FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT IDT54/74FCT640T/AT/CT IDT54/74FCT645T/AT/CT/DT Integrated Device Technology, Inc. FEATURES: DESCRIPTION: • Common features: – Low input and output leakage ≤1µA (max.) – CMOS power levels – True TTL input and output compatibility – VOH = 3.3V (typ.) – VOL = 0.3V (typ.) – Meets or exceeds JEDEC standard 18 specifications – Product available in Radiation Tolerant and Radiation Enhanced versions – Military product compliant to MIL-STD-883, Class B and DESC listed (dual marked) – Available in DIP, SOIC, SSOP, QSOP, CERPACK and LCC packages • Features for FCT245T/FCT640T/FCT645T: – Std., A, C and D speed grades – High drive outputs (-15mA IOH, 64mA IOL) • Features for FCT2245T: – Std., A and C speed grades – Resistor outputs (-15mA IOH, 12mA IOL Com.) (-12mA IOH, 12mA IOL Mil.) – Reduced system switching noise The IDT octal bidirectional transceivers are built using an advanced dual metal CMOS technology. The FCT245T/ FCT2245T, FCT640T and FCT645T 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 FCT245T/FCT2245T and FCT645T transceivers have non-inverting outputs. The FCT640T has inverting outputs. The FCT2245T has balanced drive outputs with current limiting resistors. This offers low ground bounce, minimal undershoot and controlled output fall times- reducing the need for external series terminating resistors. The FCT2xxxT parts are plug-in replacements for FCTxxxT parts. FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATIONS T/R A0 A1 A2 A3 A4 A5 A6 A7 GND T/R OE A0 B0 A1 B1 A2 B2 1 20 2 19 3 P20-1 D20-1 SO20-2 SO20-7* SO20-8** & E20-1 4 5 6 7 8 18 17 16 15 14 13 9 12 10 11 Vcc OE B0 B1 B2 B3 B4 B5 B6 B7 B3 A4 2539 drw 02 A1 A0 T/R Vcc OE DIP/SOIC/SSOP/QSOP/CERPACK TOP VIEW *FCT245T/2245T, FCT645T only. **FCT245T/2245T, FCT640T A3 INDEX B4 3 A5 A2 A3 A4 A5 A6 B5 A6 B6 A7 FCT245T/2245T, FCT645T are non-inverting options. FCT640T is the inverting options. 2539 drw 01 The IDT logo is a registered trademark of Integrated Device Technology, Inc. MILITARY AND COMMERCIAL TEMPERATURE RANGES 1995 Integrated Device Technology, Inc. 2 1 20 19 18 5 6 17 L20-2 16 7 15 8 14 9 10 11 12 13 A7 GND B7 B6 B5 B7 4 6.9 B0 B1 B2 B3 B4 2539 drw 03 LCC TOP VIEW AUGUST 1995 DSC-4611/4 1 IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES FUNCTION TABLE(2) PIN DESCRIPTION Pin Names OE T/R Description Output Enable Input (Active LOW) Inputs 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 B Data to Bus B(1) B0-B7 Side B Inputs or 3-State Outputs H X High Z State 2539 tbl 01 ABSOLUTE MAXIMUM RATINGS(1) Military –0.5 to +7.0 Unit V –0.5 to VCC +0.5 V –55 to +125 °C –65 to +135 °C –65 to +150 °C 0.5 W I OUT –60 to +120 mA –60 to +120 2539 tbl 02 NOTES: 1. 640 is inverting from input to output. 2. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care CAPACITANCE (TA = +25°C, F = 1.0MHZ) Symbol Rating Commercial VTERM(2) Terminal Voltage –0.5 to +7.0 with Respect to GND VTERM(3) Terminal Voltage –0.5 to with Respect to VCC +0.5 GND TA Operating 0 to +70 Temperature TBIAS Temperature –55 to +125 Under Bias TSTG Storage –55 to +125 Temperature PT Power Dissipation 0.5 DC Output Current Outputs Symbol Parameter(1) CIN Input Capacitance COUT Output Capacitance Conditions VIN = 0V Typ. 6 VOUT = 0V 8 Max. Unit 10 pF 12 NOTE: 1. This parameter is measured at characterization but not tested. pF 2539 lnk 04 2539 lnk 03 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. Outputs and I/O terminals only. 6.9 2 IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10% Symbol VIH Parameter Input HIGH Level Test Conditions(1) Guaranteed Logic HIGH Level Min. 2.0 Typ.(2) — Max. — Unit V VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V II H Input HIGH Current(4) VCC = Max. VI = 2.7V — — ±1 µA II L Input LOW Current (4) VI = 0.5V — — ±1 I OZH High Impedance Output Current I OZL (3-State Output pins) (4) II Input HIGH Current(4) VCC = Max., VI = VCC (Max.) VIK Clamp Diode Voltage VH Input Hysteresis I CC Quiescent Power Supply Current VO = 2.7V — — ±1 VO = 0.5V — — ±1 — — ±1 VCC = Min., IIN = –18mA — –0.7 –1.2 V — — 200 — mV — 0.01 1 VCC = Max. VCC = Max., VIN = GND or VCC µA µA mA 2539 lnk 05 OUTPUT DRIVE CHARACTERISTICS FOR FCT245T/640T/645T Symbol VOH Parameter Output HIGH Voltage VOL Output LOW Voltage I OS Short Circuit Current Test Conditions(1) VCC = Min. I OH = –6mA MIL. VIN = VIH or V IL I OH = –8mA COM'L. I OH = –12mA MIL. I OH = –15mA COM'L. VCC = Min. I OL = 48mA MIL. VIN = VIH or V IL I OL = 64mA COM'L. VCC = Max., VO = GND (3) Min. 2.4 Typ.(2) 3.3 Max. — Unit V 2.0 3.0 — V — 0.3 0.55 V –60 –120 –225 mA 2539 lnk 06 OUTPUT DRIVE CHARACTERISTICS FOR FCT2245T Symbol I ODL Parameter Output LOW Current Test Conditions(1) VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3) Min. 16 Typ.(2) 48 Max. — Unit mA I ODH Output HIGH Current VCC = 5V, VIN = VIH or V IL, VOUT = 1.5V (3) –16 –48 — mA VOH Output HIGH Voltage 2.4 3.3 — V VOL Output LOW Voltage VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or V IL — 0.3 0.50 V I OH = –12mA MIL. I OH = –15mA COM'L. I OL = 12mA 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. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second. 4. The test limit for this parameter is ±5µA at TA = –55°C. 6.9 2539 lnk 07 3 IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES POWER SUPPLY CHARACTERISTICS Symbol ∆ICC ICCD IC Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) Total Power Supply Current (6) Test Conditions(1) VCC = Max. VIN = 3.4V(3) VCC = Max. Outputs Open OE = T/R = GND One Input Toggling 50% Duty Cycle VCC = Max. Min. — Typ.(2) 0.5 Max. 2.0 Unit mA mA/ MHz VIN = VCC FCTxxxT VIN = GND FCT2xxxT — 0.15 0.25 — 0.06 0.12 VIN = VCC — 1.5 3.5 FCTxxxT Outputs Open fi = 10MHz 50% Duty Cycle VIN = GND FCT2xxxT — 0.6 2.2 VIN = 3.4 — 1.8 4.5 OE = T/R = GND VIN = GND FCT2xxxT 0.9 3.2 One Bit Toggling VCC = Max. VIN = VCC — 3.0 6.0 (5) FCTxxxT FCTxxxT Outputs Open fi = 2.5MHz 50% Duty Cycle VIN = GND FCT2xxxT — 1.2 3.4 (5) VIN = 3.4 — 5.0 14.0 (5) OE = T/R = GND VIN = GND FCT2xxxT — 3.2 11.4 (5) FCTxxxT mA Eight Bits Toggling 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 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. 6.9 2539 tbl 08 4 IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS OVER OPERATING RANGE FCT245T FCT2245T FCT245AT FCT2245AT Com'l. 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) Conditions(1) CL = 50 pF RL = 500Ω Mil. Com'l. Mil. Min.(2) 1.5 Max. 7.0 Min.(2) 1.5 Max. 7.5 Min.(2) 1.5 Max. 4.6 Min.(2) 1.5 Max. 4.9 Unit ns 1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 ns 1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns 1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 ns 1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns 2534 tbl 09 FCT245CT FCT2245CT Com'l. 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) Conditions(1) CL = 50 pF RL = 500Ω FCT245DT Mil. Com'l. Mil. Min.(2) 1.5 Max. 4.1 Min.(2) 1.5 Max. 4.5 Min.(2) 1.5 Max. 3.8 Min.(2) — Max. — Unit ns 1.5 5.8 1.5 6.2 1.5 5.0 — — ns 1.5 4.8 1.5 5.2 1.5 4.3 — — ns 1.5 5.8 1.5 6.2 1.5 5.0 — — ns 1.5 4.8 1.5 5.2 1.5 4.3 — — ns 2534 tbl 10 SWITCHING CHARACTERISTICS OVER OPERATING RANGE FCT640T Com'l. 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) FCT640AT Mil. Com'l. FCT640CT Mil. Com'l. Mil. Conditions(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) 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 CL = 50 pF RL = 500Ω 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 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 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 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 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 11 6.9 5 IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS OVER OPERATING RANGE FCT645T Com'l. 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) FCT645AT Mil. Com'l. Mil. Conditions(1) Min.(2) 1.5 1.5 Max. 4.6 Min.(2) 1.5 Max. 11.0 Min.(2) CL = 50 pF RL = 500Ω Max. 9.5 Min.(2) 1.5 Max. 4.9 Unit ns 1.5 11.0 1.5 12.0 1.5 6.2 1.5 6.5 ns 1.5 12.0 1.5 13.0 1.5 5.0 1.5 6.0 ns 1.5 11.0 1.5 12.0 1.5 6.2 1.5 6.5 ns 1.5 12.0 1.5 13.0 1.5 5.0 1.5 6.0 ns 2534 tbl 12 FCT645CT Com'l. 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) FCT645DT Mil. Com'l. Mil. Conditions(1) Min.(2) 1.5 1.5 Max. 3.8 Min.(2) 1.5 Max. 4.5 Min.(2) CL = 50 pF RL = 500Ω Max. 4.1 Min.(2) — Max. — Unit ns 1.5 5.8 1.5 6.2 1.5 5.0 — — ns 1.5 4.8 1.5 5.2 1.5 4.3 — — ns 1.5 5.8 1.5 6.2 1.5 5.0 — — ns 1.5 4.8 1.5 5.2 1.5 4.3 — — 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 13 6.9 6 IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES TEST CIRCUITS AND WAVEFORMS SWITCH POSITION TEST CIRCUITS FOR ALL OUTPUTS V CC 7.0V 500Ω Pulse Generator Switch Open Drain Disable Low Closed Enable Low V OUT VIN Test Open All Other Tests D.U.T. 50pF RT DEFINITIONS: 2534 lnk 14 CL= Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. 500Ω CL 2534 drw 04 SET-UP, HOLD AND RELEASE TIMES DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. tH tSU tREM tSU PULSE WIDTH 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V LOW-HIGH-LOW PULSE 1.5V tW HIGH-LOW-HIGH PULSE 1.5V 3V 1.5V 0V tH 2534 drw 06 2534 drw 05 PROPAGATION DELAY ENABLE AND DISABLE TIMES ENABLE SAME PHASE INPUT TRANSITION tPLH tPHL OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL 3V 1.5V 0V VOH 1.5V VOL DISABLE 3V 1.5V 0V CONTROL INPUT tPZL OUTPUT NORMALLY LOW 3V 1.5V 0V SWITCH CLOSED tPLZ tPZH OUTPUT NORMALLY HIGH 2534 drw 07 SWITCH OPEN 3.5V 3.5V 1.5V 0.3V VOL tPHZ 0.3V 1.5V 0V VOH 0V 2534 drw 08 NOTES: 1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns 6.9 7 IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES ORDERING INFORMATION IDT XX Temperature Range FCT X X X X Family Device Type Package Process Blank B Commercial MIL-STD-883, Class B P D SO L E PY Q Plastic DIP CERDIP Small Outline IC Leadless Chip Carrier CERPACK Shrink Small Outline Package Quarter-size Small Outline Package 245T Non-Inverting Octal Bidirectional Transceiver 640T Inverting Octal Bidirectional Transceiver 645T Non-Inverting Octal Bidirectional Transceiver 245AT 640AT 645AT 245CT 640CT 645CT 245DT 645DT Blank 2 High Drive Balanced Drive 54 74 –55°C to +125°C 0°C to +70°C 2539 drw 09 6.9 8