This 8-bit (octal) noninverting bus transceiver uses two separate power-supply rails. The A port, VCCA, is dedicated to accepting a 5-V supply level, and the configurable B port, which is designed to track VCCB, accepts voltages from 3 V to 5 V. This allows for translation from a 3.3-V to a 5-V environment and vice versa.
The SN74LVCC4245A device is designed for asynchronous communication between data buses. The SN74LVCC4245A device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses effectively are isolated. The control circuitry (DIR, OE) is powered by VCCA.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
SN74LVCC4245A | DB (SSOP, 24) | 8.20 mm × 5.30 mm |
DW (SOIC, 24) | 15.40 mm × 7.50 mm | |
NS (SOP, 24) | 15.00 mm × 5.30 mm | |
PW (TSSOP, 24) | 7.80 mm × 4.40 mm |
Changes from Revision M (March 2005) to Revision N (December 2022)
PIN | TYPE(1) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
VCCA | 1 | — | A port power |
DIR | 2 | I | Dir input |
A1 | 3 | I/O | A1 port |
A2 | 4 | I/O | A2 port |
A3 | 5 | I/O | A3 port |
A4 | 6 | I/O | A4 port |
A5 | 7 | I/O | A5 port |
A6 | 8 | I/O | A6 port |
A7 | 9 | I/O | A7 port |
A8 | 10 | I/O | A8 port |
GND | 11 | — | Ground |
GND | 12 | — | |
GND | 13 | — | |
B8 | 14 | I/O | B8 port |
B7 | 15 | I/O | B7 port |
B6 | 16 | I/O | B6 port |
B5 | 17 | I/O | B5 port |
B4 | 18 | I/O | B4 port |
B3 | 19 | I/O | B3 port |
B2 | 20 | I/O | B2 port |
B1 | 21 | I/O | B1 port |
OE | 22 | I | Output Enable active low |
NC | 23 | — | Unconnected |
VCCB | 24 | — | B port power |