE-ENDED MULTIPLEXER
V+ NO1 NO2 NO3 NO4 NO5 NO6 NO7 NO8 DECODERS / DRIVERS LATCHES WR A2 A2 Latching X Reset X X X X X 0 NONE (latches cleared) NONE 1 2 3 4 5 6 7 8 X X X 1 Maintains previous switch condition A1 A0 A1 EN WR A0 RS EN ON SWITCH A1 Latching X Reset X X X X 0 NONE (latches cleared) NONE 1 2 3 4 X X 1 Maintains previous switch condition A0 EN RS WR A1 WR RS A0 EN ON SWITCH COM NO1B NO2B NO3B NO4B DECODERS / DRIVERS LATCHES RS COMB VGND NO1A NO2A NO3A NO4A COMA
MAX384 DIFFERENTIAL 4-CHANNEL MULTIPLEXER
V+ VGND
Transparent Operation X 0 0 0 0 1 1 1 1 X 0 0 1 1 0 0 1 1 X 0 1 0 1 0 1 0 1 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
Transparent Operation X 0 0 1 1 X 0 1 0 1 0 1 1 1 1 0 0 0 0 0 1 1 1 1 1
LOGIC "0" = VAL 0.8V, LOGIC "1" VAH 2.4V
______________________________________________________________________________________
11
Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers with Latchable Inputs MAX382/MAX384
_Ordering Information (continued)
PART MAX384CPN MAX384CWN MAX384C/D MAX384EPN MAX384EWN MAX384EJN MAX384MJN TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 18 Plastic DIP 18 Wide SO Dice* 18 Plastic DIP 18 Wide SO 18 CERDIP** 18 CERDIP**
* Contact factory for dice specifications. ** Contact factory for package availability.
__________________________________________________________Chip Topographies
MAX382 MAX384
AO WR
RS A1
A2
AO WR
RS A1 N.C.
EN VGND V+ NO1 0.116" N.C. (2.95mm) NO5 NO2 NO3 NO6 NO7 NO4 COM NO8 COM NO8
EN VGND V+ NO1A 0.116" NO1B (2.95mm) NO2B NO2A NO3A NO3B NO4B NO4A COM NO8 COMA COMB
0.082" (2.08mm)
0.082" (2.08mm)
TRANSISTOR COUNT: 165 SUBSTRATE CONNECTED TO V+
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1995 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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