ST M74HCT157 Quad 2-Channel Multiplexer Data Sheet
Summary
The M74HCT157 is a high-speed CMOS quad 2-channel multiplexer designed for reliable data selection in complex digital systems. This manual provides comprehensive technical specifications, detailing its core functionality as an IC with common select and strobe inputs. Users—including electrical engineers and hardware designers—will find detailed information on operating conditions, performance characteristics such as propagation delays ($\text{t}_{PLH}$, $\text{t}_{PHL}$), voltage levels (4.5V to 5.5V required), power consumption, and physical packaging options for seamless integration into circuit boards.
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M74HCT157
QUAD 2 CHANNEL MULTIPLEXER
HIGH SPEED: t PD = 16ns (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC = 4µA(MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS : VIH = 2V (MIN.) VIL = 0.8V (MAX)
SYMMETRICAL OUTPUT IMPEDANCE: SOP TSSOPDIP
|IOH| = IOL = 4m A (MIN) BALANCED PROPAGATION DELAYS: t PLH ≅ t PHL ORDER CODES PIN AND FUNCTION COMPATIBLE WITH
PACKAGE TUBE T & R
74 SERIES 157
DIP M74HCT157B1R SOP M74HCT157M1R M74HCT157RM13TR
DESCRIPTION
TSSOP M74HCT157TTR
The M74HCT157 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER fabricated with silicon gate C2MOS technology.
whether the A or B inputs get routed to their
This device consists of four 2-input digital corresponding Y outputs. multiplexer with common select and strobe inputs.
All inputs are equipped with protection circuits
When the STROBE(ST) input is held high, against static discharge and transient excess selection of data is inhibited and all the outputs
voltage.
become low. The SELECT decoding determines
PIN CONNECTION AND IEC LOGIC SYMBOLS
1/9September 2001
Page Summary Contents For ST M74HCT157 Quad 2-Channel Multiplexer Data Sheet
Manual Details
| Brand | QUAD |
|---|---|
| Pages | 9 |
| File Size | 248.52 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
How is the data selection process controlled by this multiplexer?
The common SELECT input determines the selected data, and the STROBE input controls when the data output becomes active.
Is the M74HCT157 compatible with TTL logic inputs?
Yes, it is specified as being compatible with TTL outputs operating at V=2V (minimum) and V=0.8V (maximum).
What are the typical signal propagation delays for this chip?
The typical propagation delays range from 16ns for transitions up to 38ns depending on whether SELECT or STROBE is the triggering input.