IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER IDT54/74FCT245/A/C FEATURES: DESCRIPTION: − − − − − − − − − − 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. − − IDT54/74FCT245 equivalent to FAST™ speed IDT54/74FCT245A 25% faster than FAST IDT54/74FCT245C 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 typ. static) Direction control and over-riding 3-state control Military product compliant to MIL-STD-883, Class B and DESC listed Meets or exceeds JEDEC Standard 18 specifications Available in the following packages: • Commercial: SOIC • Military: CERDIP, LCC, CERPACK 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 MILITARY AND COMMERCIAL TEMPERATURE RANGES B7 JUNE 2001 1 c 2001 Integrated Device Technology, Inc. DSC-5421/- IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES 3 18 B0 A2 4 A3 5 A4 6 A5 17 B1 16 B2 15 B3 7 14 B4 A6 8 13 B5 A7 9 12 B6 10 11 B7 GND D20-1 SO20-2 E20-1 A2 4 A3 5 A4 6 A5 7 A6 8 3 2 OE A1 INDEX 20 19 1 L20-2 9 10 11 12 13 B5 OE V CC 19 B6 2 T/R A0 B7 V CC A0 20 GND 1 A7 T/R A1 PIN CONFIGURATION 18 B0 17 B1 16 B2 15 B3 14 B4 LCC TOP VIEW DIP/ SOIC/ CERPACK TOP VIEW ABSOLUTE MAXIMUM RATINGS(1) PIN DESCRIPTION Rating Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Operating Temperature Commercial –0.5 to +7 Military –0.5 to +7 Unit V Pin Names OE –0.5 to VCC –0.5 to VCC V A0-A7 Side A Inputs or 3-State Outputs 0 to +70 –55 to +125 °C B0-B7 Side B Inputs or 3-State Outputs –55 to +125 –65 to +135 °C TSTG Temperature Under Bias Storage Temperature –55 to +125 –65 to +150 °C PT Power Dissipation 0.5 0.5 W Symbol VTERM(2) VTERM(3) TA TBIAS IOUT DC Output Current Description Output Enable Input (Active LOW) T/R 120 120 FUNCTION TABLE (1) Inputs mA 8-link 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 +.5V unless otherwise noted. 3. Outputs and I/O terminals only. CAPACITANCE (TA = +25OC, f = 1.0MHz) Parameter(1) Input Capacitance Conditions VIN = 0V Typ. 6 Max. 10 Unit pF CI/O I/O Capacitance VOUT = 0V 8 12 pF OE T/R L L Outputs Bus B Data to Bus A L H Bus A Data to Bus B H X High Z State NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care 2. Input and VCC terminals only. Symbol CIN Transmit/Receive Input 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 VIH Parameter Input HIGH Level Test Conditions(1) Guaranteed Logic HIGH Level VIL Input LOW Level Guaranteed Logic LOW Level II H Input HIGH Current VCC = Max. II L II L Typ.(2) — Max. — Unit V — — 0.8 V µA VI = VCC — — 5 (Except I/O pins) VI = 2.7V — — 5(4) Input LOW Current VI = 0.5V — — –5(4) VI = GND — — –5 VI = VCC — — 15 (Except I/O pins) II H Min. 2 Input HIGH Current VCC = Max. (I/O pins only) VI = 2.7V — — 15(4) Input LOW Current VI = 0.5V — — –15(4) VI = GND (I/O pins only) µA — — –15 Clamp Diode Voltage VCC = Min., IN = –18mA — –0.7 –1.2 V IOS Short Circuit Current VCC = Max.(3), VO = GND –60 –120 — mA VOH Output HIGH Voltage V VIK VOL Output LOW Voltage (Port A and Port B) VCC = 3V, VIN = VLC or VHC, IOH = –32µ A VHC VCC — VCC = Min. IOH = –300µ A VHC VCC — VIN = VIH or VIL IOH = –12mA MIL. 2.4 4.3 — IOH = –15mA COM'L. 2.4 4.3 — — GND VLC VCC = 3V, VIN = VLC or VHC, IOL = 300µ A VCC = Min. IOL = 300µ A — GND VLC(4) 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. 3 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 Symbol ICC Parameter Quiescent Power Supply Current ∆ICC ICCD Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) IC Total Power Supply Current (6) Test Conditions(1) VCC = Max. VIN ≥ VHC; VIN ≤ VLC VCC = Max. VIN = 3.4V(3) VIN ≥ VHC VCC = Max. Outputs Open VIN ≤ VLC OE = GND T/R = GND or VCC One Input Toggling 50% Duty Cycle VIN ≥ VHC VCC = Max. Outputs Open VIN ≤ VLC fi = 10MHz (FCT) 50% Duty Cycle VIN = 3.4V T/R = OE = GND VIN = GND One Bit Toggling VIN ≥ VHC VCC = Max. Outputs Open VIN ≤ VLC fi = 2.5MHz (FCT) 50% Duty Cycle VIN = 3.4V T/R = OE = GND VIN = GND Eight Bits Toggling Min. — Typ.(2) 0.5 Max. 1.5 Unit mA — 0.5 2 mA — 0.15 0.25 mA/MHz — 2 4 mA — 2.3 5 — 3.5 6.5(5) — 5.5 14.5(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 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 54/74FCT245 Com’l. Symbol tPLH tPHL Parameter Propagation Delay A to B, B to A Condition(1) CL = 50 pF RL = 500Ω Min.(2) Max. 1.5 7 54/74FCT245A Mil. Com’l. Min.(2) Max. 1.5 7.5 Min.(2) Max. 1.5 4.6 54/74FCT245C Mil. Com’l. Min.(2) Max. 1.5 4.9 Min.(2) 1.5 Mil. Max. Min.(2) Max. 4.1 1.5 4.5 Unit ns tPZH tPZL Output Enable Time OE to A or B 1.5 9.5 1.5 10 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 1.5 5 1.5 6 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 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 1.5 5 1.5 6 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. 5 IDT54/74FCT245/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES TEST CIRCUITS AND WAVEFORMS SWITCH POSITION TEST CIRCUITS FOR ALL OUTPUTS V CC Test 7.0V Switch Open Drain 500 Ω Disable Low V OUT V IN Pulse Generator D.U.T. All Other Tests 50pF R Closed Enable Low T C Open 8-link 500 Ω DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. L O ctal lin k PULSE WIDTH SET-UP, HOLD, AND RELEASE TIMES 3V 1.5V 0V 3V 1.5V 0V DATA INPUT tH t SU TIM ING INPUT ASYNCHRONOUS C ONTROL PRES ET CLEAR ETC. SYNCHRO NOUS CONTRO L PRES ET CLEAR CLOCK ENABLE ETC. t REM t SU LO W -HIGH-LOW PULSE 1.5V tW 3V 1.5V 0V HIGH-LOW -HIGH PULSE 1.5V 3V 1.5V 0V tH O ctal lin k O ctal lin k PROPAGATION DELAY ENABLE AND DISABLE TIMES ENAB LE SAM E PHASE INPUT TRANSITION t PLH t PH L OUTPUT t PLH OPPOSITE P HASE INPUT TRANSITION t PH L 3V 1.5V 0V DISA BLE 3V CO NTROL INPUT 1.5V t PZL V OH 1.5V V OL OUTPUT NO RM A LLY LO W 3V 1.5V 0V SW ITCH CLOSE D O ctal lin k SW ITCH OPEN 3.5V 3.5V 1.5V 0.3V t PZH OUTPUT NO RM A LLY HIGH 0V t PLZ V OL t PHZ 0.3V V OH 1.5V 0V 0V O ctal lin k 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 IDT XX Tem p. Range FCT XXXX XX X Device Type Package Process Blank B Com mercial MIL-STD-883, Class B SO Com mercial Options Small Outline IC (SO20-2) D E L Military Options CERDIP (D20-1) CERPACK (E20-1) Leadless Chip Carrier (L20-2) 245 245A 245C Octal Bidirectional Transceiver 54 74 – 55°C to +125°C 0°C to +70°C 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* *To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2. The IDT logo is a registered trademark of Integrated Device Technology, Inc. 7