CY74FCT2244T 8-BIT BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS SCCS074 – OCTOBER 2001 D D D D D D D D D Function and Pinout Compatible With FCT and F Logic 25-Ω Output Series Resistors Reduce Transmission-Line Reflection Noise TTL-Output-Level Version of Equivalent FCT Functions Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics Ioff Supports Partial-Power-Down Mode Operation ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) Fully Compatible With TTL Input and Output Logic Levels 12-mA Output Sink Current 15-mA Output Source Current 3-State Outputs Q OR SO PACKAGE (TOP VIEW) OEA DA0 OB0 DA1 OB1 DA2 OB2 DA3 OB3 GND 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC OEB OA0 DB0 OA1 DB1 OA2 DB2 OA3 DB3 description The CY74FCT2244T is an octal buffer and line driver that includes on-chip 25-Ω 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 a memory address driver, clock driver, and bus-oriented transmitter/receiver, this device provides speed and drive capabilities commensurate with its 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. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. ORDERING INFORMATION TA PACKAGE† QSOP – Q SOIC – SO QSOP – Q –40°C to 85°C SOIC – SO QSOP – Q SOIC – SO SPEED (ns) ORDERABLE PART NUMBER Tape and reel 4.3 CY74FCT2244CTQCT Tube 4.3 CY74FCT2244CTSOC Tape and reel 4.3 CY74FCT2244CTSOCT Tape and reel 4.6 CY74FCT2244ATQCT Tube 4.6 CY74FCT2244ATSOC Tape and reel 4.6 CY74FCT2244ATSOCT Tape and reel 6.5 CY74FCT2244TQCT Tube 6.5 CY74FCT2244TSOC Tape and reel 6.5 CY74FCT2244TSOCT TOP-SIDE MARKING FCT2244C FCT2244C FCT2244A FCT2244A FCT2244 FCT2244 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 2001, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 CY74FCT2244T 8-BIT BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS SCCS074 – OCTOBER 2001 FUNCTION TABLE INPUTS D OUTPUT O OEA OEB L L L L L L H H H H X Z H = High logic level, L = Low logic level, X = Don’t care, Z = High-impedance (off) state logic diagram OEA 1 19 DA0 OB0 DA1 OB1 DA2 OB2 DA3 OB3 2 2 18 3 17 4 16 5 15 6 14 7 13 8 12 9 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 OEB OA0 DB0 OA1 DB1 OA2 DB2 OA3 DB3 CY74FCT2244T 8-BIT BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS SCCS074 – OCTOBER 2001 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range to ground potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V DC input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V DC output voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V DC output current (maximum sink current/pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 mA Package thermal impedance, θJA (see Note 1): Q package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68°C/W SO package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W Ambient temperature range with power applied, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +135°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions (see Note 2) MIN NOM MAX UNIT 4.75 5 5.25 V VCC VIH Supply voltage VIL IOH Low-level input voltage 0.8 V High-level output current –15 mA IOL TA Low-level output current 12 mA 85 °C High-level input voltage 2 Operating free-air temperature –40 V NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 CY74FCT2244T 8-BIT BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS SCCS074 – OCTOBER 2001 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIK VOH VCC = 4.75 V, VCC = 4.75 V, IIN = –18 mA IOH = –15 mA VOL ROUT VCC = 4.75 V, VCC = 4.75 V, IOL = 12 mA IOL = 12 mA Vhys II All inputs IIH IIL IOZH IOZL IOS‡ Ioff ICC ∆ICC ICCD¶ IC# MIN 2.4 20 TYP† MAX UNIT –0.7 –1.2 V 3.3 V 0.3 0.55 V 25 40 Ω 5 µA ±1 µA ±1 µA 10 µA 0.2 VCC = 5.25 V, VCC = 5.25 V, VIN = VCC VIN = 2.7 V VCC = 5.25 V, VCC = 5.25 V, VIN = 0.5 V VOUT = 2.7 V VCC = 5.25 V, VCC = 5.25 V, VOUT = 0.5 V VOUT = 0 V –60 VCC = 0 V, VCC = 5.25 V, –120 V –10 µA –225 mA ±1 µA VOUT = 4.5 V VIN ≤ 0.2 V, VIN ≥ VCC – 0.2 V VCC = 5.25 V, VIN = 3.4 V§, f1 = 0, Outputs open 0.1 0.2 mA 0.5 2 mA VCC = 5.25 V, One input switching at 50% duty cycle, Outputs open, OEA = OEB = GND, VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V 0.06 0.12 mA/ MHz 0.7 1.4 1 2.4 1.3 2.6|| 3.3 10.6|| 5 10 VCC = 5.25 V, Outputs open, open OEA = OEB = GND One bit switching at f1 = 10 MHz at 50% duty cycle Eight bits switching at f1 = 2.5 MHz at 50% duty cycle VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V VIN = 3.4 V or GND VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V VIN = 3.4 V or GND Ci mA pF Co 9 12 pF † Typical values are at VCC = 5 V, TA = 25°C. ‡ 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 to minimize internal chip heating and more accurately reflect operational values. Otherwise, prolonged shorting of a high output can raise the chip temperature well above normal and cause invalid readings in other parametric tests. In any sequence of parameter tests, IOS tests should be performed last. § Per TTL-driven input (VIN = 3.4 V); all other inputs at VCC or GND ¶ This parameter is derived for use in total power-supply calculations. # IC = ICC + ∆ICC × DH × NT + ICCD (f0/2 + f1 × N1) Where: IC = Total supply current ICC = Power-supply current with CMOS input levels ∆ICC = Power-supply current for a TTL high input (VIN = 3.4 V) 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) f0 = Clock frequency for registered devices, otherwise zero f1 = Input signal frequency N1 = Number of inputs changing at f1 All currents are in milliamperes and all frequencies are in megahertz. || Values for these conditions are examples of the ICC formula. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 CY74FCT2244T 8-BIT BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS SCCS074 – OCTOBER 2001 switching characteristics over operating free-air temperature range (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL D O tPZH tPZL OE O tPHZ tPLZ OE O POST OFFICE BOX 655303 CY74FCT2244T CY74FCT2244AT CY74FCT2244CT MIN MAX MIN MAX MIN MAX 1.5 6.5 1.5 4.6 1.5 4.1 1.5 6.5 1.5 4.6 1.5 4.1 1.5 8 1.5 6.2 1.5 5.8 1.5 8 1.5 6.2 1.5 5.8 1.5 7 1.5 5.6 1.5 5.2 1.5 7 1.5 5.6 1.5 5.2 • DALLAS, TEXAS 75265 UNIT ns ns ns 5 CY74FCT2244T 8-BIT BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS SCCS074 – OCTOBER 2001 PARAMETER MEASUREMENT INFORMATION 7V From Output Under Test From Output Under Test Test Point CL = 50 pF (see Note A) Open TEST GND CL = 50 pF (see Note A) 500 Ω S1 500 Ω S1 Open 7V Open tPLH/tPHL tPLZ/tPZL tPHZ/tPZH 500 Ω LOAD CIRCUIT FOR 3-STATE OUTPUTS LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS 3V 1.5 V Timing Input 0V tw tsu 3V 1.5 V Input 1.5 V th 3V 1.5 V Data Input 1.5 V 0V 0V VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS SETUP AND HOLD TIMES 3V 1.5 V Input 1.5 V 0V tPLH tPHL 1.5 V 1.5 V VOL tPHL Out-of-Phase Output tPLZ ≈3.5 V 1.5 V tPZH VOH 1.5 V VOL 1.5 V 0V Output Waveform 1 (see Note B) tPLH 1.5 V 1.5 V tPZL VOH In-Phase Output 3V Output Control Output Waveform 2 (see Note B) VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS VOL + 0.3 V VOL tPHZ 1.5 V VOH – 0.3 V VOH ≈0 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. The outputs are measured one at a time with one input transition per measurement. Figure 1. Load Circuit and Voltage Waveforms 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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