Single-supply voltage translator (refer to LVxT Enhanced Input Voltage):
Up translation:
Down translation:
The SN74LV8T245 is an octal bus transceiver with 3-state outputs. All eight channels are controlled by the direction (DIR) pin and output enable (OE) pin. The output level is referenced to the supply voltage (VCC) and supports 1.8-V, 2.5-V, 3.3-V, and 5-V CMOS levels.
The input is designed with a lower threshold circuit to support up translation for lower voltage CMOS inputs (for example, 1.2 V input to 1.8 V output or 1.8 V input to 3.3 V output). Additionally, the 5-V tolerant input pins enable down translation (for example, 3.3 V to 2.5 V output).
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
SN74LV8T245 | RKS (VQFN, 20) | 4.50 mm × 2.50 mm |
DGS (VSSOP, 20) | 5.10 mm × 3.00 mm | |
PW (TSSOP, 20) | 6.50 mm × 4.40 mm |
Changes from Revision * (December 2022) to Revision A (April 2023)
PIN | TYPE(1) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
DIR | 1 | I | Direction control input (L = B → A, H = A → B) |
A1 | 2 | I/O | Channel 1 output/input A |
A2 | 3 | I/O | Channel 2 output/input A |
A3 | 4 | I/O | Channel 3 output/input A |
A4 | 5 | I/O | Channel 4 output/input A |
A5 | 6 | I/O | Channel 5 output/input A |
A6 | 7 | I/O | Channel 6 output/input A |
A7 | 8 | I/O | Channel 7 output/input A |
A8 | 9 | I/O | Channel 8 output/input A |
GND | 10 | G | Ground |
B8 | 11 | I/O | Channel 8 input/output B |
B7 | 12 | I/O | Channel 7 input/output B |
B6 | 13 | I/O | Channel 6 input/output B |
B5 | 14 | I/O | Channel 5 input/output B |
B4 | 15 | I/O | Channel 4 input/output B |
B3 | 16 | I/O | Channel 3 input/output B |
B2 | 17 | I/O | Channel 2 input/output B |
B1 | 18 | I/O | Channel 1 input/output B |
OE | 19 | I | Output enable, active low |
VCC | 20 | P | Positive supply |
Thermal Pad(2) | — | The thermal pad can be connected to GND or left floating. Do not connect to any other signal or supply. |