SCAS291W MARCH 1993 – October 2016 SN54LVC138A , SN74LVC138A
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Parameter Measurement Information
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
5 Pin Configuration and Functions
SN54LVC138A...RSV PACKAGE
(TOP VIEW)
GQN OR ZQN PACKAGE
(TOP VIEW)
Table 1. Pin Assignments for ZQN (BGA)
| 1 | 2 | 3 | 4 | |
|---|---|---|---|---|
| A | B | A | VCC | Y0 |
| B | C | NC(1) | NC(1) | Y1 |
| C | G2B | G2A | Y3 | Y2 |
| D | G1 | NC(1) | NC(1) | Y4 |
| E | GND | Y7 | Y6 | Y5 |
(1) NC - No internal connection
Pin Functions
| PIN | DESCRIPTION | ||||
|---|---|---|---|---|---|
| NAME | SOIC, SSOP, TVSOP, SO, TSSOP, VQFN, UQFN | LCCC | BGA MICROSTAR JUNIOR |
I/O | |
| A | 1 | 2 | A2 | I | Select input A (least significant bit) |
| B | 2 | 3 | A1 | I | Select input B |
| C | 3 | 4 | B1 | I | Select input C (most significant bit) |
| G2A | 4 | 5 | C2 | I | Active low enable A |
| G2B | 5 | 7 | C1 | I | Active low enable B |
| G1 | 6 | 8 | D1 | I | Active high enable |
| GND | 8 | 10 | E1 | — | Ground |
| NC | — | 1, 11, 16 | B2, B3, D2, D3 | — | No internal connection |
| VCC | 16 | 20 | A3 | — | Supply voltage |
| Y0 | 15 | 19 | A4 | O | Output 0 (least significant bit) |
| Y1 | 14 | 18 | B4 | O | Output 1 |
| Y2 | 13 | 17 | C4 | O | Output 2 |
| Y3 | 12 | 15 | C3 | O | Output 3 |
| Y4 | 11 | 14 | D4 | O | Output 4 |
| Y5 | 10 | 13 | E4 | O | Output 5 |
| Y6 | 9 | 12 | E3 | O | Output 6 |
| Y7 | 7 | 9 | E2 | O | Output 7 (most significant bit) |