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| IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER FEATURES: - - - - - - - Low input and output leakage 1 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) IDT74FCT645T/AT/CT/DT 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. 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 1 c 1999 Integrated Device Technology, Inc. AUGUST 2000 DSC-5512/- IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS(1) Symbol VTERM(2) Rating Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Storage Temperature DC Output Current Max. -0.5 to +7 -0.5 to VCC+0.5 -65 to +150 -60 to +120 Unit V V C mA 8T-link T/R A0 A1 A2 A3 A4 A5 A6 A7 GND 1 2 3 4 5 6 7 8 9 10 SO20-2 SO20-7 20 19 18 17 16 15 14 13 12 11 VCC OE B0 B1 B2 B3 B4 B5 B6 B7 VTERM(3) TSTG IOUT 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. CAPACITANCE (TA = +25OC, f = 1.0MHz) Symbol CIN COUT Parameter(1) Input Capacitance Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 6 8 Max. 10 12 Unit pF pF 8T-link NOTE: 1. This parameter is measured at characterization but not tested. PIN DESCRIPTION SOIC/ SSOP TOP VIEW Pin Names OE T/R A0-A7 B0-B7 Description Output Enable Input (Active LOW) Transmit/Receive Input Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs FUNCTION TABLE Inputs OE L L H T/R L H X (1) Outputs Bus B Data to Bus A Bus A Data to Bus B High Z State NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care 2 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 = -40C to +85C, VCC = 5.0V 5% Symbol VIH VIL IIH IIL IOZH IOZL II VIK VH ICC Parameter Input HIGH Level Input LOW Level Input HIGH Current(4) Input LOW Current(4) High Impedance Output Current (3-State output pins) (4) Input HIGH Current Clamp Diode Voltage Input Hysteresis Quiescent Power Supply Current VCC = Max., VI = VCC (Max.) VCC = Min., IIN = -18mA -- VCC = Max., VIN = GND or VCC VCC = Max. Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VI = 2.7V VI = 0.5V VO = 2.7V VO = 0.5V Min. 2 -- -- -- -- -- -- -- -- -- Typ.(2) -- -- -- -- -- -- -- -0.7 200 0.01 Max. -- 0.8 1 1 1 1 1 -1.2 -- 1 A V mV A A Unit V V A OUTPUT DRIVE CHARACTERISTICS Symbol VOH VOL IOS Parameter Output HIGH Voltage Output LOW Voltage Short Circuit Current VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or VIL VCC = Max, VO = GND (3) Test Conditions(1) IOH = -8mA IOH = -15mA IOL = 64mA Min. 2.4 2 -- -60 Typ.(2) 3.3 3 0.3 -120 Max. -- -- 0.55 -225 V mA Unit V 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, +25C 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 5A at TA = -55C. 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) 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 0.15 Max. 2 0.25 Unit mA mA/ MHz VIN = VCC VIN = GND IC Total Power Supply Current(6) VIN = VCC VIN = GND VIN = 3.4 VIN = GND VIN = VCC VIN = GND VIN = 3.4 VIN = GND -- 1.5 3.5 mA -- 1.8 4.5 -- 3 6(5) -- 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, +25C 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) CL = 50 pF RL = 500 Min.(2) 1.5 1.5 1.5 1.5 1.5 Max. 9.5 11 12 11 12 FCT645AT Min.(2) 1.5 1.5 1.5 1.5 1.5 Max. 4.6 6.2 5 6.2 5 FCT645CT Min.(2) 1.5 1.5 1.5 1.5 1.5 Max. 4.1 5.8 4.8 5.8 4.8 FCT645DT Min.(2) 1.5 1.5 1.5 1.5 1.5 Max. 3.8 5 4.3 5 4.3 Unit ns ns ns ns 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 IDT74FCT645T/AT/CT/DT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS V CC 7.0V 500 V IN Pulse Generator D.U.T. 50pF R T SWITCH POSITION Test Open Drain Disable Low Enable Low All Other Tests Open 8-link Switch Closed V OUT 500 C L DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. O ctal lin k SET-UP, HOLD, AND RELEASE TIMES DATA INPUT tSU TIM ING INPUT ASYNCHRONOUS C ONTROL PRES ET CLEAR ETC. SYNCHRO NOUS CONTRO L PRES ET CLEAR CLOCK ENABLE ETC. tREM tH 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V O ctal lin k PULSE WIDTH LO W -HIGH-LOW PULSE tW HIGH-LOW -HIGH PULSE O ctal lin k 1.5V 1.5V tSU tH PROPAGATION DELAY SAM E PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE P HASE INPUT TRANSITION tPHL tPHL 3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V O ctal lin k ENABLE AND DISABLE TIMES ENAB LE DISA BLE 3V CO NTROL INPUT tPZL OUTPUT NO RM A LLY LO W SW ITCH CLOSE D tPZH OUTPUT NO RM A LLY HIGH SW ITCH OPEN 3.5V 1.5V 0.3V tPHZ 0.3V 1.5V 0V 0V O ctal lin k 1.5V tPLZ 0V 3.5V VOL VOH 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 FCT X Device Type X Package Temperature Range SO PY Small Outline IC (SO20-2) Shrink Small Outline Package (SO20-7) 645T 645AT 645CT 645DT Octal Bidirectional Transceiver 74 - 40C to +85C 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. 6 |
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