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SN74HC257DB on a board, in 3D

SN74HC257DB

Texas Instruments

Extended
JLCPCBLCSCti/SN74HC257DB
Category
Signal Switches, Multiplexers, Decoders
Package
SSOP-16
Pins
5

Overview

The SN74HC257DB is a signal Switches, Multiplexers, Decoder made by Texas Instruments in a SSOP-16 package with 16 pins.

PCBKit's library has its KiCad symbol (74xx:74LS257, from KiCad's library) and its footprint (Package_SO:SSOP-16_5.3x6.2mm_P0.65mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C3216765).

Symbol

S1I0a2I1a3Za4I0b5I1b6Zb7GND8Zd9I1d10I0d11Zc12I1c13I0c14OE15VCC16
74xx:74LS257From KiCad's library

Footprint

12345678910111213141516
Package_SO:SSOP-16_5.3x6.2mm_P0.65mmFrom KiCad's library

Order codes

1

Pinout

16
The pins of the SN74HC257DB
PinNameType
1SInput
2I0aInput
3I1aInput
4ZaTri-state
5I0bInput
6I1bInput
7ZbTri-state
8GNDPower in
9ZdTri-state
10I1dInput
11I0dInput
12ZcTri-state
13I1cInput
14I0cInput
15OEInput
16VCCPower in

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A picture
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A picture that opens the part, for a README
[![SN74HC257DB](https://pcbkit.io/embed/parts/ti/SN74HC257DB.jpg?size=s)](https://pcbkit.io/parts/ti/SN74HC257DB)

Questions

Is there a KiCad symbol and footprint for the SN74HC257DB?

Yes. The symbol is 74xx:74LS257 and the footprint Package_SO:SSOP-16_5.3x6.2mm_P0.65mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the SN74HC257DB?

SSOP-16, with 16 pins. Its footprint is drawn on this page.

Where can I order the SN74HC257DB?

JLCPCB lists it as part C3216765, with 0 in stock; the sellers' links on this page open their listings.

What can replace the SN74HC257DB?

Parts like it in the library: the SN74LV157ADB by Texas Instruments, the AS5040-ASST by Advanced Monolithic Systems, the SN74AHC139DB by Texas Instruments and the SN74AHCT139DB by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

8