SN74AHCT244QDWRG4

SN74AHCT244Q OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SGDS024 – FEBRUARY 2002 D D D D D DW OR PW PACKAGE (TOP VIEW) Q Devices Meet Automotive Performance Requirements Customer-Specific Configuration Control Can Be Supported Along with Major-Change Approval EPIC (Enhanced-Performance Implanted CMOS) Process Inputs Are TTL-Voltage Compatible Latch-Up Performance Exceeds 250 mA Per JESD 17 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND description 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 This octal buffer/driver is designed specifically to improve both the performance and density of 3-state memory-address drivers, clock drivers, and bus-oriented receivers and transmitters. The SN74AHCT244Q is organized as two 4-bit buffers/line drivers with separate output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. ORDERING INFORMATION –40°C 40°C to 125°C ORDERABLE PART NUMBER PACKAGE† TA TOP-SIDE MARKING SOIC – D Tape and reel SN74AHCT244QDWR TSSOP – PW Tape and reel SN74AHCT244QPWR AHCT244Q HB244Q † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION TABLE (each 4-bit buffer/driver) INPUTS OE A OUTPUT Y L H H L L L H X Z 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. EPIC is a trademark of Texas Instruments. Copyright  2002, 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 SN74AHCT244Q OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SGDS024 – FEBRUARY 2002 logic symbol† 1OE 1A1 1A2 1A3 1A4 1 EN 2OE 18 2 4 16 6 14 12 8 1Y1 2A1 1Y2 2A2 1Y3 2A3 1Y4 2A4 19 EN 11 9 13 7 15 5 17 3 2Y1 2Y2 2Y3 2Y4 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram (positive logic) 1OE 1A1 1A2 1A3 1A4 1 2OE 2 18 4 16 6 14 8 12 1Y1 2A1 1Y2 2A2 1Y3 2A3 1Y4 2A4 19 11 9 13 7 15 5 17 3 2Y1 2Y2 2Y3 2Y4 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20 mA Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±75 mA Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W 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. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51-7 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN74AHCT244Q OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SGDS024 – FEBRUARY 2002 recommended operating conditions (see Note 3) VCC VIH Supply voltage VIL VI Low-level input voltage Input voltage VO IOH Output voltage IOL TA Low-level output current MIN MAX 4.5 5.5 High-level input voltage 2 V V 0.8 V 0 5.5 V 0 VCC –8 mA 8 mA 125 °C High-level output current Operating free-air temperature UNIT –40 V NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC VOH IOH = –50 mA IOH = –8 mA 45V 4.5 VOL IOL = 50 mA IOL = 8 mA 45V 4.5 IOZ II VO = VCC or GND VI = 5.5 V or GND ICC VI = VCC or GND, One input at 3.4 V, Other inputs at VCC or GND ∆ICC† Ci IO = 0 VI = VCC or GND VO = VCC or GND MIN 4.4 TA = 25°C TYP MAX 4.5 MIN MAX 4.4 3.94 UNIT V 3.8 0.1 0.1 0.36 0.44 5.5 V ±0.25 ±2.5 mA 0 V to 5.5 V V ±0.1 ±1 mA 5.5 V 4 40 mA 5.5 V 1.35 1.5 mA 5V 2.5 10 pF Co 5V 3 † This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC. pF switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) LOAD CAPACITANCE tPLH tPHL A Y CL = 15 pF tPZH tPZL OE Y CL = 15 pF tPHZ tPLZ OE Y CL = 15 pF tPLH tPHL A Y CL = 50 pF tPZH tPZL OE Y CL = 50 pF tPHZ tPLZ OE Y CL = 50 pF tsk(o) TA = 25°C MIN TYP MAX CL = 50 pF POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MIN MAX 5.4 7.4 1 8.5 5.4 7.4 1 8.5 7.7 10.4 1 12 7.7 10.4 1 12 5 9.4 1 10 5 9.4 1 10 5.9 8.4 1 9.5 5.9 8.4 1 9.5 8.2 11.4 1 13 8.2 11.4 1 13 8.8 11.4 1 13 8.8 11.4 1 13 1 UNIT ns ns ns ns ns ns ns 3 SN74AHCT244Q OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SGDS024 – FEBRUARY 2002 noise characteristics, VCC = 5 V, CL = 50 pF, TA = 25°C (see Note 4) PARAMETER VOH(V) VIH(D) MIN Quiet output, minimum dynamic VOH TYP MAX 4.1 High-level dynamic input voltage V 2 VIL(D) Low-level dynamic input voltage NOTE 4: Characteristics are for surface-mount packages only. UNIT V 0.8 V TYP UNIT 8.2 pF operating characteristics, VCC = 5 V, TA = 25°C PARAMETER Cpd 4 TEST CONDITIONS Power dissipation capacitance No load, POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 f = 1 MHz SN74AHCT244Q OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SGDS024 – FEBRUARY 2002 PARAMETER MEASUREMENT INFORMATION From Output Under Test RL = 1 kΩ From Output Under Test Test Point S1 VCC Open TEST GND CL (see Note A) CL (see Note A) S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Drain Open VCC GND VCC LOAD CIRCUIT FOR 3-STATE AND OPEN-DRAIN OUTPUTS LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS 3V 1.5 V Timing Input 0V tw 3V 1.5 V Input 1.5 V th tsu 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 In-Phase Output tPHL 50% VCC tPHL Out-of-Phase Output VOH 50% VCC VOL Output Waveform 1 S1 at VCC (see Note B) VOH 50% VCC VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS 1.5 V 1.5 V 0V tPZL tPLZ ≈VCC 50% VCC tPZH tPLH 50% VCC 3V Output Control Output Waveform 2 S1 at GND (see Note B) VOL + 0.3 V VOL tPHZ 50% VCC 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. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr ≤ 3 ns, tf ≤ 3 ns. D. The outputs are measured one at a time with one input transition per measurement. Figure 1. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 PACKAGE OPTION ADDENDUM www.ti.com 6-Aug-2021 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) SN74AHCT244QDWR ACTIVE SOIC DW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 AHCT244Q SN74AHCT244QPWR ACTIVE TSSOP PW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 HB244Q SN74AHCT244QPWRG4 ACTIVE TSSOP PW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM HB244Q (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of