The 74AHC/AHCT157 are high-speed Si-gate CMOS devices and are pin compatible with Low Power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.
The 74AHC/AHCT157 are quad 2-input multiplexer which select 4 bits of data from two sources under the control of a common data select input (S). The enable input (E) is active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all other input conditions.
Moving the data from two groups of registers to four common output buses is a common use of the 74AHC/AHCT157. The state of the common data select input (S) determines the particular register from which the data comes. It can also be used as function generator. The device is useful for implementing highly irregular logic by generating any four of the 16 different functions of two variables with one variable common. The 74AHC/AHCT157 is logic implementation of a 4-pole, 2-position switch, where the position of the switch is determine by the logic levels applied to S.
The logic equations are:
The 74AHC/AHCT157 is identical to the 74AHC/AHCT158 but has non-inverting (true) outputs.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| 74AHC157D | 74AHC157D,112 | 9352 639 98112 | Volume production | SOT109 | Tube | Standard Marking | |
| 74AHC157D | 74AHC157D,118 | 9352 639 98118 | Volume production | SOT109 | Reel Pack, SMD, 13" | Standard Marking | |
| 74AHC157PW | 74AHC157PW,112 | 9352 639 99112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| 74AHC157PW | 74AHC157PW,118 | 9352 639 99118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking | |
| 74AHCT157D | 74AHCT157D,112 | 9352 640 00112 | Volume production | SOT109 | Tube | Standard Marking | |
| 74AHCT157D | 74AHCT157D,118 | 9352 640 00118 | Volume production | SOT109 | Reel Pack, SMD, 13" | Standard Marking | |
| 74AHCT157PW | 74AHCT157PW,112 | 9352 640 01112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| 74AHCT157PW | 74AHCT157PW,118 | 9352 640 01118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| 74AHC157D | 74AHC157D,112 | 74AHC157D |
| Always Pb-free | 6,62 | 1,51E+08 | 1 | |
| 74AHC157D | 74AHC157D,118 | 74AHC157D |
| Always Pb-free | 6,62 | 1,51E+08 | 1 | |
| 74AHC157PW | 74AHC157PW,112 | 74AHC157PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74AHC157PW | 74AHC157PW,118 | 74AHC157PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74AHCT157D | 74AHCT157D,112 | 74AHCT157D |
| Always Pb-free | 6,62 | 1,51E+08 | 1 | |
| 74AHCT157D | 74AHCT157D,118 | 74AHCT157D |
| Always Pb-free | 6,62 | 1,51E+08 | 1 | |
| 74AHCT157PW | 74AHCT157PW,112 | 74AHCT157PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74AHCT157PW | 74AHCT157PW,118 | 74AHCT157PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 |
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| 74AHC157D | 9352 639 98112 | 74AHC157D,112 | 0.2300 | not available | ||||||
| 74AHC157D | 9352 639 98118 | 74AHC157D,118 | 0.2300 | Order samples | ||||||
| 74AHC157PW | 9352 639 99112 | 74AHC157PW,112 | 0.2300 | not available | ||||||
| 74AHC157PW | 9352 639 99118 | 74AHC157PW,118 | 0.2300 | Order samples | ||||||
| 74AHCT157D | 9352 640 00112 | 74AHCT157D,112 | 0.2400 | Order samples | ||||||
| 74AHCT157D | 9352 640 00118 | 74AHCT157D,118 | 0.2400 | not available | ||||||
| 74AHCT157PW | 9352 640 01112 | 74AHCT157PW,112 | 0.2400 | not available | ||||||
| 74AHCT157PW | 9352 640 01118 | 74AHCT157PW,118 | 0.2400 | not available |
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74AHC157D | SOT109
| Quad 2-Input Multiplexer | 3.2@5V | 2.0-5.5 V | 16 | Low Power or Battery Applications | CMOS | +/- 8 mA |
| 74AHC157PW | SOT403-1
(TSSOP16) | Quad 2-Input Multiplexer | 3.2@5V | 2.0-5.5 V | 16 | Low Power or Battery Applications | CMOS | +/- 8 mA |
| 74AHCT157D | SOT109
| Quad 2-Input Multiplexer; TTL Enabled | 3.4 | 4.5-5.5 V | 16 | Low Power | TTL | +/- 8 mA |
| 74AHCT157PW | SOT403-1
(TSSOP16) | Quad 2-Input Multiplexer; TTL Enabled | 3.4 | 4.5-5.5 V | 16 | Low Power | TTL | +/- 8 mA |
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