Integrated Device Technology, Inc. FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS IDT54/74FCT16245T/AT/CT/ET IDT54/74FCT162245T/AT/CT/ET IDT54/74FCT166245T/AT/CT IDT54/74FCT162H245T/AT/CT/ET FEATURES: DESCRIPTION: • Common features: – 0.5 MICRON CMOS Technology – High-speed, low-power CMOS replacement for ABT functions – Typical tSK(o) (Output Skew) < 250ps – Low input and output leakage ≤ 1µA (max.) – ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) – Packages include 25 mil pitch SSOP, 19.6 mil pitch TSSOP, 15.7 mil pitch TVSOP and 25 mil pitch Cerpack – Extended commercial range of -40°C to +85°C • Features for FCT16245T/AT/CT/ET: – High drive outputs (-32mA IOH, 64mA IOL) – Power off disable outputs permit “live insertion” – Typical VOLP (Output Ground Bounce) < 1.0V at VCC = 5V, TA = 25°C • Features for FCT162245T/AT/CT/ET: – Balanced Output Drivers: ±24mA (commercial), ±16mA (military) – Reduced system switching noise – Typical VOLP (Output Ground Bounce) < 0.6V at VCC = 5V,TA = 25°C The 16-bit transceivers are built using advanced dual metal CMOS technology. These high-speed, low-power transceivers are ideal for synchronous communication between two busses (A and B). The Direction and Output Enable controls operate these devices as either two independent 8-bit transceivers or one 16-bit transceiver. The direction control pin (xDIR) controls the direction of data flow. The output enable pin (xOE) overrides the direction control and disables both ports. All inputs are designed with hysteresis for improved noise margin. The FCT16245T are ideally suited for driving high-capacitance loads and low-impedance backplanes. The output buffers are designed with power off disable capability to allow "live insertion" of boards when used as backplane drivers. The FCT162245T have balanced output drive 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 FCT162245T are plug-in replacements for the FCT16245T and ABT16245 for on-board interface applications. The FCT166245T are suited for very low noise, point-topoint driving where there is a single receiver, or a light lumped FUNCTIONAL BLOCK DIAGRAM 1 DIR 2 DIR 2OE 1OE 2A1 1A1 1B1 2B1 1A2 2A2 1B2 2B2 1A3 2A3 2B3 1B3 1A4 2A4 2B4 1B4 1A5 2A5 2B5 1B5 1A6 2A6 2B6 1B6 1A7 2A7 1B7 2B7 1A8 2A8 1B8 2B8 2545 drw 02 2545 drw 01 The IDT logo is a registered trademark of Integrated Device Technology, Inc. MILITARY AND COMMERCIAL TEMPERATURE RANGES 1996 Integrated Device Technology, Inc. 5.3 AUGUST 1996 DSC-2545/9 1 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES FEATURES: (Cont'd.) DESCRIPTION: (Cont'd.) • Features for FCT166245T/AT/CT: – Light Drive A Port: ±8mA (commercial), ±6mA (military) – High Drive B Port: +64mA, –32mA (commercial), +48mA, –24mA (military) – Minimal system switching noise – Typical VOLP (Output Ground Bounce) < 0.25V at VCC = 5V,TA = 25°C (A Port Switching) • Features for FCT162H245T/AT/CT/ET: – Bus Hold retains last active bus state during 3-state – Eliminates the need for external pull up resistors load (<100pF). The buffers are designed to limit the output current to levels which will avoid noise and ringing on the signal lines without using external series terminating resistors. These parts have a ±8mA driver on the "A" Port and a +64/–32mA driver on the "B" Port, making them ideal for interfacing noisy system busses to noise sensitive interfaces. The FCT162H245T have "Bus Hold" which retains the input's last state whenever the input goes to high impedance. This prevents "floating" inputs and eliminates the need for pull-up/down resistors. PIN CONFIGURATIONS 1DIR 1 48 1OE 1A1 1B1 2 47 1A1 46 1A2 1B2 3 46 1A2 4 45 GND GND 4 45 GND 1B3 5 44 1A3 1B3 5 44 1A3 1B4 6 43 1A4 1B4 6 43 1A4 VCC 7 42 VCC VCC 7 42 VCC 1B5 8 41 1A5 1B5 8 41 1A5 1B6 9 40 1A6 1B6 9 40 1A6 GND 10 39 GND GND 10 39 GND 1B7 11 38 1A7 1B7 11 38 1A7 1B8 12 1A8 1B8 12 37 1A8 2B1 13 SO48-1 37 SO48-2 SO48-3 36 2A1 2B1 13 36 2A1 2B2 14 35 2A2 2B2 14 35 2A2 GND 15 34 GND GND 15 34 GND 2B3 16 33 2A3 2B3 16 33 2A3 2B4 17 32 2A4 2B4 17 32 2A4 VCC 18 31 VCC VCC 18 31 VCC 2B5 19 30 2A5 2B5 19 30 2A5 2B6 20 29 2A6 2B6 20 29 2A6 GND 21 28 GND GND 21 28 GND 2B7 22 27 2A7 2B7 22 27 2A7 2B8 23 26 2A8 2B8 23 26 2A8 2DIR 24 25 2OE 2DIR 24 25 2OE 1DIR 1 48 1OE 1B1 2 47 1B2 3 GND E48-1 2545 drw 03 2545 drw 04 SSOP/ TSSOP/TVSOP TOP VIEW CERPACK TOP VIEW 5.3 2 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES FUNCTION TABLE(1) PIN DESCRIPTION Pin Names xOE Inputs Description Output Enable Input (Active LOW) xOE xDIR Outputs Direction Control Input L L Bus B Data to Bus A xAx Side A Inputs or 3-State Outputs(1,2) L H Bus A Data to Bus B xBx Side B Inputs or 3-State Outputs(1,3) H X High Z State xDIR NOTES: 1. On FCT162H245T these pins have “Bus Hold”. All other pins are standard inputs, outputs or I/Os. 2. On FCT166245T this is the ±8mA Port. 3. On FCT166245T this is the +64/–32mA Port. NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High Impedance ABSOLUTE MAXIMUM RATINGS(1) CAPACITANCE (TA = +25°C, f = 1.0MHz) 2545 tbl 01 Symbol Description Max. VTERM(2) Terminal Voltage with Respect to –0.5 to +7.0 GND VTERM(3) Terminal Voltage with Respect to –0.5 to GND VCC +0.5 TSTG Storage Temperature –65 to +150 Unit V I OUT mA DC Output Current –60 to +120 Symbol Parameter(1) CIN Input Capacitance CI/O I/O Capacitance V °C 2545 tbl 02 Conditions VIN = 0V Typ. 3.5 VOUT = 0V 3.5 Max. Unit 6.0 pF 8.0 NOTE: 1. This parameter is measured at characterization but not tested. pF 2545 lnk 04 2545 lnk 03 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. 2. All device terminals except FCT162XXXT and FCT166XXXT (A-Port) Output and I/O terminals. 3. Output and I/O terminals for FCT162XXXT and FCT166XXXT (A-Port). 5.3 3 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (STANDARD PARTS) Following Conditions Apply Unless Otherwise Specified: Commercial: TA =–40°C to +85°C, VCC = 5.0V ± 10%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10% Parameter Input HIGH Level Test Conditions(1) Guaranteed Logic HIGH Level VIL Input LOW Level II H Input HIGH Current (Input pins)(5) Symbol VIH Min. 2.0 Typ.(2) — Max. Guaranteed Logic LOW Level — — 0.8 V VCC = Max. — — ±1 µA — — ±1 — — ±1 — — ±1 — — ±1 VI = VCC Input HIGH Current (I/O pins)(5) II L Input LOW Current (Input pins)(5) VI = GND Input LOW Current (I/O pins)(5) I OZH High Impedance Output Current VCC = Max. VO = 2.7V pins) (5) I OZL (3-State Output VIK Clamp Diode Voltage VO = 0.5V VCC = Min., IIN = –18mA I OS Short Circuit Current VCC = Max., VO = VH Input Hysteresis I CCL I CCH I CCZ Quiescent Power Supply Current GND (3) — VCC = Max., VIN = GND or VCC — Unit V µA — — ±1 — –0.7 –1.2 V –80 –140 –225 mA — 100 — mV — 5 500 µA 2545 lnk 05 OUTPUT DRIVE CHARACTERISTICS FOR FCT16245T AND FCT166245T (B-PORT) Symbol IO Parameter Output Drive Current VOH Output HIGH Voltage Test Conditions(1) VCC = Max., VO = 2.5V(3) Min. –50 Typ.(2) — Max. –180 Unit mA VCC = Min. 2.5 3.5 — V 2.4 3.5 — V 2.0 3.0 — V — 0.2 0.55 V — — ±1 I OH = –3mA VIN = VIH or V IL VOL Output LOW Voltage I OFF Input/Output Power Off Leakage(5) VCC = Min. VIN = VIH or V IL VCC = 0V, VIN or V O I OH = –12mA MIL. I OH = –15mA COM'L. I OH = –24mA MIL. I OH = –32mA COM'L.(4) I OL = 48mA MIL. I OL = 64mA COM'L. ≤ 4.5V µA 2545 lnk 06 OUTPUT DRIVE CHARACTERISTICS FOR FCT162245T Symbol I ODL Parameter Output LOW Current Test Conditions(1) VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3) Min. 60 Typ.(2) 115 Max. 200 Unit mA I ODH Output HIGH Current VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3) –60 –115 –200 mA VOH Output HIGH Voltage 2.4 3.3 — V VOL Output LOW Voltage VCC = Min. VIN = VIH or V IL VCC = Min. VIN = VIH or V IL — 0.3 0.55 V I OH = –16mA MIL. I OH = –24mA COM'L. I OL = 16mA MIL. I OL = 24mA COM'L. N O I T 2545 lnk 07 OUTPUT DRIVE CHARACTERISTICS FOR FCT166245T (A-PORT ONLY) MA Symbol I ODL Parameter Output LOW Current Test Conditions(1) VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3) Min. 16 Typ.(2) 48 Max. 96 Unit mA I ODH Output HIGH Current VCC = 5V, VIN = VIH or V IL, VOUT = 1.5V (3) –16 –48 –96 mA VOH Output HIGH Voltage 2.4 3.3 — V VOL Output LOW Voltage VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or V IL — 0.3 0.55 V A V D E C N O F N I R I OH = –6mA MIL. I OH = –8mA COM'L. I OL = 6mA MIL. I OL = 8mA COM'L. 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 tested at one time. Duration of the test should not exceed one second. 4. Duration of the condition can not exceed one second. 5. The test limit for this parameter is ± 5µA at TA = –55°C. A 5.3 2545 lnk 08 4 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (BUS HOLD) Following Conditions Apply Unless Otherwise Specified: Commercial: TA =–40°C to +85°C, VCC = 5.0V ± 10%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10% Symbol VIH Test Conditions(1) Guaranteed Logic HIGH Level Parameter Input HIGH Level VIL Input LOW Level II H Input Standard Input(5) HIGH Current(4) Typ.(2) — Max. — Unit V Guaranteed Logic LOW Level — — 0.8 V VCC = Max. — — ±1 µA Standard I/O(5) — — ±1 Bus Hold Input — — ±100 VI = VCC — — ±100 — — ±1 LOW Standard I/O(5) — — ±1 Current(4) Bus Hold Input — — ±100 Bus Hold I/O — — ±100 VI = 2.0V –50 — — VI = 0.8V +50 — — VO = 2.7V — — ±1 VO = 0.5V — — ±1 — –0.7 –1.2 –80 –140 –225 mA — 100 — mV — 5 500 µA Bus Hold I/O II L Min. 2.0 Input Standard Input(5) I BHH Bus Hold Bus Hold Input I BHL I OZH Sustain Current(4) High Impedance Output Current I OZL (3-State Output pins) (5,6) VIK Clamp Diode Voltage I OS Short Circuit Current VH Input Hysteresis I CCL I CCH I CCZ Quiescent Power Supply Current VI = GND VCC = Min. VCC = Max. VCC = Min., IIN = –18mA VCC = Max., VO = GND(3) — VCC = Max., VIN = GND or VCC 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 tested at one time. Duration of the test should not exceed one second. 4. Pins with Bus Hold are identified in the pin description. 5. The test limit for this parameter is ± 5µA at TA = –55°C. 6. Does not include Bus Hold I/O pins. 5.3 µA µA V 2545 lnk 09 5 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES POWER SUPPLY CHARACTERISTICS Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit — 0.5 1.5 mA ∆ICC Quiescent Power Supply Current TTL Inputs HIGH Vcc = Max. VIN = 3.4V(3) ICCD Dynamic Power Supply Current(4) Vcc = Max. Outputs Open xOE = xDIR = GND One Input Toggling 50% Duty Cycle VIN = VCC VIN = GND — 60 100 µA/ MHz IC Total Power Supply Current(6) Vcc = Max. Outputs Open fi = 10MHz 50% Duty Cycle xOE = xDIR = GND One Bit Toggling VIN = VCC VIN = GND — 0.6 1.5 mA VIN = 3.4V VIN = GND — 0.9 2.3 Vcc = Max. Outputs Open fi = 2.5MHz 50% Duty Cycle xOE = xDIR = GND Sixteen Bits Toggling VIN = VCC VIN = GND — 2.4 4.5(5) VIN = 3.4V VIN = GND — 6.4 16.5(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 (fCPNCP/2 + fiNi) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ∆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) NCP = Number of Clock Inputs at fCP fi = Input Frequency Ni = Number of Inputs at fi 5.3 2545 tbl 10 6 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS OVER OPERATING RANGE FCT16245T/162245T(5) Com'l. Symbol Parameter Condition(1) tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ tSK(o) Propagation Delay A to B, B to A Output Enable Time xOE to A or B Output Disable Time xOE to A or B Output Enable Time xDIR to A or B (4) Output Disable Time xDIR to A or B (4) Output Skew (3) CL = 50pF RL = 500Ω Min.(2) 1.5 FCT16245AT/162245AT(5) Mil. Max. Min.(2) 7.0 1.5 1.5 9.5 1.5 Com'l. Max. Min.(2) 7.5 1.5 1.5 10.0 7.5 1.5 1.5 9.5 1.5 — Mil. Max. Min.(2) Max. Unit 4.6 1.5 4.9 ns 1.5 6.2 1.5 6.5 ns 10.0 1.5 5.0 1.5 6.0 ns 1.5 10.0 1.5 6.2 1.5 6.5 ns 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns 0.5 — 0.5 — 0.5 — 0.5 ns 2545 tbl 11 FCT16245CT/162245CT(5) Com'l. FCT16245ET/162245ET(5) Mil. Com'l. Mil. Symbol Parameter Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ tSK(o) Propagation Delay A to B, B to A Output Enable Time xOE to A or B Output Disable Time xOE to A or B Output Enable Time xDIR to A or B (4) Output Disable Time xDIR to A or B (4) Output Skew (3) CL = 50pF RL = 500Ω 1.5 4.1 1.5 4.5 1.5 3.2 — — ns 1.5 5.8 1.5 6.2 1.5 4.4 — — ns 1.5 4.8 1.5 5.2 1.5 4.0 — — ns 1.5 5.8 1.5 6.2 1.5 4.8 — — ns 1.5 4.8 1.5 5.2 1.5 4.0 — — ns — 0.5 — 0.5 — 0.5 — — ns NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design. 4. This parameter is guaranteed but not tested. 5. Including parts with Bus Hold. 5.3 2545 tbl 12 7 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS OVER OPERATING RANGE Com'l. tPLH tPHL tPLH tPHL tPZH tPZL tPZH tPZL tPHZ tPLZ tPHZ tPLZ tPZH tPZL tPZH tPZL tPHZ tPLZ tPHZ tPLZ tSK(o) Parameter Condition(1) Min.(2) Propagation Delay A to B Propagation Delay B to A Output Enable Time xOE to B Output Enable Time xOE to A Output Disable Time xOE to B Output Disable Time xOE to A Output Enable Time xDIR to B (4) Output Enable Time xDIR to A (4) Output Disable Time xDIR to B (4) Output Disable Time xDIR to A (4) Output Skew (3) CL = 50pF RL = 500Ω 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Mil. Max. Min.(2) 4.6 1.5 7.0 Com'l. Max. Min.(2) FCT166245CT 4.9 1.5 1.5 7.5 6.2 1.5 9.5 Mil. Com'l. Min.(2) Mil. Max. Min.(2) Max. 4.1 1.5 4.5 ns 1.5 4.6 1.5 4.9 ns 6.5 1.5 5.8 1.5 6.2 ns 1.5 10.0 1.5 6.2 1.5 6.5 ns 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns AD VA NC E Symbol FCT166245AT IN FO RM AT IO N FCT166245T Max. Min.(2) Max. Unit 1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 ns 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns 1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns — 0.5 — 0.5 — 0.5 — 0.5 ns NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design. 4. This parameter is guaranteed but not tested. 5.3 2545 tbl 13 8 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES TEST CIRCUITS AND WAVEFORMS SWITCH POSITION TEST CIRCUITS FOR ALL OUTPUTS V CC 500Ω Pulse Generator Switch Open Drain Disable Low Closed Enable Low V OUT VIN Test 7.0V Open All Other Tests D.U.T. 50pF RT 2545 lnk 14 DEFINITIONS: CL= Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. 500Ω CL 2545 drw 05 SET-UP, HOLD AND RELEASE TIMES DATA INPUT tH tSU TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. tREM tSU PULSE WIDTH 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V LOW-HIGH-LOW PULSE 1.5V tW HIGH-LOW-HIGH PULSE 1.5V 3V 1.5V 0V tH 2545 drw 07 2545 drw 06 PROPAGATION DELAY ENABLE AND DISABLE TIMES ENABLE SAME PHASE INPUT TRANSITION tPLH tPHL OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL 3V 1.5V 0V DISABLE 3V 1.5V CONTROL INPUT tPZL VOH 1.5V VOL OUTPUT NORMALLY LOW 3V 1.5V 0V SWITCH CLOSED 2545 drw 08 SWITCH OPEN 3.5V 3.5V 1.5V tPZH OUTPUT NORMALLY HIGH 0V tPLZ 0.3V VOL tPHZ 0.3V VOH 1.5V 0V 0V 2545 drw 09 NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns 5.3 9 IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES ORDERING INFORMATION IDT XX Temp. Range FCT X X XXXX X X Drive Bus Hold Device Type Package Process Blank B Commercial MIL-STD-883, Class B PV PA PF E Shrink Small Outline Package (SO48-1) Thin Shrink Small Outline Package (SO48-2) Thin Very Small Outline Package (SO48-3) CERPACK (E48-1) 245T 245AT 245CT 245ET Non-Inverting 16-Bit Bidirectional Transceiver Blank H Standard Bus Hold 16 162 166 16-Bit High Drive 16-Bit Balanced Drive 16-Bit Light Drive 54 74 –55°C to +125°C –40°C to +85°C 2545 drw 10 5.3 10