SDFS065A - D2932, MARCH 1987 - REVISED OCTOBER 1993 * * * SN54F257 . . . J PACKAGE SN74F257 . . . D OR N PACKAGE (TOP VIEW) 3-State Outputs Interface Directly With System Bus Provides Bus Interface From Multiple Sources in High-Performance Systems Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs A /B 1A 1B 1Y 2A 2B 2Y GND description The F257 is designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs will not load the data lines when the output enable (OE) input is at a high logic level. X X Z L X L L H X H L H X L L L H X H H A /B A H X L L L 3 14 4 13 5 12 6 11 7 10 8 9 VCC OE 4A 4B 4Y 3A 3B 3Y 4 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 B OE 15 1A A/B NC VCC OE 1B 1Y NC 2A 2B FUNCTION TABLE OUTPUT Y 16 2 SN54F257 . . . FK PACKAGE (TOP VIEW) The SN54F257 is characterized for operation over the full military temperature range of - 55C to 125C. The SN74F257 is characterized for operation from 0C to 70C. INPUTS 1 NC - No internal connection logic symbol 15 OE 1 A /B 1A 1B 2A 2B 3A 3B 4A 4B EN G1 2 3 1 MUX 4 1 1Y 5 7 6 2Y 11 9 10 3Y 14 12 13 4Y This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. Copyright 1993, Texas Instruments Incorporated !"#$%&" ' ()##*& %' "! +),-(%&" .%&*/ #".)(&' ("!"#$ &" '+*(!(%&"' +*# &0* &*#$' "! *1%' '&#)$*&' '&%.%#. 2%##%&3/ #".)(&" +#"(*''4 ."*' "& *(*''%#-3 (-).* &*'&4 "! %-- +%#%$*&*#'/ * DALLAS, TEXAS 75265 * HOUSTON, TEXAS 77251-1443 POST OFFICE BOX 655303 POST OFFICE BOX 1443 2-1 SDFS065A - D2932, MARCH 1987 - REVISED OCTOBER 1993 logic diagram (positive logic) OE A/B 1A 1B 2A 15 1 2 4 3 5 7 2B 3A 3B 4A 4B 1Y 2Y 6 11 9 3Y 10 14 12 4Y 13 Pin numbers shown are for the D, J, and N packages. 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 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.2 V to 7 V Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 mA to 5 mA Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . -0.5 V to 5.5 V Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to VCC Current into any output in the low state: SN54F257 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA SN74F257 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA Operating free-air temperature range: SN54F257 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55C to 125C SN74F257 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to 150C 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 input voltage ratings may be exceeded provided the input current ratings are observed. 2-2 * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * SDFS065A - D2932, MARCH 1987 - REVISED OCTOBER 1993 recommended operating conditions SN54F257 SN74F257 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IIK Low-level input voltage 0.8 0.8 V Input clamp current -18 -18 mA IOH IOL High-level output current -3 -3 mA 24 mA TA Operating free-air temperature 70 C High-level input voltage 2 2 Low-level output current V 20 -55 125 V 0 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VCC = 4.5 V, VCC = 4.5 V VCC = 4.75 V, MIN II = - 18 mA IOH = - 1 mA VCC = 4.5 V IOL = 20 mA IOL = 24 mA IOZH IOZL VCC = 5.5 V, VCC = 5.5 V, VO = 2.7 V VO = 0.5 V II IIH VCC = 5.5 V, VCC = 5.5 V, VI = 7 V VI = 2.7 V IIL IOS VCC = 5.5 V, VCC = 5.5 V, VI = 0.5 V VO = 0 SN74F257 TYP MAX MIN -1.2 IOH = - 3 mA IOH = - 1 mA to - 3 mA VOL ICCH ICCL SN54F257 TYP MAX TEST CONDITIONS -1.2 2.5 3.4 2.5 3.4 2.4 3.3 2.4 3.3 0.3 V 0.5 0.35 0.5 50 50 A -50 A 0.1 0.1 mA 20 20 A - 0.6 mA -150 mA -150 -60 9 15 9 15 Condition B 14.5 22 14.5 22 ICCZ Condition C 15 23 15 All typical values are at VCC = 5 V, TA = 25C. Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second. NOTE 2: ICC is measured with the outputs open under the following conditions: A. A/B and all B inputs at 4.5 V, other inputs grounded B. All B inputs at 4.5 V, other inputs grounded C. OE and all B data inputs at 4.5 V, other inputs grounded 23 * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 V -50 - 0.6 -60 * V 2.7 Condition A VCC = 5.5 V, See Note 2 UNIT mA 2-3 SDFS065A - D2932, MARCH 1987 - REVISED OCTOBER 1993 switching characteristics (see Note 3) PARAMETER FROM (INPUT) VCC = 5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = 25C TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX F257 tPLH tPHL A or B Any Y tPLH tPHL A/B Any Y tPZH tPZL G Any Y tPHZ tPLZ G Any Y SN54F257 SN74F257 MAX MIN MAX MIN 4.1 6 2.2 8 2.2 7 3.8 5.5 1 8 1.2 6.5 9.7 13 3.7 15.5 3.7 15 6.1 8.5 2.7 10.5 2.7 9.5 2.2 5.5 7.5 2.2 9.5 2.2 8.5 2.2 5.1 7.5 2.2 10 2.2 8.5 1.2 3.9 6 1.2 7 1.2 7 1.2 4.1 6 1.2 9.5 1.2 7 MIN TYP 2.2 1.2 3.7 2.7 For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 3: Load circuits and waveforms are shown in Section 1. 2-4 * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * UNIT MAX ns ns ns ns 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. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. 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