SCAS709C September   2003  – May 2024 SN74LVC257A-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Description
  4. 3 Pin Configuration and Functions
  5. 4 Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 ESD Ratings
    3. 4.3 Recommended Operating Conditions
    4. 4.4 Thermal Information
    5. 4.5 Electrical Characteristics
    6. 4.6 Switching Characteristics
    7. 4.7 Operating Characteristics
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Power Supply Recommendations
    2. 7.2 Layout
      1. 7.2.1 Layout Guidelines
      2. 7.2.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support (Analog)
      1. 8.1.1 Related Links
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • PW|16
  • BQB|16
  • D|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Pin Configuration and Functions

SN74LVC257A-Q1 D or PW Package,16-Pin SOIC or TSSOP(Top View)Figure 3-1 D or PW Package,16-Pin SOIC or TSSOP(Top View)
SN74LVC257A-Q1 BQB Package,16-Pin WQFN with Exposed Thermal Pad(Top View)Figure 3-2 BQB Package,16-Pin WQFN with Exposed Thermal Pad(Top View)
Table 3-1 Pin Functions
PIN I/O DESCRIPTION
NAME SOIC, TSSOP, or WQFN
A/B 1 I Select Pin, Low selects A, High selects B
1A 2 I/O Multiplexer Signal Input
1B 3 I/O Multiplexer Signal Input
1Y 4 I/O Multiplexer Output
2A 5 I/O Multiplexer Signal Input
2B 6 I/O Multiplexer Signal Input
2Y 7 I/O Multiplexer Output
3A 11 I/O Multiplexer Signal Input
3B 10 I/O Multiplexer Signal Input
3Y 9 I/O Multiplexer Output
4A 14 I/O Multiplexer Signal Input
4B 13 I/O Multiplexer Signal Input
4Y 12 I/O Multiplexer Output
GND 8 — Ground
NC(1) — — No connect
OE 15 I/O Active low Output enable
VCC 16 — Power pin
(1) NC – no internal connection