View IDT74FCT245_198985.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
FEATURES: DESCRIPTION:
IDT54/74FCT245/A/C
* * * * * * * * * * * *
IDT54FCT245 equivalent to FASTTM speed and drive IDT54/74FCT245A 25% faster than FAST IDT74FCT245C 40% faster than FAST TTL input and output compatible CMOS output level compatible IOL = 64mA (commercial) and 48mA (military) Current levels only 5A max. CMOS power levels (2.5mW typ. static) Direction control and overriding 3-state control MIlitary product compliant to MIL-STD-883, Class B Meets or exceeds JEDEC Standard 18 specifications Available in the following packages: - Commercial: SOIC - Military: CERDIP, LCC
The IDT octal bidirectional transceivers are built using an advanced dual metal CMOS technology. The FCT245 is designed for asynchronous twoway communication between data buses. The transmit/receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active high) enables data from A ports to B ports, and receive (active low) from B ports to A ports. The output enable (OE) input, when high, disables both A and B ports by placing them in High-Z condition. The FCT245 transceivers have non-inverting outputs.
FUNCTIONAL BLOCK DIAGRAM
T/R
1 19
OE A0
2 18 3
B0
A1
17
B1 A2
4 16
B2 A3
5 15
B3
6
A4
14
B4 A5
7 13 8 12
B5
A6
B6 A7
9
11
B7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1
JUNE 2002
DSC-5421/1
(c) 2002 Integrated Device Technology, Inc.
IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATION
T/R
A1
A0 A1 A2 A3 A4 A5 A6 A7 GND
2 3 4 5 6 7 8 9 10
19 18 17 16 15 14 13 12 11
OE B0 B1 B2 B3 B4 B5 B6
GND A7 B7 B6
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
A2 A3 A4 A5 A6
A0
INDEX
OE
T/R
1
20
VCC
VCC
4 5 6 7 8
B0 B1 B2 B3 B4
B7
CERDIP/ SOIC TOP VIEW
LCC TOP VIEW
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) TA TBIAS TSTG PT IOUT Rating Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Operating Temperature Temperature under BIAS Storage Temperature Power Dissipation DC Output Current 0 to +70 -55 to +125 -55 to +125 0.5 120 -55 to +125 -65 to +135 -65 to +150 0.5 120 C C C W mA -0.5 to VCC -0.5 to VCC V Commercial -0.5 to +7 Military -0.5 to +7 Unit V
PIN DESCRIPTION
Pin Names OE T/R A0 - A7 B0 - B7 Description Output Enable Input (Active LOW) Transmit/Recieve Input Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs
FUNCTION TABLE(1)
Inputs OE L L H
NOTE: 1. H = HIGH Voltage Level X = Don't Care L = LOW Voltage Level
NOTES: 1. Stresses greater than those listed under ABSOLUTE 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. No terminal voltage may exceed Vcc by +0.5V unless otherwise noted. 2. Input and Vcc terminals only. 3. Output and I/O terminals only.
T/R L H X
B5
Outputs High Z State
Bus B Data to Bus A Bus A Data to Bus B
CAPACITANCE (TA = +25C, F = 1.0MHz)
Symbol CIN CI/O Parameter(1) Input Capacitance I/O Capacitance Conditions VIN = 0V VOUT = 0V Typ. 6 8 Max. 10 12 Unit pF pF
NOTE: 1. This parameter is measured at characterization but not tested.
2
IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: VLC = 0.2V; VHC = VCC - 0.2V Commercial: TA = 0C to +70C, VCC = 5.0V 5%, Military: TA = -55C to +125C, VCC = 5.0V 10%
Symbol VIH VIL IIH IIL IOZH IOZL VIK IOS VOH Off State (High Impedance) Output Current Clamp Diode Voltage Short Circuit Current Output HIGH Voltage VCC = Max. Parameter Input HIGH Level Input LOW Level Input HIGH Current VCC = Max. Input LOW Current Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VI = VCC VI = 2.7V VI = 0.5V VI = GND VO = VCC VO = 2.7V VO = 0.5V VO = GND Min. 2 -- -- -- -- -- -- -- -- -- -- -60 VHC VHC 2.4 2.4 -- -- -- -- Typ.(2) -- -- -- -- -- -- -- -- -- -- -0.7 -120 VCC VCC 4.3 4.3 GND GND 0.3 0.3 Max. -- 0.8 5 5(4) -5(4) -5 15 15(4) -15(4) -15 -1.2 -- -- -- -- -- VLC VLC(4) 0.55 0.55 A A Unit V V
VCC = Min., IIN = -18mA VCC = Max., VO = GND(3) VCC = 3V, VIN = VLC or VHC, IOH = -32A VCC = Min IOH = -300A VIN = VIH or VIL IOH = -12mA MIL IOH = -15mA COM'L VCC = 3V, VIN = VLC or VHC, IOL = 300A VCC = Min IOL = 300A VIN = VIH or VIL IOL = 32mA MIL IOL = 48mA COM'L
V mA V
VOL
Output LOW Voltage
V
NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient and maximum loading. 3. Not more than one output should be tested at one time. Duration of the test should not exceed one second. 4. This parameter is guaranteed but not ttested.
3
IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
VLC = 0.2V; VHC = VCC - 0.2V
Symbol ICC ICC ICCD Parameter Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) Test Conditions(1) VCC = Max. VIN VHC; VIN VLC VCC = Max. VIN = 3.4V(3) VCC = Max. Outputs Open OE = GND T/R = GND or VCC One Input Toggling 50% Duty Cycle VCC = Max. Outputs Open fI = 10MHz 50% Duty Cycle T/R = OE = GND One Bit Toggling VCC = Max. Outputs Open fI = 2.5MHz 50% Duty Cycle T/R = OE = GND Eight Bits Toggling
NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of ICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fiNi) ICC = Quiescent Current ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for register devices (zero for non-register devices) fi = Input Frequency Ni = Number of Inputs at fi All currents are in milliamps and all frequencies are in megahertz.
Min. -- --
Typ.(2) 0.2 0.5 0.15
Max. 1.5 2 0.25
Unit mA mA mA/ MHz
VIN VHC VIN VLC
--
IC
Total Power Supply Current(6)
VIN VHC VIN VLC (FCT) VIN = 3.4V VIN = GND VIN VHC VIN VLC (FCT) VIN = 3.4V VIN = GND
--
2
4
mA
--
2.3
5
--
3.5
6.5(5)
--
5.5
14.5(5)
4
IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ Parameter Propagation Delay A to B, B to A Output Enable Time OE to A or B Output Disable Time OE to A or B Output Enable Time T/R to A or B(3) Output Disable Time T/R to A or B(3) Condition(1) CL = 50pF RL = 500 54FCT245 Mil. Min.(2) Max. 1.5 7.5 1.5 1.5 1.5 1.5 10 10 10 10 54/74FCT245A Com'l. Mil. Min.(2) Max. Min.(2) Max. 1.5 4.6 1.5 4.9 1.5 1.5 1.5 1.5 6.2 5 6.2 5 1.5 1.5 1.5 1.5 6.5 6 6.5 6 74FCT245C Com'l. Min.(2) Max. 1.5 4.1 1.5 1.5 1.5 1.5 5.8 4.8 5.8 4.8 Unit ns ns ns ns ns
NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not tested.
5
IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
V CC 500 VIN Pulse Generator RT D.U.T . VOUT 7.0V
SWITCH POSITION
Test Open Drain Disable Low Enable Low Switch Closed Open
50pF CL
500
All Other Tests
DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Octal link
Test Circuits for All Outputs
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC.
tSU
tH
tREM
3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
Octal link
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
Octal link
1.5V
1.5V
tSU
tH
Pulse Width
Set-Up, Hold, and Release Times
ENABLE SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL 3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V
Octal link
DISABLE 3V 1.5V 0V 3.5V 0.3V tPHZ 0.3V 1.5V 0V VOH 0V
Octal link
CONTROL INPUT tPZL OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH SWITCH CLOSED tPZH SWITCH OPEN 3.5V 1.5V tPLZ
VOL
Propagation Delay
Enable and Disable Times
NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. 2. Pulse Generator for All Pulses: Rate 1.0MHz; ZO 50; tF 2.5ns; tR 2.5ns.
6
IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
FCT IDT XX XXXX Temp. Range Device Type XX Package X Process Blank B Commercial MIL-STD-883, Class B Commercial Options Small Outline IC Military Options CERDIP Leadless Chip Carrier
SO D L
245 245A 245C
Octal Bidirectional Transceiver
54 74
- 55C to +125C 0C to +70C
CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054
for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com
for Tech Support: logichelp@idt.com (408) 654-6459
7

▲Up To Search▲

Price & Availability of IDT74FCT245

	To Download IDT74FCT245 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .