SN74LS257 ON Semiconductor, SN74LS257 Datasheet
SN74LS257
Available stocks
Related parts for SN74LS257
SN74LS257 Summary of contents
Page 1
... SN74LS257B SN74LS258B Quad 2-Input Multiplexer with 3-State Outputs The LSTTL / MSI SN74LS257B and the SN74LS258B are Quad 2-Input Multiplexers with 3-state outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (non-inverted) form. The ...
Page 2
... SN74LS257B SN74LS258B CONNECTION DIAGRAM DIP (TOP VIEW SN74LS257B GND SN74LS258B ...
Page 3
... PIN GND = PIN PIN NUMBERS a SN74LS257B SN74LS258B LOGIC DIAGRAMS SN74LS257B SN74LS258B http://onsemi ...
Page 4
... H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care (Z) = High Impedance (off) SN74LS257B SN74LS258B When the Output Enable Input (E are forced to a high impedance “off” state. If the outputs are tied together, all but one device must be in the high impedance state to avoid high currents that would exceed the maximum ratings ...
Page 5
... Propagation Delay, Select to Output t PHL t Output Enable Time to HIGH Level PZH t Output Enable Time to LOW Level PZL t Output Disable Time to LOW Level PLZ t Output Disable Time from HIGH Level PHZ SN74LS257B SN74LS258B (unless otherwise specified) Limits Min Typ Max Unit 2.0 V 0.8 V – 0.65 – 1.5 V 2.4 3 ...
Page 6
... SN74LS257B SN74LS258B PACKAGE DIMENSIONS –A– SEATING –T– PLANE 0.25 (0.010 SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE R NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL ...
Page 7
... G K –T– SEATING PLANE 0.25 (0.010 SN74LS257B SN74LS258B PACKAGE DIMENSIONS D SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE 0.25 (0.010 http://onsemi.com 7 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14 ...
Page 8
... Email: ONlit–french@hibbertco.com English Phone: (+1) 303–308–7142 (M–F 1:30pm to 5:00pm UK Time) Email: ONlit@hibbertco.com SN74LS257B SN74LS258B ASIA/PACIFIC: LDC for ON Semiconductor – Asia Support Phone: 303–675–2121 (Tue–Fri 9:00am to 1:00pm, Hong Kong Time) Toll Free from Hong Kong 800–4422–3781 Email: ONlit– ...