General view

74LS257

IPRS Băneasa

Also known as
54LS257
Year
Unknown
Category
Components
Type
Integrated circuits
Documentation score
1/5
Last edited
23 OCT 2026

Specifications

Type
TTL digital integrated circuit
Function
quad data selectors/multiplexers (noninverted 3-state outputs)
Package
MP-117
Logic family
TTL-LS
Operating temperature range
−55…+125 °C, 0…+70 °C (see Variants)
Supply voltage (VS)
4.50…5.50 V, 4.75…5.25 V (see Variants)

Sources: [1][2]

Variants (2)

Note
54LS257−55…+125 °C4.50…5.50 Vpreliminary data
74LS2570…+70 °C4.75…5.25 Vpreliminary data

Click a column heading to sort. „+” adds a variant to the comparison (74LS257).

Description

The 74LS257 is a TTL-LS digital integrated circuit of the 54/74LS series of IPRS Băneasa: quad data selectors/multiplexers (noninverted 3-state outputs) [1].

The I.P.R.S. Băneasa Full Line Condensed Catalog (1990) lists the 54LS257 and 74LS257 (both marked as preliminary data), as quad data selectors/multiplexers (noninverted 3-state outputs) in an MP-117 package [1]. By the catalog’s table of families, the 74LS257 works at 0…+70 °C from a 4.75…5.25 V supply, and the 54LS257 at −55…+125 °C from 4.50…5.50 V [2].

Gallery

IPRS Băneasa 74LS257: Pinout (1990 catalogue)No image available
Pinout (1990 catalogue)
IPRS Băneasa 74LS257: MP-117 case outline (dimensions in mm)No image available
MP-117 case outline (dimensions in mm)

Documents

No documents available yet.

References

  1. [1]I.P.R.S. Băneasa – „Full Line Condensed Catalog”, 1990, section 1 „Digital integrated circuits”, „T.T.L. families”, p. 1-25
  2. [2]I.P.R.S. Băneasa – „Full Line Condensed Catalog”, 1990, section 1 „Digital integrated circuits”, „General informations”, „Basic characteristics”, p. 1-XX