AN2433 Freescale Semiconductor / Motorola, AN2433 Datasheet - Page 13

• Manufacturer Part Number: AN2433
• Description: 5V to 3V Design Considerations
• Manufacturer: Freescale Semiconductor / Motorola

MOTOROLA
V
V
V
V
D D
D D
M C U
M C U
D D
D D
3 .3 V
3 .3 V
3 .3 V
3 .3 V
V
V
S S
S S
Figure 10. 3.3V MCU Output to 5V CMOS Input with level shifter
M C U
M C U
N
N
P
P
O u t p u t
O u t p u t
Another possible solution for interfacing a 3.3V MCU output to a 5V CMOS
input is to use ACT, HCT, VHCT or VHC1GT (1 gate VHCT) logic families. By
using these parts, a 3.3V MCU output can be connected directly to a CMOS
input, see
Figure 9. 3.3V MCU Output to 5V CMOS Input
Freescale Semiconductor, Inc.
For More Information On This Product,
P
P
N
N
V
V
O u tp u t
O u tp u t
S S
S S
Figure 10
5V to 3V Design Considerations
Go to: www.freescale.com
D
D
.
M C 7 4 V H C 1 G T 5 0
M C 7 4 V H C 1 G T 5 0
V
V
D D
D D
V
V
5 V
5 V
D D
D D
R
R
5 V
5 V
V
V
S S
S S
In p u t
In p u t
C M O S
C M O S
L o g ic
L o g ic
In p u t
In p u t
V
V
D D
D D
C M O S
C M O S
L o g ic
L o g ic
5 V
5 V
P
P
N
N
Microcontroller Outputs
P
P
N
N
V
V
S S
S S
AN2433/D
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