IDT54/74FCT245/A/C IDT54/74FCT640/A/C IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS Integrated Device Technology, Inc. FEATURES: DESCRIPTION: • IDT54/74FCT245/640/645 equivalent to FAST speed and drive • IDT54/74FCT245A/640A/645A 25% faster than FAST • IDT54/74FCT245C/640C/645C 40% faster than FAST • TTL input and output level compatible • CMOS output level compatible • IOL = 64mA (commercial) and 48mA (military) • Input current levels only 5µA max. • CMOS power levels (2.5mW typical static) • Direction control and over-riding 3-state control • Product available in Radiation Tolerant and Radiation Enhanced versions • Military product compliant to MIL-STD-883, Class B and DESC listed • Meets or exceeds JEDEC Standard 18 specifications The IDT octal bidirectional transceivers are built using an advanced dual metal CMOS technology. The IDT54/ 74FCT245/A/C, IDT54/74FCT640/A/C and IDT54/74FCT645/ A/C are designed for asynchronous two-way 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 IDT54/74FCT245/A/C and IDT54/74FCT645/A/C transceivers have non-inverting outputs. The IDT54/ 74FCT640/A/C has inverting outputs. FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATIONS T/R T/R A0 A1 A2 A3 A4 A5 A6 A7 GND OE A0 B0 A1 B1 A2 B2 1 20 2 19 3 18 P20-1 D20-1 SO20-2 & E20-1 4 5 6 7 17 16 15 14 8 13 9 12 10 11 Vcc OE B0 B1 B2 B3 B4 B5 B6 B7 DIP/SOIC/CERPACK TOP VIEW A3 A1 A0 T/R Vcc OE B3 A4 INDEX B4 3 2 A5 A2 A3 A4 A5 A6 B5 A6 B6 4 5 6 1 20 19 18 L20-2 17 16 7 15 8 14 9 10 11 12 13 B0 B1 B2 B3 B4 A7 GND B7 B6 B5 A7 B7 2534 drw 01 NOTES: 1. FCT245, 645 are noninverting options. 2. FCT640 is the inverting option. LCC TOP VIEW 2534 drw 02 The IDT logo is a registered trademark of Integrated Device Technology, Inc. FAST is a registered trademark of National Semiconductor Co. MILITARY AND COMMERCIAL TEMPERATURE RANGES 1992 Integrated Device Technology, Inc. 7.9 MAY 1992 DSC-4201/3 1 IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES FUNCTION TABLE(2) PIN DESCRIPTION Pin Names Description Inputs OE T/R Output Enable Input (Active LOW) OE T/R Transmit/Receive Input L L Bus B Data to Bus A(1) A0–A7 Side A Inputs or 3-State Outputs L H Bus A Data to Bus B(1) B0–B7 Side B Inputs or 3-State Outputs H X High Z State 2534 tbl 05 NOTES: 1. 640 is inverting from input to output. 2. H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating VTERM(2) Terminal Voltage with Respect to GND VTERM(3) Terminal Voltage with Respect to GND TA Operating Temperature TBIAS Temperature Under Bias TSTG Storage Temperature PT Power Dissipation DC Output Current IOUT Commercial –0.5 to +7.0 Outputs 2534 tbl 06 CAPACITANCE (TA = +25°C, f = 1.0MHz) Military Unit –0.5 to +7.0 V –0.5 to VCC –0.5 to VCC V 0 to +70 –55 to +125 °C –55 to +125 –65 to +135 °C –55 to +125 –65 to +150 °C 0.5 120 0.5 120 W mA Symbol Parameter(1) Conditions Typ. Max. Unit CIN Input Capacitance VIN = 0V 6 10 pF CI/O I/O Capacitance VOUT = 0V 8 12 pF NOTE: 2534 1. This parameter is measured at characterization but not tested. tbl 02 NOTES: 2534 tbl 01 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. Inputs and VCC terminals. 3. Outputs and I/O terminals. 7.9 2 IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS 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 = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10% Symbol Test Conditions(1) Parameter VIH Input HIGH Level VIL Input LOW Level Guaranteed Logic LOW Level IIH Input HIGH Current (Except I/O pins) Input LOW Current (Except I/O pins) VCC = Max Input HIGH Current VCC = Max IIL IIH IIL Guaranteed Logic HIGH Level VI = VCC VI = 2.7V VI = 0.5V VI = GND Typ.(2) Max. Unit 2.0 — — V — — 0.8 V — — — — — — — — 5 5(4) –5(4) –5 µA µA VI = VCC — — 15 (I/O pins only) VI = 2.7V — — 15(4) Input LOW Current VI = 0.5V — — –15(4) (I/O pins only) VIK Min. Clamp Diode Voltage VI = GND VCC = Min., IN = –18mA (3) — — –15 — –0.7 –1.2 V IOS Short Circuit Current VCC = Max. , VO = GND –60 –120 — mA VOH Output HIGH Voltage VCC = 3V, VIN = VLC or VHC, IOH = –32µA VHC VCC — V VCC = Min. IOH = –300µA VHC VCC — VIN = VIH or VIL IOH = –12mA MIL. 2.4 4.3 — IOH = –15mA COM’L. 2.4 4.3 — — GND VLC GND VLC(4) VOL Output LOW Voltage (Port A and Port B) VCC = 3V, VIN = VLC or VHC, IOL = 300µA VCC = Min. IOL = 300µA — VIN = VIH or VIL IOL = 48mA MIL. — 0.3 0.55 IOL = 64mA COM’L. — 0.3 0.55 NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second. 4. This parameter is guaranteed but not tested. 7.9 V 2534 tbl 03 3 IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC – 0.2V Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit — 0.5 1.5 mA — 0.5 2.0 mA ICC Quiescent Power Supply Current ∆ICC Quiescent Power Supply Current TTL Inputs HIGH ICCD Dynamic Power Supply Current(4) Vcc = Max. Outputs Open OE = GND T/R = GND or VCC One Input Toggling 50% Duty Cycle VIN ≥ VHC VIN ≤ VLC — 0.15 0.25 mA/MHz IC Total Power Supply Current(6) Vcc = Max. Outputs Open fi = 10MHz VIN ≥ VHC VIN ≤ VLC (FCT) — 2.0 4.0 mA 50% Duty Cycle T/R = OE = GND One Bit Toggling VIN = 3.4V VIN = GND — 2.3 5.0 Vcc = Max. Outputs Open fi = 2.5MHz VIN ≥ VHC VIN ≤ VLC (FCT) — 3.5 6.5(5) 50% Duty Cycle T/R = OE = GND Eight Bits Toggling VIN = 3.4V VIN = GND — 5.5 14.5(5) Vcc = Max. VIN ≥ VHC; VIN ≤ VLC Vcc = Max. VIN = 3.4V(3) NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C 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 the 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 Output 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. 7.9 2534 tbl 04 4 IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT245/A/C 54/74FCT245 Com’l. Symbol Parameter tPLH tPHL Propagation Delay A to B, B to A tPZH tPZL 54/74FCT245A Mil. Com’l. 54/74FCT245C Mil. Com’l. Mil. Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit CL = 50 pF RL = 500Ω 1.5 7.0 1.5 7.5 1.5 4.6 1.5 4.9 1.5 4.1 1.5 4.5 ns Output Enable Time OE to A or B 1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns tPHZ tPLZ Output Disable Time OE to A or B 1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns tPZH tPZL Output EnableTime T/R to A or B(3) 1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns tPHZ tPLZ Output Disable Time T/R to A or B(3) 1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns 2534 tbl 07 SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT640/A/C 54/74FCT640 Com’l. Symbol Parameter tPLH tPHL Propagation Delay A to B, B to A tPZH tPZL (1) Condition CL = 50 pF RL = 500Ω (2) Min. 54/74FCT640A Mil. (2) Max. Min. Com’l. (2) Max. Min. 54/74FCT640C Mil. (2) Max. Min. Max. Com’l. (2) Min. Mil. Max. Min. (2) Max. Unit 2.0 7.0 2.0 8.0 1.5 5.0 1.5 5.3 1.5 4.4 1.5 4.7 ns Output Enable Time OE to A or B 2.0 13.0 2.0 16.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns tPHZ tPLZ Output Disable Time OE to A or B 2.0 10.0 2.0 12.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns tPZH tPZL Output Enable Time T/R to A or B(3) 2.0 13.0 2.0 16.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns tPHZ tPLZ Output Disable Time T/R to A or B(3) 2.0 10.0 2.0 12.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns 2534 tbl 08 SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT645/A/C 54/74FCT645 Com’l. Symbol Parameter tPLH tPHL Propagation Delay A to B, B to A tPZH tPZL 54/74FCT645A Mil. Com’l. 54/74FCT645C Mil. Com’l. Mil. Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit CL = 50 pF RL = 500Ω 1.5 9.5 1.5 11.0 1.5 4.6 1.5 4.9 1.5 4.1 1.5 4.5 ns Output Enable Time OE to A or B 1.5 11.0 1.5 12.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns tPHZ tPLZ Output Disable Time OE to A or B 1.5 12.0 1.5 13.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns tPZH tPZL Output Enable Time T/R to A or B(3) 1.5 11.0 1.5 12.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns tPHZ tPLZ Output Disable Time T/R to A or B(3) 1.5 12.0 1.5 13.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 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. 2534 tbl 09 7.9 5 IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES TEST CIRCUITS AND WAVEFORMS SWITCH POSITION TEST CIRCUITS FOR ALL OUTPUTS VCC 7.0V 500Ω V OUT VIN Pulse Generator D.U.T. 50pF RT 500Ω SET-UP, HOLD AND RELEASE TIMES Closed All Other Tests Open 3V 1.5V 0V tH TIMING INPUT 3V 1.5V 0V LOW-HIGH-LOW PULSE 3V 1.5V 0V HIGH-LOW-HIGH PULSE 1.5V tW t REM PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. Open Drain Disable Low Enable Low PULSE WIDTH DATA INPUT ASYNCHRONOUS CONTROL Switch DEFINITIONS: 2534 tbl 08 CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. CL t SU Test t SU 1.5V 3V 1.5V 0V tH PROPAGATION DELAY ENABLE AND DISABLE TIMES ENABLE DISABLE 3V 3V 1.5V SAME PHASE INPUT TRANSITION t PLH t PHL CONTROL INPUT t PZL 0V OUTPUT NORMALLY SWITCH LOW CLOSED t PZH VOH 1.5V OUTPUT VOL t PLH t PHL OUTPUT SWITCH NORMALLY OPEN HIGH 3V OPPOSITE PHASE INPUT TRANSITION 1.5V 1.5V 0V t PLZ 3.5V 3.5V 1.5V 0.3V V OL t PHZ 0.3V 1.5V 0V V OH 0V 0V NOTES 2534 drw 04 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. 2. Pulse Generator for All Pulses: Rate ≤ 1.0 MHz; ZO ≤ 50Ω; tF ≤ 2.5ns; tR ≤ 2.5ns. 7.9 6 IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES ORDERING INFORMATION IDT XX Temperature Range FCT X X X Device Type Package Process Blank B Commercial MIL-STD-883, Class B P D SO L E Plastic DIP CERDIP Small Outline IC Leadless Chip Carrier CERPACK 245 640 645 245A 640A 645A 245C 640C 645C Non-Inverting Buffer Transceiver Octal Inverting Buffer Transceiver Non-Inverting Buffer Transceiver Fast Non-Inverting Buffer Transceiver Fast Octal Inverting Buffer Transceiver Fast Non-Inverting Buffer Transceiver Super Fast Non-Inverting Buffer Transceiver Super Fast Octal Inverting Buffer Transceiver Super Fast Non-Inverting Buffer Transceiver 54 74 –55°C to +125°C 0°C to +70°C 2534 drw 03 7.9 7