fxla2203 Fairchild Semiconductor, fxla2203 Datasheet - Page 10

• Manufacturer Part Number: fxla2203
• Description: Fxla2203 Dual-mode, Dual-sim-card Level Translator
• Manufacturer: Fairchild Semiconductor

© 2010 Fairchild Semiconductor Corporation
FLXA2203 • Rev. 1.0.1
Table 2. Dual-Mode, Dual-SIM Truth Table
Voltage Translation Description
The FXLA2203 provides full voltage translation, or level
shifting, from 1.65V – 3.6V between Host 1 or Host 2
and either SIM card (according to Table 3). The host
sides reference V
each SIM slot references the external PMIC LDO
voltage level determined by the CH_Swap pin. This
Table 3. Translation Truth Table
Note:
17. V
Enable
CC
1
1
Enable
must always be greater than or equal to () V
1
1
1
1
CC_H_1
CH_Swap
and V
1
0
CC_H_2
CH_SWAP
, respectively, while
1
1
0
0
Figure 10.
SIM Slot 1 Voltage Levels
PMIC LDO1 / V
PMIC LDO2 / V
CC1
Voltage Translation
and V
10
architecture offers a flexible solution for problematic V
domain disagreements. For example, if Host 1 operates
at 1.65V and Host 2 operates at 2.5V, while slot 1 is
populated with a 3.0V SIM card and slot 2 is populated
with a 1.8V SIM card, the FXLA2203 provides seamless
voltage translation across all four V
CC1
CC2
CC2
.
Host 1  SIM Slot 1
Host 2  SIM Slot 2
Host 1  SIM Slot 2
Host 2  SIM Slot 1
Configuration
SIM Slot 2 Voltage Levels
PMIC LDO2 / V
PMIC LDO1 / V
CC
domains.
CC2
CC1
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CC