IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER IDT74FCT645T/AT/CT/DT FEATURES: DESCRIPTION: − − − The IDT octal bidirectional transceivers are built using an advanced dual metal CMOS technology. The FCT645T 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. − − − − Low input and output leakage ≤1µ A (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 Available in SOIC, and SSOP packages Std., A, C and D speed grades High drive outputs (-15mA IOH, 64mA IOL) FUNCTIONAL BLOCK DIAGRAM T/R OE A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 INDUSTRIAL TEMPERATURE RANGE AUGUST 2000 1 c 1999 Integrated Device Technology, Inc. DSC-5512/- IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION T/R 1 20 V CC A0 2 19 OE A1 3 18 B0 A2 4 17 B1 A3 5 16 B2 A4 6 15 B3 SO20-2 SO20-7 Symbol VTERM(2) Rating Terminal Voltage with Respect to GND Max. –0.5 to +7 Unit V VTERM(3) Terminal Voltage with Respect to GND –0.5 to VCC+0.5 V TSTG Storage Temperature –65 to +150 °C IOUT DC Output Current –60 to +120 mA 8T-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 +0.5V unless otherwise noted. 2. Inputs and Vcc terminals only. 3. Outputs and I/O terminals only. 7 14 B4 A6 8 13 B5 A7 9 12 B6 A5 GND 10 11 CAPACITANCE (TA = +25OC, f = 1.0MHz) Symbol CIN Parameter(1) Input Capacitance Conditions VIN = 0V Typ. 6 Max. 10 COUT Output Capacitance VOUT = 0V 8 12 Unit pF pF 8T-link B7 NOTE: 1. This parameter is measured at characterization but not tested. PIN DESCRIPTION SOIC/ SSOP TOP VIEW Pin Names OE Description Output Enable Input (Active LOW) T/R Transmit/Receive Input A0-A7 Side A Inputs or 3-State Outputs B0-B7 Side B Inputs or 3-State Outputs FUNCTION TABLE (1) Inputs OE T/R L L 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 Outputs IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5% Symbol VIH Parameter Input HIGH Level Test Conditions(1) Guaranteed Logic HIGH Level VIL Input LOW Level Guaranteed Logic LOW Level IIH Input HIGH Current(4) VCC = Max. IIL Input LOW Current(4) IOZH High Impedance Output Current IOZL (3-State output pins) (4) — — ±1 II Input HIGH Current VCC = Max., VI = VCC (Max.) — — ±1 µA VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V VH Input Hysteresis ICC Quiescent Power Supply Current VCC = Max. Min. 2 Typ.(2) — Max. — Unit V — — 0.8 V VI = 2.7V — — ±1 µA VI = 0.5V — — ±1 VO = 2.7V — — ±1 VO = 0.5V µA — — 200 — mV VCC = Max., VIN = GND or VCC — 0.01 1 µA Min. 2.4 Typ.(2) 3.3 Max. — Unit V OUTPUT DRIVE CHARACTERISTICS Symbol VOH Parameter Output HIGH Voltage VOL Output LOW Voltage IOS Short Circuit Current Test Conditions(1) IOH = –8mA VCC = Min. VIN = VIH or VIL IOH = –15mA 2 3 — VCC = Min. VIN = VIH or VIL VCC = Max, VO = GND (3) IOL = 64mA — 0.3 0.55 V –60 –120 –225 mA 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. The test limit for thie parameter is ±5µA at TA = -55°C. 3 IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol ∆ICC ICCD Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) IC 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. Outputs Open fi = 10MHz 50% Duty Cycle OE = T/R = GND One Bit Toggling VCC = Max. Outputs Open fi = 2.5MHz 50% Duty Cycle OE = T/R = GND Eight Bits Toggling Min. — Typ.(2) 0.5 Max. 2 Unit mA VIN = VCC VIN = GND — 0.15 0.25 mA/ MHz VIN = VCC VIN = GND — 1.5 3.5 mA VIN = 3.4 VIN = GND — 1.8 4.5 VIN = VCC VIN = GND — 3 6(5) VIN = 3.4 VIN = GND — 5 14(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. SWITCHING CHARACTRISTICS OVER OPERATING RANGE FCT645T 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) Min.(2) CL = 50 pF RL = 500Ω FCT645AT 1.5 Max. 9.5 Min.(2) 1.5 FCT645CT FCT645DT 1.5 Max. 4.6 Min. 1.5 Max. 4.1 Min.(2) 1.5 Max. 3.8 Unit ns 11 1.5 6.2 1.5 5.8 1.5 5 ns 1.5 12 1.5 5 1.5 4.8 1.5 4.3 ns 1.5 11 1.5 6.2 1.5 5.8 1.5 5 ns 1.5 12 1.5 5 1.5 4.8 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. 4 (2) IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS SWITCH POSITION TEST CIRCUITS FOR ALL OUTPUTS V CC Test 7.0V Switch Open Drain Disable Low 500 Ω V OUT V IN Pulse Generator Enable Low All Other Tests D.U.T. 50pF R Closed T C Open 8-link DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. 500 Ω 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 DisableHIGH 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns 5 IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX Temperature Range FCT X X Device Type Package SO PY Small Outline IC (SO20-2) Shrink Small Outline Package (SO20-7) 645T 645AT 645CT 645DT Octal Bidirectional Transceiver 74 CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 - 40°C to +85°C 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. 6