TXS4558 Datasheet, PDF (2/18 Pages) Texas Instruments – Dual-SIM Card Power Supply with Level Translator and Dedicated Dual LDO

TXS4558
SLLSE93A – SEPTEMBER 2011 – REVISED SEPTEMBER 2011
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
T_A
–40°C to 85°C
ORDERING INFORMATION⁽¹⁾
PACKAGE ⁽²⁾
ORDERABLE PART NUMBER
QFN – RUK
Tape and reel
TXS4558RUKR
TOP-SIDE MARKING
ZTG
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
INTERFACING THE SIM CARD
V_CC
V_BATT
Control I/P’s
Baseband
RST
I/O
CLK
Control
Logic
MUX
LDO
Translator
LDO
Translator
3V or 1.8V, 50mA
Vcc
RST
CLK
NC
3V or 1.8V, 50mA
Vcc
RST
CLK
NC
3V/1.8V SIM Card
GND
Vpp
I/O
NC
3V/1.8V SIM Card
GND
Vpp
I/O
NC
NO.
NAME
1 VSIM2
2 V_CC
3 V_BATT
4 VSIM1
5 SIM1CLK
6 SIM1RST
7 SIM1I/O
8 I/O
9 RST
10 CLK
11 EN1
12 VSEL1
13 CSEL
TYPE ⁽²⁾
O
P
P
O
O
O
I/O
I/O
I
I
I
I
I
PIN FUNCTIONS⁽¹⁾
POWER DOMAIN
DESCRIPTION
V_BATT
—
1.8 V/2.95 V supply voltage to SIM2
1.8-V power supply for device operation and I/O buffers toward baseband
—
Battery power supply
VBATT
1.8 V/2.95 V supply voltage to SIM1
VSIM1
SIM1 clock
VSIM1
SIM1 reset
VSIM1
SIM1 data
V_CC
UICC/SIM data
V_CC
UICC/SIM reset from baseband
V_CC
UICC/SIM clock
V_CC
Enable pin for SIM1 interface
V_CC
Select pin for 1.8V or 2.95V LDO1 output
V_CC
Channel select between SIM1 or SIM2
(1) Thermal Pad must be electrically connected to Ground Plane.
(2) G = Ground, I = Input, O = Output, P = Power
2
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