IDT54/74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) MILITARY AND COMMERCIAL TEMPERATURE RANGES IDT54/74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) Integrated Device Technology, Inc. FEATURES: DESCRIPTION: • • • • The IDT54/74FCT621T/AT is an octal transceiver with non-inverting Open-Drain bus compatible outputs in both send and receive directions. The B bus outputs are capable of sinking 64mA providing very good capacitive drive characteristics. These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control function implementation allows for maximum flexibility in timing. • • • • • Std. and A speed grades Low input and output leakage ≤1µA (max.) CMOS power levels True TTL input and output compatibility – VOH = 3.3V (typ.) – VOL = 0.3V (typ.) Power off disable outputs permit “live insertion” 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, CERPACK and LCC packages FUNCTIONAL BLOCK DIAGRAM (1) PIN CONFIGURATIONS GAB A1 A2 A3 A4 A5 A6 A7 A8 GND GBA GAB B1 A1 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 GBA B1 B2 B3 B4 B5 B6 B7 B8 2538 drw 02 A2 A1 GAB Vcc GBA DIP/SOIC/CERPACK TOP VIEW INDEX 3 A3 A4 A5 A6 A7 B 2 –B 8 A 2 –A 8 2538 drw 01 2 1 20 19 18 5 6 17 L20-2 16 7 15 8 14 9 10 11 12 13 A8 GND B8 B7 B6 7 Other Transceivers 4 B1 B2 B3 B4 B5 2538 drw 03 LCC TOP VIEW The IDT logo is a registered trademark of Integreted Device Technology, Inc. MILITARY AND COMMERCIAL TEMPERATURE RANGES 1995 Integrated Device Technology, Inc. 6.18 6.18 APRIL 1994 DSC-4222/4 1 1 IDT54/74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) MILITARY AND COMMERCIAL TEMPERATURE RANGES FUNCTION TABLE(1) PIN DESCRIPTION Pin Names GBA, GAB Description GBA Enable Inputs A1 – A 8 A Inputs or Open-drain Outputs B1 – B 8 B Inputs or Open-drain Outputs L H H L 2538 tbl 01 Enable Inputs GAB L H L H Function B data to A bus A data to B bus OFF B data to A bus A data to B bus NOTE: 2538 tbl 02 1. H = HIGH Voltage Level. L = LOW Voltage Level. OFF = HIGH if pull-up resistor is connected to Open-Drain output. ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating Commercial (2) VTERM 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 I OUT DC Output Current –60 to +120 CAPACITANCE (TA = +25°C, f = 1.0MHz) 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 –60 to +120 mA Symbol Parameter(1) CIN Input Capacitance COUT Output Capacitance Conditions VIN = 0V Typ. 6 VOUT = 0V 8 Max. Unit 10 pF 12 pF 2538 lnk 04 NOTE: 1. This parameter is measured at characterization but not tested. 2538 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. 6.18 2 IDT54/74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) 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 Test Conditions(1) Parameter Min. Typ.(2) Max. Unit 2.0 — — V VIH Input HIGH Level VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V IIH Input HIGH Current(5) VCC = Max., VI = 2.7V — — ±1 µA IIL Input LOW Current(5) VCC = Max., VI = 0.5V — — ±1 µA VCC = Max., VI = VCC (Max.) — — ±1 µA VCC = Min., IN= –18mA — –0.7 –1.2 V VOH = Vcc (Max.) — — 20 µA IOL = 48mA MIL.(4) — 0.3 0.55 V — 0.3 0.5 V — — ±1 µA — 200 — mV — 0.01 1 mA Guaranteed Logic HIGH Level (5) II Input HIGH Current VIK Clamp Diode Voltage IOH Output HIGH Current VCC = Max. VIN = VIH or VIL VOL Output LOW Voltage (B Bus) VIN = VIH or VIL IOL = 64mA COM’L. VOL Output LOW Voltage VCC = Min. IOL = 32mA MIL.(4) (A Bus) VIN = VIH or VIL IOL = 48mA COM’L. Input/Output Power Off VCC = 0V, VIN or VO ≤ 4.5V IOFF VCC = Min. Leakage(5) VH Input Hysteresis ICC Quiescent Power Supply — VCC = max., VIN = GND or Vcc Current NOTES: 2538 tbl 05 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. These are maximum IOL values per output, for 8 outputs turned on simultaneously. Total maximum IOL (all outputs) is 512mA for commercial and 384mA for military. Derate IOL for number of outputs exceeding 8 turned on simultaneously. 4. The test limit for this parameter is ±5µA at TA = –55°C. 5. This parameter is guaranteed but not tested. 6.18 3 IDT54/74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) MILITARY AND COMMERCIAL TEMPERATURE RANGES POWER SUPPLY CHARACTERISTICS Symbol Test Conditions(1) Parameter Min. Typ.(2) Max. Unit — 0.5 2.0 mA ∆ICC Quiescent Power Supply Current TTL Inputs HIGH VCC = Max. VIN = 3.4V(3) ICCD Dynamic Power Supply Current(4) Vcc = Max. Outputs Open GBA = GAB = GND or VCC One Input Toggling 50% Duty Cycle VIN = VCC VIN = GND — 0.15 0.25 mA/MHz IC Total Power Supply Current(6,7) Vcc = Max. Outputs Open GBA = GAB = GND or VCC One Bit Toggling at fi =10MHz 50% Duty Cycle VIN = VCC VIN = GND — 1.5 3.5 mA VIN = 3.4V VIN = GND — 1.8 4.5 Vcc = Max. Outputs Open GBA = GAB = GND or VCC Eight Bits Toggling at fi = 2.5MHz 50% Duty Cycle VIN = VCC VIN = GND — 3.0 6.0(5) VIN = 3.4V VIN = GND — 5.0 14.0(5) 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. This test is performed with outputs tied to GND through a pull-down resistor. 2538 tbl 06 SWITCHING CHARACTERISTICS OVER OPERATING RANGE IDT54/74FCT621T Com’l. Symbol tPLH Parameter Propagation Delay A to B tPHL tPLH tPHL tPLH (1) Condition Max. Min. (2) Com’l. Max. Min. (2) Mil. Max. Min. (2) Max. Unit CL = 50pF 5.5 13.0 5.5 13.5 5.5 12.0 5.5 12.5 RL = 500Ω 1.5 8.5 1.5 9.5 1.5 6.8 1.5 7.6 5.5 12.5 5.5 13.0 5.5 12.0 5.5 12.5 1.5 8.0 1.5 9.0 1.5 6.4 1.5 7.2 5.5 14.0 5.5 14.5 5.5 13.0 5.5 13.5 Propagation Delay B to A Propagation Delay GBA to A tPHL tPLH Min. (2) IDT54/74FCT621AT Mil. Propagation Delay GAB to B tPHL 1.5 8.5 1.5 9.5 1.5 6.8 1.5 7.6 5.5 14.0 5.5 14.5 5.5 13.0 5.5 13.5 1.5 8.0 1.5 9.0 1.5 6.4 1.5 7.2 ns ns ns ns 2538 tbl 07 NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 6.18 4 IDT54/74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) MILITARY AND COMMERCIAL TEMPERATURE RANGES TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS SWITCH POSITION V CC 7.0V 500Ω Switch Open Drain Disable Low Closed Enable Low V OUT VIN Pulse Generator Test Open All Other Tests D.U.T. 50pF RT 2538 lnk 08 DEFINITIONS: CL= Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. 500Ω CL 2538 drw 03 SET-UP, HOLD AND RELEASE TIMES DATA INPUT tH tSU TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. tREM tSU PULSE WIDTH 3V 1.5V 0V 3V 1.5V 0V LOW-HIGH-LOW PULSE 1.5V tW 3V 1.5V 0V HIGH-LOW-HIGH PULSE 1.5V 3V 1.5V 0V tH 2538 drw 05 2538 drw 04 PROPAGATION DELAY ENABLE AND DISABLE TIMES ENABLE SAME PHASE INPUT TRANSITION tPLH tPHL OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL 3V 1.5V 0V DISABLE 3V CONTROL INPUT tPLZ tPZL VOH 1.5V VOL OUTPUT NORMALLY LOW 3V 1.5V 0V SWITCH CLOSED 3.5V 1.5V tPZH OUTPUT NORMALLY HIGH 2538 drw 06 SWITCH OPEN 1.5V 0V 3.5V 0.3V VOL tPHZ 0.3V 1.5V 0V VOH 0V 2538 drw 07 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 6.18 5 IDT54/74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) MILITARY AND COMMERCIAL TEMPERATURE RANGES ORDERING INFORMATION IDT XX FCT Temperature Range X Family X X DeviceType Package X Process Blank B Commercial MIL-STD-883, Class B P D SO L E Plastic DIP CERDIP Small Outline IC Leadless Chip Carrier CERPACK 621T 621AT Octal Bus Transceiver Blank High Drive 54 74 –55°C to +125°C 0°C to +70°C 2538 drw 08 6.18 6