SN54AHC257, SN74AHC257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SCLS349C – MAY 1996 – REVISED JULY 1998 D SN54AHC257 . . . J OR W PACKAGE SN74AHC257 . . . D, DB, DGV, N, OR PW PACKAGE (TOP VIEW) Operating Range 2-V to 5.5-V VCC EPIC (Enhanced-Performance Implanted CMOS) Process Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB), Thin Very Small-Outline (DGV), Thin Shrink Small-Outline (PW), and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs A/B 1A 1B 1Y 2A 2B 2Y GND description These quadruple 2-line to 1-line data selectors/multiplexers are designed for 2-V to 5.5-V VCC operation. 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC OE 4A 4B 4Y 3A 3B 3Y 1A A/B NC VCC OE SN54AHC257 . . . FK PACKAGE (TOP VIEW) The ’AHC257 devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level. 1B 1Y NC 2A 2B 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 4A 4B NC 4Y 3A 2Y GND NC 3Y 3B 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. 4 PRODUCT PREVIEW D D NC – No internal connection The SN54AHC257 is characterized for operation over the full military temperature range of –55°C to 125°C. The SN74AHC257 is characterized for operation from –40°C to 85°C. FUNCTION TABLE INPUTS OE A/B A B OUTPUT Y H X X X Z L L L X L L L H X H L H X L L L H X H H 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 Incorporated. Copyright 1998, Texas Instruments Incorporated PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 SN54AHC257, SN74AHC257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SCLS349C – MAY 1996 – REVISED JULY 1998 logic symbol† OE A/B 1A 1B 2A 2B 3A 3B 4A 4B 15 1 EN G1 2 1 3 MUX 4 1Y 1 5 7 6 11 9 10 14 12 13 2Y 3Y 4Y PRODUCT PREVIEW † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, DB, DGV, J, N, PW, and W packages. logic diagram (positive logic) OE A/B 1A 1B 2A 2B 3A 3B 4A 4B 15 1 2 4 5 7 2Y 6 11 9 3Y 10 14 12 13 Pin numbers shown are for the D, DB, DGV, J, N, PW, and W packages. 2 1Y 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 4Y SN54AHC257, SN74AHC257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SCLS349C – MAY 1996 – REVISED JULY 1998 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† † 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, except for through-hole packages, which use a trace length of zero. recommended operating conditions (see Note 3) SN54AHC257 VCC Supply voltage VIH High-level input voltage VCC = 2 V VCC = 3 V VCC = 5.5 V VCC = 2 V VIL Low-level input voltage SN74AHC257 MIN MAX MIN MAX 2 5.5 2 5.5 1.5 V 1.5 2.1 2.1 3.85 3.85 0.5 VCC = 3 V VCC = 5.5 V UNIT V 0.5 0.9 0.9 1.65 1.65 V VI VO Input voltage 0 5.5 0 5.5 V Output voltage 0 VCC –50 0 VCC –50 V IOH High-level output current VCC = 2 V VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 2 V IOL ∆t/∆v Low-level output current Input transition rise or fall rate –4 –4 –8 –8 50 50 VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V 4 4 8 8 VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V 100 100 20 20 mA mA mA mA ns/V TA Operating free-air temperature –55 125 –40 85 °C 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 PRODUCT PREVIEW 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113°C/W DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131°C/W DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C SN54AHC257, SN74AHC257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SCLS349C – MAY 1996 – REVISED JULY 1998 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = –50 mA 1.9 2 1.9 1.9 MAX SN74AHC257 MIN 3 2.9 2.9 4.4 4.5 4.4 4.4 IOH = –4 mA 3V 2.58 2.48 2.48 IOH = –8 mA 4.5 V 3.94 3.8 3.8 IOL = 4 mA PRODUCT PREVIEW 2V MIN 2.9 VOL 4 SN54AHC257 3V IOL = 50 mA IOZ Ci TA = 25°C TYP MAX 4.5 V VOH II ICC MIN VCC IOL = 8 mA VI = VCC or GND VI = VCC or GND, VO = VCC or GND VI = VCC or GND IO = 0 MAX UNIT V 2V 0.1 0.1 0.1 3V 0.1 0.1 0.1 4.5 V 0.1 0.1 0.1 3V 0.36 0.5 0.44 4.5 V 0.36 0.5 0.44 5.5 V ±0.1 ±1 ±1 mA 5.5 V 4 40 40 mA 5.5 V ±0.25 ±2.5 ±2.5 mA 5V POST OFFICE BOX 655303 V pF • DALLAS, TEXAS 75265 SN54AHC257, SN74AHC257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SCLS349C – MAY 1996 – REVISED JULY 1998 switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1) SN54AHC257 FROM (INPUT) TO (OUTPUT) LOAD CAPACITANCE tPLH* tPHL* A or B Y CL = 15 pF ns tPLH* tPHL* A/B Y CL = 15 pF ns tPZH* tPZL* OE Y CL = 15 pF ns tPHZ* tPLZ* OE Y CL = 15 pF ns tPLH tPHL A or B Y CL = 50 pF ns tPLH tPHL A/B Y CL = 50 pF ns tPZH tPZL OE Y CL = 50 pF ns tPHZ tPLZ OE Y CL = 50 pF ns TA = 25°C MIN TYP MAX MIN MAX UNIT PRODUCT PREVIEW PARAMETER * On products compliant to MIL-PRF-38535, this parameter is not production tested. switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1) SN74AHC257 PARAMETER FROM (INPUT) TO (OUTPUT) LOAD CAPACITANCE MIN TA = 25°C TYP MAX MIN MAX UNIT tPLH tPHL A or B Y CL = 15 pF ns tPLH tPHL A/B Y CL = 15 pF ns tPZH tPZL OE Y CL = 15 pF ns tPHZ tPLZ OE Y CL = 15 pF ns tPLH tPHL A or B Y CL = 50 pF ns tPLH tPHL A/B Y CL = 50 pF ns tPZH tPZL OE Y CL = 50 pF ns tPHZ tPLZ OE Y CL = 50 pF ns POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN54AHC257, SN74AHC257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SCLS349C – MAY 1996 – REVISED JULY 1998 switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) SN54AHC257 FROM (INPUT) TO (OUTPUT) LOAD CAPACITANCE tPLH* tPHL* A or B Y CL = 15 pF ns tPLH* tPHL* A/B Y CL = 15 pF ns tPZH* tPZL* OE Y CL = 15 pF ns tPHZ* tPLZ* OE Y CL = 15 pF ns tPLH tPHL A or B Y CL = 50 pF ns tPLH tPHL A/B Y CL = 50 pF ns tPZH tPZL OE Y CL = 50 pF ns tPHZ tPLZ OE Y CL = 50 pF ns PRODUCT PREVIEW PARAMETER TA = 25°C MIN TYP MAX MIN MAX UNIT * On products compliant to MIL-PRF-38535, this parameter is not production tested. switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) SN74AHC257 PARAMETER FROM (INPUT) TO (OUTPUT) LOAD CAPACITANCE MIN 6 TA = 25°C TYP MAX MIN MAX UNIT tPLH tPHL A or B Y CL = 15 pF ns tPLH tPHL A/B Y CL = 15 pF ns tPZH tPZL OE Y CL = 15 pF ns tPHZ tPLZ OE Y CL = 15 pF ns tPLH tPHL A or B Y CL = 50 pF ns tPLH tPHL A/B Y CL = 50 pF ns tPZH tPZL OE Y CL = 50 pF ns tPHZ tPLZ OE Y CL = 50 pF ns POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54AHC257, SN74AHC257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SCLS349C – MAY 1996 – REVISED JULY 1998 noise characteristics VCC = 5 V, CL = 50 pF, TA = 25°C (see Note 4) SN74AHC257 PARAMETER MIN TYP MAX UNIT VOL(P) Quiet output, maximum dynamic VOL V VOL(V) Quiet output, minimum dynamic VOL V VOH(V) Quiet output, minimum dynamic VOH V VIH(D) High-level dynamic input voltage V VIL(D) Low-level dynamic input voltage NOTE 4: Characteristics are for surface-mount packages only. V operating characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS Power dissipation capacitance No load, f = 1 MHz TYP UNIT pF PRODUCT PREVIEW Cpd POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 SN54AHC257, SN74AHC257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SCLS349C – MAY 1996 – REVISED JULY 1998 PARAMETER MEASUREMENT INFORMATION RL = 1 kΩ From Output Under Test Test Point From Output Under Test VCC Open S1 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 VCC 50% VCC Timing Input 0V tw tsu VCC 50% VCC 50% VCC Input th VCC 50% VCC Data Input 50% VCC PRODUCT PREVIEW 0V 0V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PULSE DURATION VCC 50% VCC Input 50% VCC tPLH In-Phase Output tPHL 50% VCC tPHL Out-of-Phase Output 0V VOH 50% VCC VOL VCC Output Control 50% VCC 0V tPZL Output Waveform 1 S1 at VCC (see Note B) tPLH 50% VCC VOH 50% VCC VOL 50% VCC Output Waveform 2 S1 at GND (see Note B) VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS tPLZ 50% VCC tPZH ≈ VCC VOL + 0.3 V VOL tPHZ 50% VCC VOH – 0.3 V VOH ≈0V 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 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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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