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參數(shù)資料
| 型號(hào)： | FXLP4555MPX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, QCC16 |
| 封裝： | 3 X 3 MM, MO-220, MLP-16 |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 987K |
| 代理商： | FXLP4555MPX |
2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FXLP4555 Rev. 1.0.0
3
FXLP4555
—
1.8V
/
3
.0V
SIM
Card
Power
Supply
an
d
Level
Shifter
Pin Configuration
16
15
14
13
1
2
3
4
12
11
10
9
8
7
6
5
FXLP4555
Exposed DAP
(GND)
EN
VSEL
VCCA
NC
RST_C
GND
CLK_C
NC
Figure 3. Pin Assignments (Top View)
Pin Definitions
Pin
Name
Type
Description
1
EN
INPUT
Power-Down Mode. EN=LOW → low-current Shutdown Mode activated. EN=HIGH →
normal operation. A LOW level on this pin resets the SIM interface, switching off the
VCC_C.
2
VSEL
INPUT
The signal present on this pin programs the SIM_VCC value:
VSEL=LOW → SIM_VCC=1.8V; VSEL=HIGH → SIM_VCC=3V.
3
VCCA
POWER
Connected to the baseband power supply; this pin configures the level shifter input
stage to accept signals from the baseband. A 0.1F capacitor is used to bypass the
power supply voltage. When VCCA is below 1.1V (typical), the VCC_C (SIM Card VCC) is
disabled and FXLP4555 enters Shutdown Mode.
4
NC
No connect. It is recommended to solder to PCB GND.
5
VBAT
POWER
LDO converter supply input. The input voltage ranges from 2.7V to 5.5V. This pin
needs to be bypassed by a 0.1F capacitor.
6
NC
No connect. It is recommended to solder to PCB GND.
7
VCC_C
POWER
Connected to the SIM card power supply pin. An internal LDO converter is
programmable by the external baseband to supply either 1.8V or 3.0V output voltage.
An external 1.0F minimum ceramic capacitor must be connected across VCC_C and
GND. During a normal operation, the VCC_C voltage can be set to 1.8V, followed by a
3.0V value, or can start directly at either of these values.
8
I/O_C
INPUT/
OUTPUT
Handles the connection to the serial I/O of the card connector. A bi-directional level
translator adapts the serial I/O signal between the card and the baseband. A 14k
(typical) pull-up resistor provides a high-impedance state for the SIM card I/O link.
9
RST_C
OUTPUT
Connected to the RESET pin of the card connector. A level translator adapts the
external reset (RST) signal to the SIM card.
10
GND
GROUND
Ground reference for the integrated circuit and associated signals. Care must be
taken to avoid voltage spikes when the device operates in normal operation.
11
CLK_C
OUTPUT
Connected to the CLOCK pin of the card connector. The CLOCK (CLK) signal comes
from the external clock generator; the internal level shifter adapts the voltage defined
for the VCC_C.
12
NC
No connect. It is recommended to solder to PCB GND.
13
CLK_H
INPUT
The clock signal, coming from the external controller, must have a duty cycle within
the range defined by the specification (typically 50%). The built-in level shifter
translates the input signal to the external SIM card CLK input.
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