IDT54/74FCT2245T/AT/CT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER DESCRIPTION: FEATURES: − − − − − − − − − − − IDT54/74FCT2245T/AT/CT Low input and output leakage ≤1µ A (max.) Extended commercial range of –40°C to +85°C CMOS power levels True TTL input and output compatibility • VOH = 3.3V (typ.) • VOL = 0.3V (typ.) 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, SSOP, QSOP, TSSOP, CERPACK, and LCC packages Std., A and C speed grades Resistor outputs (-15mA IOH, 12mA IOL COM’L.) (-12mA IOH, 12mA IOL MIL.) Reduced system switching noise The IDT octal bidirectional transceivers are built using an advanced dual metal CMOS technology. The FCT2245T is designed for asynchronous two-way 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 FCT2245T has balanced drive outputs with current limiting resistors. This offers low ground bounce, minimal undershoot and controlled output fall times- reducing the need for external series terminating resistors. The FCT2245T parts are plug-in replacements for FCT245T parts. FUNCTIONAL BLOCK DIAGRAM T/R OE A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 MILITARY AND COMMERCIAL TEMPERATURE RANGES JANUARY 2000 1 c 1999 Integrated Device Technology, Inc. DSC-5511/- IDT54/74FCT2245T/AT/CT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES A1 3 18 B0 A2 4 17 B1 A3 5 16 B2 A4 6 15 B3 A5 7 14 B4 A6 8 13 B5 A7 9 12 B6 10 11 B7 GND 4 A3 5 A4 6 A5 A6 2 20 19 1 18 B0 17 B1 16 B2 7 15 B3 8 14 B4 L20-2 9 A7 P20-1 D20-1 SO20-2 SO20-7 SO20-8 SO20-9 E20-1 A2 3 OE OE DIP/ SOIC/ SSOP/ QSOP/ TSSOP/ CERPACK TOP VIEW 10 11 12 13 B5 19 V CC 2 B6 A0 INDEX T/R V CC B7 20 A0 1 GND T/R A1 PIN CONFIGURATION LCC TOP VIEW ABSOLUTE MAXIMUM RATINGS(1) PIN DESCRIPTION Pin Names OE Description Output Enable Input (Active LOW) 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 T/R Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs TSTG Storage Temperature –65 to +150 °C A0-A7 IOUT DC Output Current –60 to +120 mA B0-B7 Transmit/Receive Input 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. FUNCTION TABLE Inputs 2. Inputs and Vcc terminals only. 3. Outputs and I/O terminals only. Parameter(1) Input Capacitance Conditions VIN = 0V Typ. 6 Max. 10 COUT Output Capacitance VOUT = 0V 8 12 OE T/R L L Bus B Data to Bus A(1) L H Bus A Data to Bus B(1) H X High Z State NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care CAPACITANCE (TA = +25OC, f = 1.0MHz) Symbol CIN (1) Unit pF pF 8T-link NOTE: 1. This parameter is measured at characterization but not tested. 2 Outputs IDT54/74FCT2245T/AT/CT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Commercial: TA = -40°C to +85°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 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 — — 200 — mV ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 0.01 1 mA Max. Unit mA VCC = Max. Min. 2 Typ.(2) — Max. — Unit V — — 0.8 V µA VI = 2.7V — — ±1 VI = 0.5V — — ±1 VO = 2.7V — — ±1 VO = 0.5V µA OUTPUT DRIVE CHARACTERISTICS Symbol IODL Parameter Output LOW Current Test Conditions(1) VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3) Min. 16 Typ.(2) 48 IODH Output HIGH Current VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3) –16 –48 VOH Output HIGH Voltage 2.4 3.3 — V VOL Output LOW Voltage VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or VIL — 0.3 0.5 V IOH = –12mA MIL. IOH = –15mA COM’L. IOL = 12mA 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. 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 this parameter is ±5µA at TA = -55°C. 3 mA IDT54/74FCT2245T/AT/CT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES 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 — 0.06 0.12 mA/ MHz VIN = VCC VIN = GND — 0.6 2.2 mA 0.9 3.2 VIN = 3.4 VIN = GND VIN = VCC VIN = GND — 1.2 3.4(5) VIN = 3.4 VIN = GND — 3.2 11.4(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 IDT54/74FCT2245T/AT/CT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS OVER OPERATING RANGE-COMMERCIAL(1) FCT2245T 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) Min.(2) CL = 50 pF RL = 500Ω FCT2245AT Max. Min.(2) 1.5 7 1.5 FCT2245CT Max. Min.(2) Max. Unit 1.5 4.6 1.5 4.1 ns 9.5 1.5 6.2 1.5 5.8 ns 1.5 7.5 1.5 5 1.5 4.8 ns 1.5 9.5 1.5 6.2 1.5 5.8 ns 1.5 7.5 1.5 5 1.5 4.8 ns SWITCHING CHARACTERISTICS OVER OPERATING RANGE - MILITARY (1) FCT2245T 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 = 50 pF RL = 500Ω FCT2245AT FCT2245CT Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit 1.5 7.5 1.5 4.9 1.5 4.5 ns 1.5 10 1.5 6.5 1.5 6.2 ns 1.5 10 1.5 6 1.5 5.2 ns 1.5 10 1.5 6.5 1.5 6.2 ns 1.5 10 1.5 6 1.5 5.2 ns NOTES: 1. See Test Circuit and Waveforms. 2. Miminum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not tested. 5 IDT54/74FCT2245T/AT/CT 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 DisableHIGH 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns 6 IDT54/74FCT2245T/AT/CT FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES ORDERING INFORMATION ID T XX XXXX FC T Tem p. R ange D evice Type X Package X Process Blank B C om m ercial M IL-STD -883, C lass B P D SO PY Q PG E L Plastic D IP (P20-1) C ER D IP (D 20-1) Sm all Outline IC (SO 20-2) Shrink Sm a ll O utline Package (SO20-7) Quarter-size Sm all O utline Package (SO 20-8) Thin Shrin k Sm all O utline Pa ckage (SO 20-9) C ER PAC K (E20-1) Leadless C hip C arrier (L20-1) 2245T 2245AT 2245C T Octal Bidirectional Transceiver 74 54 CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 - 40°C to +8 5°C - 55°C to +1 25°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. 7