st2149 STMicroelectronics, st2149 Datasheet - Page 4

• Manufacturer Part Number: st2149
• Description: 4-bit Dual Supply Level Translator Without Direction Control Pin
• Manufacturer: STMicroelectronics

Logic diagram
2.1
4/19
Device block diagrams
Figure 3.
Figure 4.
* ST2149 has 4 channels. For simplicity, the above diag ram shows only 1 chann el.
* When OE is LOW, all I/Os are in High-Impedance mode.
ST2149
V
L
0.1 μF
ST2149 block diagram
Application block diagram
I/O
OE
L
controller
system
V
L
V
Doc ID 15949 Rev 1
L
4 kΩ
I/O
I/O
I/O
I/O
OE
V
L
4 kΩ
VL2
VL3
VL4
VL1
V
I/O
I/O
I/O
I/O
CC
V
VCC1
VCC 2
VCC3
VCC4
CC
I/O
VCC
= one-shot circuit block
controller
system
V
CC
0.1 μF 1 μF
ST2149
V
CC