FXLA2203 Datasheet, PDF (14/16 Pages) Fairchild Semiconductor – Dual-Mode, Dual-SIM-Card Level Translator

SIM Slot Signals: Active vs. 3-State
The individual SIM slot signals (CLK, RST, and I/O) are
active only if the appropriate VCCn and VCC_H_n
supplies are active (1.65V – 3.6V).
For example, if EN=1 and CH_Swap is 1, SIM Slot 1
signals (CLK_1, RST_1, and I/O_1) are active only if
VCC1 and VCC_H_1 are both active (1.65V – 3.6V).
VCC1 sets the voltage levels of CLK_1, RST_1, and
I/O_1. If either VCC1 or VCC_H_1 is below 1.65V, SIM
Slot 1 signals (CLK_1, RST_1, and I/O_1) are high
impedance. Likewise, SIM Slot 2 signals (CLK_2,
RST_2, and I/O_2) are active only if both VCC2 and
VCC_H_2 are active (1.65V – 3.6V). VCC2 sets the
voltage levels of CLK_2, RST_2, and I/O_2.
If EN=1 and CH_Swap is 0, SIM Slot 1 (CLK_1, RST_1,
and I/O_1) signals are active only if VCC2 and
VCC_H_2 are active (1.65V – 3.6V). VCC2 sets the
voltage levels of CLK_1, RST_1, and I/O_1. Likewise,
SIM Slot 2 signals (CLK_2, RST_2, and I/O_2) are
active only if both VCC1 and VCC_H_1 are active
(1.65V – 3.6V). VCC1 sets the voltage levels of CLK_2,
RST_2, and I/O_2.
For a complete listing of all the possible power switch
and signal combinations, see Table 8.
Table 8. Complete Power Switch and Signal Truth Table
Inputs
Outputs
Condition
VCC EN CH_SWAP
1
OFF X
X
2
ON L
X
3
ON H
1
4
ON H
1
5
ON H
1
6
ON H
1
7
ON H
1
8
ON H
1
9
ON H
1
10
ON H
1
11
ON H
1
12
ON H
1
13
ON H
1
14
ON H
1
15
ON H
1
16
ON H
1
17
ON H
1
18
ON H
1
19
ON H
0
20
ON H
0
21
ON H
0
22
ON H
0
23
ON H
0
24
ON H
0
25
ON H
0
26
ON H
0
27
ON H
0
28
ON H
0
29
ON H
0
30
ON H
0
31
ON H
0
32
ON H
0
33
ON H
0
34
ON H
0
Notes:
29. ON=1.65V – 3.6V.
30. OFF=Powered down or 0V.
31. X=Don’t Care.
32. V_CC > V_CC1 and V_CC2.
© 2010 Fairchild Semiconductor Corporation
FXLA2203 • Rev. 1.0.5
VCC_H_1
X
X
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
VCC_H_2 VCC1
X
X
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
X
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
14
VCC2
OFF
X
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
CLK_1,
RST_1,
I/O_1
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
A
Z
A
Z
A
Z
A
Z
Z
Z
Z
Z
Z
A
A
Z
Z
Z
Z
Z
Z
A
A
CLK_2,
RST_2,
I/O_2
Z
Z
Z
Z
Z
Z
Z
Z
A
A
Z
Z
Z
Z
Z
Z
A
A
Z
Z
Z
Z
Z
Z
Z
Z
Z
A
Z
A
Z
A
Z
A
VCC_Card1 VCC_Card2
OFF
Z
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
Z
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
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