Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered. CY74FCT2240T CY74FCT2244T 8-Bit Buffers/Line Drivers SCCS036 - September 1994 - Revised March 2000 Features Functional Description • Function and pinout compatible with FCT and F logic • 25Ω output series resistors to reduce transmission line reflection noise • FCT-C speed at 4.1 ns max. (Com’l) FCT-A speed at 4.8 ns max. (Com’l) • TTL output level versions of equivalent FCT functions • Edge-rate control circuitry for significantly improved noise characteristics • Power-off disable feature permits live insertion • ESD > 2000V • Fully compatible with TTL input and output logic levels • Sink current 12 mA Source current15 mA • Extended commercial temp. range of –40˚C to +85˚C • Three-state outputs Logic Block Diagram FCT2240T The FCT2240T and FCT2244T are octal buffers and line drivers that include on-chip 25Ω terminating resistors at each of the outputs, to minimize noise resulting from reflections or standing waves in high-performance applications. The on-chip resistors reduce overall board space and component count. Designed to be employed as memory address drivers, clock drivers, and bus-oriented transmitters/receivers, these devices provide speed and drive capabilities commensurate with their fastest bipolar logic counterparts while reducing power dissipation. The input and output voltage levels allow direct interface with TTL, NMOS, and CMOS devices without the need for external components. The outputs are designed with a power-off disable feature to allow for live insertion of boards. Pin Configurations OEA SOIC/QSOP Top View OEB DA0 OA0 OB0 DB0 DA1 OA1 OB1 DB1 DA2 OA2 OB2 DB2 DA3 OA3 OB3 DB3 OEA 1 20 VCC DA0 2 19 OEB OB0 3 18 OA0 DA1 4 17 DB0 OB1 5 FCT2240T 16 OA1 DA2 6 15 DB1 OB2 7 14 OA2 DA3 8 13 DB2 OB3 9 12 OA3 GND 10 11 DB3 FCT2240T–3 FCT2240T–2 Logic Block Diagram FCT2244T DIP/SOIC/QSOP Top View OEA OE B DA0 OB0 DA1 OB1 OA0 DB0 OA1 DB1 DA2 OA2 OB2 DB2 DA3 OA3 OB3 OEA 1 20 VCC DA0 2 19 OE B OB0 3 18 OA0 DA1 4 17 DB0 OB1 5 FCT2244T 16 OA1 DA2 6 15 DB1 OB2 7 14 OA2 DA3 8 13 DB2 OB3 9 12 OA3 GND 10 11 DB3 FCT2240T–6 DB3 FCT2240T–4 Copyright © 2000, Texas Instruments Incorporated CY74FCT2240T CY74FCT2244T ] Function Table FCT2240T[1] Function Table FCT2244T[1] Inputs Inputs OEA OEB D Output OEA OEB D Output L L H L L H L H X H L Z L L H L L H L H X L H Z Maximum Ratings[2, 3] DC Output Current (Maximum Sink Current/Pin) ...... 120 mA Power Dissipation .......................................................... 0.5W (Above which the useful life may be impaired. For user guidelines, not tested.) Static Discharge Voltage............................................>2001V (per MIL-STD-883, Method 3015) Storage Temperature .................................–65°C to +150°C Operating Range Ambient Temperature with Power Applied .............................................–65°C to +135°C Range Range Ambient Temperature VCC Commercial T, AT, CT –40°C to +85°C 5V ± 5% Supply Voltage to Ground Potential ............... –0.5V to +7.0V DC Input Voltage............................................ –0.5V to +7.0V DC Output Voltage ......................................... –0.5V to +7.0V Electrical Characteristics Over the Operating Range Parameter Description Test Conditions Min. Typ.[5] 2.4 3.3 VOH Output HIGH Voltage VCC=Min., IOH=–15 mA Com’l VOL Output LOW Voltage VCC=Min., IOL=12 mA Com’l ROUT Output Resistance VCC=Min., IOL=12 mA Com’l VIH Input HIGH Voltage VIL Input LOW Voltage VH Hysteresis[6] All inputs 0.2 VIK Input Clamp Diode Voltage VCC=Min., IIN=–18 mA –0.7 II Input HIGH Current IIH IIL 20 Max. Unit V 0.3 0.55 V 25 40 Ω 2.0 V 0.8 V V –1.2 V VCC=Max., VIN=VCC 5 µA Input HIGH Current VCC=Max., VIN=2.7V ±1 µA Input LOW Current VCC=Max., VIN=0.5V ±1 µA IOZH Off State HIGH-Level Output Current VCC=Max., VOUT=2.7V 10 µA IOZL Off State LOW-Level Output Current VCC=Max., VOUT=0.5V –10 µA IOS Output Short Circuit Current[7] VCC=Max., VOUT=0.0V –225 mA IOFF Power-Off Disable VCC=0V, VOUT=4.5V ±1 µA –60 –120 Notes: 1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. 2. Unless otherwise noted, these limits are over the operating free-air temperature range. 3. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground. 4. TA is the “instant on” case temperature. 5. Typical values are at VCC=5.0V, TA=+25˚C ambient. 6. This parameter is specified but not tested. 7. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter tests, IOS tests should be performed last. 2 CY74FCT2240T CY74FCT2244T Capacitance[6] Parameter Description Typ. [5] Max. Unit CIN Input Capacitance 5 10 pF COUT Output Capacitance 9 12 pF Power Supply Characteristics Parameter Description Test Conditions Typ.[5] Max. Unit ICC Quiescent Power Supply Current VCC=Max., VIN < 0.2V, VIN > VCC–0.2V 0.1 0.2 mA ∆ICC Quiescent Power Supply Current (TTL inputs) VCC=Max., VIN=3.4V,[8] f1=0, Outputs Open 0.5 2.0 mA ICCD Dynamic Power Supply Current[9] VCC=Max., One Input Toggling, 50% Duty Cycle, Outputs Open, OE1=OE2=GND, VIN < 0.2V or VIN > VCC–0.2V 0.06 0.12 mA/ MHz IC Total Power Supply Current[10] VCC=Max., 50% Duty Cycle, Outputs Open, One Bit Toggling at f1=10 MHz, OE1=OE2=GND, VIN < 0.2V or VIN > VCC–0.2V 0.7 1.4 mA VCC=Max., 50% Duty Cycle, Outputs Open, One Bit Toggling at f1=10 MHz, OE1=OE2=GND, VIN=3.4V or VIN=GND 1.0 2.4 mA VCC=Max., 50% Duty Cycle, Outputs Open, Eight Bits Toggling at f1=2.5 MHz, OE1=OE2=GND, VIN < 0.2V or VIN > VCC–0.2V 1.3 2.6[11] mA VCC=Max., 50% Duty Cycle, Outputs Open, Eight Bits Toggling at f1=2.5 MHz, OE1=OE2=GND, VIN=3.4V or VIN=GND 3.3 10.6[11] mA Notes: 8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND. 9. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. = IQUIESCENT + IINPUTS + IDYNAMIC 10. IC IC = ICC+∆ICCDHNT+ICCD(f0/2 + f1N1) ICC = Quiescent Current with CMOS input levels ∆ICC = Power Supply Current for a TTL HIGH input (VIN=3.4V) = Duty Cycle for TTL inputs HIGH DH = Number of TTL inputs at DH NT ICCD = Dynamic Current caused by an input transition pair (HLH or LHL) = Clock frequency for registered devices, otherwise zero f0 = Input signal frequency f1 = Number of inputs changing at f1 N1 All currents are in milliamps and all frequencies are in megahertz. 11. Values for these conditions are examples of the ICC formula. These limits are specified but not tested. 3 CY74FCT2240T CY74FCT2244T Switching Characteristics FCT2240T Over the Operating Range[12] FCT2240T Parameter Description FCT2240AT FCT2240CT Commercial Commercial Commercial Min. Max. Min. Max. Min. Max. Unit Fig. No.[13] tPLH tPHL Propagation Delay Data to Input 1.5 8.0 1.5 8.0 1.5 4.1 ns 1, 2 tPZH tPZL Output Enable Time 1.5 10.0 1.5 10.0 1.5 5.8 ns 1, 7, 8 tPHZ tPLZ Output Disable Time 1.5 9.5 1.5 9.5 1.5 5.2 ns 1, 7, 8 Switching Characteristics FCT2244T Over the Operating Range[12] Parameter Description FCT2244T FCT2244AT FCT2244CT Commercial Commercial Commercial Min. Max. Min. Max. Min. Max. Unit Fig. No.[13] tPLH tPHL Propagation Delay Data to Input 1.5 6.5 1.5 4.6 1.5 4.1 ns 1, 3 tPZH tPZL Output Enable Time 1.5 8.0 1.5 6.2 1.5 5.8 ns 1, 7, 8 tPHZ tPLZ Output Disable Time 1.5 7.0 1.5 5.6 1.5 5.2 ns 1, 7, 8 Notes: 12. Minimum limits are specified but not tested on Propagation Delays. 13. See “Parameter Measurement Information” in the General Information section. Ordering Information Speed (ns) 4.1 Ordering Code CY74FCT2240CTQCT Package Name Package Type Q5 20-Lead (150-Mil) QSOP Operating Range Commercial CY74FCT2240CTSOC/SOCT S5 20-Lead (300-Mil) Molded SOIC 4.8 CY74FCT2240ATQCT Q5 20-Lead (150-Mil) QSOP Commercial 8.0 CY74FCT2240TSOC/SOCT S5 20-Lead (300-Mil) Molded SOIC Commercial Speed (ns) 4.3 4.6 6.5 Ordering Code CY74FCT2244CTQCT Package Name Package Type Q5 20-Lead (150-Mil) QSOP CY74FCT2244CTSOC/SOCT S5 20-Lead (300-Mil) Molded SOIC CY74FCT2244ATQCT Q5 20-Lead (150-Mil) QSOP CY74FCT2244ATSOC/SOCT S5 20-Lead (300-Mil) Molded SOIC CY74FCT2244TQCT Q5 20-Lead (150-Mil) QSOP CY74FCT2244TSOC/SOCT S5 20-Lead (300-Mil) Molded SOIC Document #: 38-00341-B 4 Operating Range Commercial Commercial Commercial CY74FCT2240T CY74FCT2244T Package Diagrams 20-Lead Quarter Size Outline Q5 20-Lead (300-Mil) Molded SOIC S5 5 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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