IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER FEATURES: • • • • • • • • • • • • IDT54/74FCT245/A/C DESCRIPTION: IDT54FCT245 equivalent to FAST™ 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) µA max. Current levels only 5µ 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 B0 3 A1 17 B1 A2 4 16 B2 A3 5 15 B3 6 A4 14 B4 A5 7 13 A6 B5 8 12 B6 A7 9 11 The IDT logo is a registered trademark of Integrated Device Technology, Inc. MILITARY AND COMMERCIAL TEMPERATURE RANGES B7 JUNE 2002 1 © 2002 Integrated Device Technology, Inc. DSC-5421/1 IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES 3 18 B0 A2 4 17 B1 A2 A3 5 16 B2 A3 A4 6 15 B3 A5 7 14 B4 A6 8 13 B5 A7 9 12 B6 10 11 B7 GND 3 2 1 VTERM(2) Terminal Voltage B0 5 17 B1 A4 6 16 B2 A5 7 15 B3 A6 8 14 B4 9 10 11 12 Terminal Voltage Military Unit –0.5 to +7 –0.5 to +7 V –0.5 to VCC –0.5 to VCC V Pin Names OE T/R A0 - A7 B0 - B7 with Respect to GND TA Operating Temperature 0 to +70 –55 to +125 °C TBIAS Temperature under BIAS –55 to +125 –65 to +135 °C TSTG Storage Temperature –55 to +125 –65 to +150 °C PT Power Dissipation 0.5 0.5 W IOUT DC Output Current 120 120 mA Inputs Conditions Typ. Max. Unit CIN Input Capacitance VIN = 0V 6 10 pF CI/O I/O Capacitance VOUT = 0V 8 12 pF OE T/R Outputs L L L H Bus B Data to Bus A Bus A Data to Bus B H X High Z State NOTE: 1. H = HIGH Voltage Level X = Don’t Care L = LOW Voltage Level CAPACITANCE (TA = +25°C, F = 1.0MHz) Parameter(1) 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) 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. Symbol 13 PIN DESCRIPTION Commercial with Respect to GND VTERM(3) 19 LCC TOP VIEW ABSOLUTE MAXIMUM RATINGS(1) Rating 20 18 4 CERDIP/ SOIC TOP VIEW Symbol OE A1 B5 OE VCC 19 B6 2 T/R A0 INDEX B7 VCC A0 20 GND 1 A7 T/R A1 PIN CONFIGURATION 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 = 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 VIH Input HIGH Level Guaranteed Logic HIGH Level 2 — — V VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V IIH Input HIGH Current VCC = Max. IIL Input LOW Current IOZH VI = VCC — — 5 VI = 2.7V — — 5(4) VI = 0.5V — — –5(4) VI = GND — — –5 VO = VCC VO = 2.7V VO = 0.5V VO = GND — — — — –0.7 15 15(4) –15(4) –15 –1.2 VCC = Max. IOZL Off State (High Impedance) Output Current VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — — — — — IOS Short Circuit Current VCC = Max., VO = GND(3) –60 –120 — VOH Output HIGH Voltage VCC = 3V, VIN = VLC or VHC, IOH = –32µA VCC = Min IOH = –300µA VIN = VIH or VIL IOH = –12mA MIL IOH = –15mA COM'L VCC = 3V, VIN = VLC or VHC, IOL = 300µA VCC = Min IOL = 300µA VIN = VIH or VIL IOL = 32mA MIL IOL = 48mA COM'L VHC VHC 2.4 2.4 — — — — VCC VCC 4.3 4.3 GND GND 0.3 0.3 — — — — VLC VLC(4) 0.55 0.55 VOL Output LOW Voltage 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, +25°C 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 µA µA V mA V V IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC - 0.2V Min. Typ.(2) Max. Unit VCC = Max. VIN ≥ VHC; VIN ≤ VLC — 0.2 1.5 mA Quiescent Power Supply Current TTL Inputs HIGH VCC = Max. VIN = 3.4V(3) — 0.5 2 mA 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 Total Power Supply Current(6) VCC = Max. Outputs Open fI = 10MHz VIN ≥ VHC VIN ≤ VLC (FCT) — 2 4 mA 50% Duty Cycle T/R = OE = GND VIN = 3.4V VIN = GND — 2.3 5 VCC = Max. Outputs Open fI = 2.5MHz VIN ≥ VHC VIN ≤ VLC (FCT) — 3.5 6.5(5) 50% Duty Cycle T/R = OE = GND VIN = 3.4V VIN = GND — 5.5 14.5(5) Symbol Parameter ICC Quiescent Power Supply Current ∆ICC ICCD IC Test Conditions(1) One Bit Toggling 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, +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 ∆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. 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 = 500Ω 54FCT245 Mil. Min.(2) Max. 1.5 7.5 54/74FCT245A Com'l. Mil. Min.(2) Max. Min.(2) Max. 1.5 4.6 1.5 4.9 74FCT245C Com'l. Min.(2) Max. 1.5 4.1 Unit ns 1.5 10 1.5 6.2 1.5 6.5 1.5 5.8 ns 1.5 10 1.5 5 1.5 6 1.5 4.8 ns 1.5 10 1.5 6.2 1.5 6.5 1.5 5.8 ns 1.5 10 1.5 5 1.5 6 1.5 4.8 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 SWITCH POSITION 7.0V 500Ω V OUT VIN Pulse Generator D.U.T . 50pF RT 500Ω CL Test Switch Open Drain Disable Low Enable Low Closed All Other Tests Open 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 tH tSU TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. 3V 1.5V 0V 3V 1.5V 0V tREM tSU LOW-HIGH-LOW PULSE tW 3V 1.5V 0V HIGH-LOW-HIGH PULSE 3V 1.5V 0V tH 1.5V 1.5V Octal link Pulse Width Octal link Set-Up, Hold, and Release 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 OUTPUT NORMALLY HIGH Octal link Propagation Delay SWITCH CLOSED tPZH SWITCH OPEN tPLZ 3.5V 3.5V 1.5V 0.3V VOL tPHZ 0.3V 1.5V 0V Enable and Disable Times VOH 0V Octal link NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; ZO ≤ 50Ω; 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 CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 Blank B Commercial MIL-STD-883, Class B SO Commercial Options Small Outline IC D L Military Options CERDIP Leadless Chip Carrier 245 245A 245C Octal Bidirectional Transceiver 54 74 – 55°C to +125°C 0°C to +70°C for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 7 for Tech Support: [email protected] (408) 654-6459