SN74F257DG4


      


 
 
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 − 55°C to 125°C. The SN74F257 is characterized for operation from 0°C to 70°C. 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C SN74F257 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −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 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 µA −50 µA 0.1 0.1 mA 20 20 µA − 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 = 25°C. ‡ 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 Ω, R2 = 500 Ω, TA = 25°C TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, 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 PACKAGE MATERIALS INFORMATION www.ti.com 3-Jun-2022 TAPE AND REEL INFORMATION REEL DIMENSIONS TAPE DIMENSIONS K0 P1 B0 W Reel Diameter Cavity A0 B0 K0 W P1 A0 Dimension designed to accommodate the component width Dimension designed to accommodate the component length Dimension designed to accommodate the component thickness Overall width of the carrier tape Pitch between successive cavity centers Reel Width (W1) QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE Sprocket Holes Q1 Q2 Q1 Q2 Q3 Q4 Q3 Q4 User Direction of Feed Pocket Quadrants *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74F257DR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1 SN74F257NSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 3-Jun-2022 TAPE AND REEL BOX DIMENSIONS Width (mm) W L H *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74F257DR SN74F257NSR SOIC D 16 2500 340.5 336.1 32.0 SO NS 16 2000 356.0 356.0 35.0 Pack Materials-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 3-Jun-2022 TUBE T - Tube height L - Tube length W - Tube width B - Alignment groove width *All dimensions are nominal Device Package Name Package Type Pins SPQ L (mm) SN74F257D D SOIC 16 40 507 SN74F257N N PDIP 16 25 506 SN74F257N N PDIP 16 25 506 13.97 Pack Materials-Page 3 W (mm) T (µm) B (mm) 8 3940 4.32 13.97 11230 4.32 11230 4.32 IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable standards, and any other safety, security, regulatory or other requirements. These resources are subject to change without notice. TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource. Other reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims, damages, costs, losses, and liabilities arising out of your use of these resources. TI’s products are provided subject to TI’s Terms of Sale or other applicable terms available either on ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated