ADP3405

–5–

REV. 0

ABSOLUTE MAXIMUM RATINGS

*

Voltage on Any Pin with Respect

to Any GND Pin . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +10 V

Voltage on Any Pin May Not Exceed VBAT,

with the Following Exceptions: VRTC, VSIM,

CAP+, PWRONIN, I/O, CLK, RST

Storage Temperature Range . . . . . . . . . . . . –65

Operating Temperature Range . . . . . . . . . . . –20

Maximum Junction Temperature . . . . . . . . . . . . . . . . . 125

θ

Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 300

*This is a stress rating only, operation beyond these limits can cause the device to

be permanently damaged.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the ADP3405 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

PIN CONFIGURATION

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

ADP3405

CHRON

ROWX

PWRONIN

ANALOGON

PWRONKEY

VCC

VBAT

RESCAP

DGND

VTCXO

RESET

AGND

VCCA

REFOUT

VRTC

CAP–

SIMBAT

DATAIO

RESETIN

CLKIN

SIMGND

CAP+

VSIM

CLK

SIMON

I/O

RST

SIMPROG

TSSOP-28

(Not To Scale)

PIN FUNCTION DESCRIPTIONS

Pin

Mnemonic

Function

1

RESCAP

Reset Delay Timing Cap

2

DGND

Digital Ground

3

VTCXO

Crystal Oscillator Low Dropout

Regulator

4

RESET

Main Reset

5

REFOUT

Reference Output

6

VCCA

Analog Low Dropout Regulator

7

AGND

Analog Ground

8

VBAT

Battery Input Voltage

9

VCC

Digital Low Dropout Regulator

10

PWRONKEY

Power-On/-Off Key

11

ANALOGON

VTCXO Enable

12

PWRONIN

Power-On/-Off Signal from

Microprocessor

13

ROWX

Microprocessor Keyboard Output

14

CHRON

Charger On/Off Input

15

VRTC

Real-Time Clock Supply/Coin

Cell Battery Charger

16

CAP–

Negative Side of Boost Capacitor

17

SIMBAT

Battery Input for the SIM

Charge Pump

18

DATAIO

Non-Level-Shifted Bidirectional

Data I/O

19

RESETIN

Non-Level-Shifted SIM Reset

20

CLKIN

Non-Level-Shifted Clock

21

SIMGND

Charge Pump Ground

22

I/O

Level-Shifted Bidirectional SIM

Data Input/Output

23

RST

Level-Shifted SIM Reset

24

SIMPROG

VSIM Programming:

Low = 3 V, High = 5 V

25

SIMON

VSIM Enable

26

CLK

Level-Shifted SIM Clock

27

VSIM

SIM Supply

28

CAP+

Positive Side of Boost Capacitor

ORDERING GUIDE

Temperature

Package

Package

Model

Range

Description

Option

ADP3405ARU –20