AN2433 Freescale Semiconductor / Motorola, AN2433 Datasheet - Page 16

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

AN2433/D
16
3.3V system
3.3V system
3.3V system
3.3V system
VDD 3.3V
VDD 3.3V
GND
GND
IN/OUT
IN/OUT
GND
GND
OUT
OUT
OUT
OUT
I/O
I/O
Figure 14. MCU to 5V system interfacing without 5V supply
Figure 13. 3.3V MCU to 5V system bi-directional interface
V
V
GND
GND
DD
DD
The NCN6010/1 level translators (respectively with and without charge pump)
allow the interfacing of more than one signal. Those devices are originally
targeted for interfacing 5V SIM cards to 3.3V microprocessors or GSM
controllers, see
2 unidirectional lines. The NCN6010 also contains a charge pump to facilitate
3V / 5V conversion.
VDD 3.3V
VDD 3.3V
3.3V
3.3V
Freescale Semiconductor, Inc.
For More Information On This Product,
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3
3
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2
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5
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7
7
5V to 3V Design Considerations
VL
VL
I/O VL
I/O VL
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U1
U1
VDD
VDD
STOP
STOP
MOD_VCC
MOD_VCC
PWR_ON
PWR_ON
I/O
I/O
CLOCK
CLOCK
RESET
RESET
U1
U1
NCN6010
NCN6010
Figure 14
GND
GND
SIM_VCC
SIM_VCC
SIM_CLK
SIM_CLK
SIM_RST
SIM_RST
SIM_IO
SIM_IO
. These level translators have 1 bi-directional line and
I/O VCC
I/O VCC
GND
GND
MAX3370
MAX3370
Cta
Cta
Ctb
Ctb
VCC
VCC
14
14
13
13
12
12
11
11
9
9
8
8
10
10
220n
220n
GND
GND
C1
C1
5
5
4
4
V
V
GND
GND
DD
DD
C2
C2
1u
1u
5V
5V
5V system
5V system
I/O
I/O
IN/OUT
IN/OUT
IN
IN
IN
IN
GND
GND
VDD 5V
VDD 5V
5V system
5V system
GND
GND
MOTOROLA