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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 1 2109876543212109876543210987654321098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74LVTCH16244
3.3V 16-Bit Buffer/Line Driver with 3-State Outputs
Product Features
* Advanced low power CMOS design for 2.7V to 3.6V Vcc operation * Supports 5V input/output tolerance in mixed signal mode operation * Function compatible with LVT family of products * Balanced 24mA output drive * Typical VOGB (Output Ground Bounce) <0.8V at VCC=3.3V, TA=25C * Ioff and Power Up/Down 3-State support live insertion * Bus Hold on data inputs eliminates the need for external pull-up/down resistors * Latch-up performance exceeds 200mA Per JESD78 * ESD protection exceeds JESD 22 - 2000V Human-Body Model (A114-B) - 200V Machine Model (A115-A) * Industrial Temperature: -40C to +85C * Available Packages (Pb-free & Green available): - 48-pin 240-mil wide plastic TSSOP (A)
Product Description
The PI74LVTCH16244 is a non-inverting 16-bit buffer and line driver designed for low-voltage 2.7V to 3.6V VCC operation, with the capability of interfacing to the 5V system environment. This buffer/ driver is designed specifically to improve both the performance and density of 3-State memory address drivers, clock drivers, and busoriented receivers and transmitters. The device can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. The PI74LVTCH16244 has "Bus Hold" which retains the data input's last valid logic state whenever the data input goes to highimpedance, preventing "floating" inputs and eliminating the need for pull-up/down resistors. When Vcc is between 0 to 1.5V during power up or power down, the device is in the high-impedance state. To ensure the highimpedance state above 1.5V, OE should be tied to Vcc through a pullup resistor; the minimum value of the resistor is determined by the current sinking capability of the driver. The device fully supports live-insertion with its Ioff and power-up/ down 3-state. The Ioff circuitry disables the outputs when the power is off, preventing the backflow of damaging current through the device. Power-up/down 3-state places the outputs in the highimpedance state during power up or power down, preventing driver conflict.
13 14 3Y1
Logic Block Diagram
1OE 1 1A1 47 46 2 3 1Y1 3OE 25 3A1 36 35
1A2
1Y2
3A2
3Y2
1A3
44 43
5 6
1Y3
3A3
33 32
16 17
3Y3
1A4
1Y4
3A4
3Y4
2OE 2A1
48 41 40 8 2Y1 9
4OE 4A1
24 30 29 19 20
4Y1
2A2
2Y2
4A2
4Y2
2A3
38 37
11 2Y3 12
4A3
27 26
22 23
4Y3
2A4
2Y4
4A4
4Y4
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Truth Table
xOE L L H
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PI74LVTCH16244 3.3V 16-Bit Buffer/Line Driver with 3-State Outputs
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Supply voltage range, VCC .............................. -0.5V to +6.5V Input voltage range, VI(1) ................................. -0.5V to +6.5V Voltage range applied to any output in the high-impedance or power-off state, VO(1) ........ -0.5V to +6.5V Voltage range applied to any output in the active state, VO(1,2) .................................... -0.5V to VCC +0.5V Input clamp current, IIK (VI <0) ..................................... -50mA Output clamp current, IOK (VO <0) ............................... -50mA Continous Output Current IO ....................................... 50mA Continous Current through each VCC or GND pin .............. 100mA Package thermal impedance, JA(3) ............................ 104C/W Storage Temperature range, Tstg ..................... -65C to 150C
Product Pin Description
Pin Name xOE xAx xYx GND VC C Inputs 3- State Outputs Ground Power De s cription 3- State Output Enable Inputs (Active LOW)
Product Pin Configuration
1OE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
2OE 1A1 1A2 GND 1A3 1A4 VCC 2A1 2A2 GND 2A3 2A4 3A1 3A2 GND 3A3 3A4 VCC 4A1 4A2 GND 4A3 4A4 3OE
Notes: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 1. Input negative-voltage and output voltage ratings may be exceeded if the input and output clamp current ratings are observed. 2. This value is limited to 6.5V maximum. 3. The package thermal impedance is calculated in accordance with JESD 51.
1Y1 1Y2 GND 1Y3 1Y4 VCC 2Y1 2Y2 GND 2Y3 2Y4 3Y1 3Y2
(1)
GND
Inputs xAx H L X
Outputs xYx H L Z
3Y3 3Y4 VCC 4Y1 4Y2 GND 4Y3 4Y4 4OE
Notes: 1. H = High Signal Level L = Low Signal Level X = Don't Care or Irrelevant Z = High Impedance
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PI74LVTCH16244 3.3V 16-Bit Buffer/Line Driver with 3-State Outputs
Recommended Operating Conditions(1)
M in. VCC VIH VIL VI VO Supply Voltage High- level Input Voltage Low- level Input Voltage Input Voltage Output Voltage High or Low State 3- State IOH High- level output current IOL Low- level output current t/v Input transition rise or fall rate t/VCC Power- up ramp rate TA Operating free- air temperature 150 -40 85 VCC = 2.7V VCC = 3.0V to 3.6V VCC = 2.7V VCC = 3.0V to 3.6V Operating VCC = 2.7V to 3.6V VCC = 2.7V to 3.6V 0 0 0 2.7 2 .0 0. 8 5 .5 VCC 5.5 -12 -24 12 24 10 ns/V s/V C mA M a x. 3 .6 Units V
Notes: 1. All unused inputs must be held at VCC or GND to ensure proper device operation.
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PI74LVTCH16244 3.3V 16-Bit Buffer/Line Driver with 3-State Outputs
DC Electrical Characteristics (Over the Operating Range, TA = -40C +85C)
Parame te rs VIK De s cription Clamp Diode Voltage VCC = 2.7V VCC = 2.7V to 3.6V VOH Output High Voltage VCC = 2.7V VCC = 3V VCC = 2.7V to 3.6V VOL Output Low Voltage VCC = 2.7V VCC = 3V Control Inputs VCC = 0V to 3.6V II Input Leakage Current Data Inputs VCC = 3.6V Te s t Conditions II = -18mA IOH = -100A IOH = -12mA IOH = -12mA IOH = -24mA IOL = 100A IOL = 12mA IOL = 12mA IOL = 24mA VI = 0V to5.5V VI = 5.5V VI = VCC VI = GND II(HOLD) IOFF IOZ IOZPU IOZPD ICC ICC Data Input Hold Current VCC = 3V VCC = 3.6V(1) Power Off Output Leakage Current 3- State Output Leakage Current Power- Up 3- State Current Power- Down 3- State Current Quiescent Power Supply Current Increase in ICC VCC = 0V VCC = 2.7V to 3.6V VCC = 0V to 1.5V VCC = 1.5V to 0V VCC = 2.7V to 3.6V VCC = 3V to 3.6V VI = 0.8V VI = 2V VI = 0 to 3.6V VI or VO = 0V to 5.5V VO = 0V to 5.5V VO = 0.5V to 5.5V, OE = don't care VO = 0.5V to 5.5V, OE = don't care VI = VCC or GND 3.6V VI 5.5V IO = 0 75 -75 50 0 5 5 5 5 100 200 A 5 VCC -0.2V 2. 2 2. 4 2 .2 0 .2 0 .4 0 .4 0.5 5 5 V M in. M ax. -1.2V Units
One input at VCC - 0.6V(2) Other inputs at VCC or GND
Notes: 1. This is the maximum bus-hold dynamic current. It is the minimum overdrive current required to switch the input from one state to another. 2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74LVTCH16244 3.3V 16-Bit Buffer/Line Driver with 3-State Outputs
Capacitance
Parame te rs CI CO CPD De s cription Input Capacitance Output Capacitance Power Dissipation Capacitance (2) Te s t Conditions VCC = 3.3V, VI = VCC or GND VCC = 3.3V, VO = VCC or GND VCC = 3.3V, VI = 0V or VCC, f =10 MHz Typ.(1) 3.7 7 16 pF Units
Notes: 1. All typical values are measured at VCC = 3.3V, TA = 25C 2. CPD is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (ICCD) at no output loading and operating at 50% duty cycle, CPD is related to ICCD dynamic operating current by the expression: ICCD= (CPD)(VCC)(fIN)+(ICCstatic)
Switching Characteristics Over Operating Range
VCC = 3.3V 0.3V Parame te rs De s cription From (Input) To (Output) CL = 50pF, RL = 500-ohm M in. tPLH tPHL tPZH tPZL tPHZ tPLZ tSK(O) Propagation Delay Output Enable Time Output Disable Time Output to Output Skew(2) A Y 1. 0 1. 0 1. 0 1. 0 1. 0 1. 0 Typ.(1) 2.5 2.5 2.9 3.0 2.5 2.4 M ax. 3 .4 3 .4 4.2 4.2 4.0 3 .9 0.5 VCC = 2.7V CL = 50pF, RL = 500-ohm M in. M a x. 3. 8 3 .8 5.0 5.0 4. 7 4.3 ns Units
OE
Y
OE
Y
Notes: 1. All typical values are measured at VCC = 3.3V, TA = 25C 2. Skew between any two outputs, switching in the same direction.
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74LVTCH16244 3.3V 16-Bit Buffer/Line Driver with 3-State Outputs
PARAMETER MEASUREMENT INFORMATION VCC = 2.7V and 3.3V 0.3V
6V From Output Under Test
(See Note A)
500
S1
Open GND
Te s t tPLH/tPHL tPLZ/tPZL tPHZ/tPZH
S1 Open 6V GND
CL = 50pF
500
Load Circuit
tW 2.7V Input 1.5V 1.5V 0V
Voltage Waveforms Pulse Duration
Output Control (Low Level Enabling)
2.7V 1.5V tPZL 1.5V tPZH 1.5V tPLZ 3V VOL+0.3V tPHZ 1.5V VOH -0.3V VOL VOH 0V 0V
2.7V Input 1.5V tPLH 1.5V 1.5V 0V tPHL VOH Output 1.5V VOL
Output Waveform 1 S1 at 6V (see Note B)
Output Waveform 2 S1 at GND (see Note B)
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable and Disable Times
Figure 1. Load Circuit and Voltage Waveforms
Notes: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. * All input impulses are supplied by generators having the following characteristics: PRR 10 MHz, ZO = 50W, tR 2.5ns, tF 2.5ns. * The outputs are measured one at a time with one transition per measurement.
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PS8650B
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74LVTCH16244 3.3V 16-Bit Buffer/Line Driver with 3-State Outputs
Packaging Mechanical: 48-pin TSSOP (A)
48
.236 .244
6.0 6.2
1
.488 12.4 .496 12.6 .047 1.20 Max SEATING PLANE
.004 0.09 .008 0.20 0.45 .018 0.75 .030 .319 BSC 8.1
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.0197 BSC 0.50
.007 .010 0.17 0.27
.002 .006 0.05 0.15
Ordering Information
Orde ring Code PI74LVTCH16244A PI74LVTCH16244AE Package Code A A Package De s cription 48- pin, 240- mil wide plastic TSSOP Pb- free, 48- pin, 240- mil wide plastic TSSOP
Notes: * Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ * E = Pb-free & Green * Adding an X suffix = Tape/Reel
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
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