Le75183
Pin Descriptions .
Pin Name
D
GND
F
GND
INRING
INTESTIN
INTESTOUT
LATCH
NC
R
BAT
R
LINE
R
RINGING
RTESTin
RTESTout
T
BAT
T
LINE
T
RINGING
TTESTin
TTESTout
Type
Ground
Ground
Input
Input
Input
Input
—
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Digital ground.
Fault ground.
Logic level switch input control. Internally 75 k
Ω
typical pull up.
Logic level switch input control. Internally 75 k
Ω
typical pull down.
Logic level switch input control. Internally 75 k
Ω
typical pull up.
Description
Data Sheet
Data input control, active-high, transparent low. Internally 75 k
Ω
typical pull down.
No connection.
Connect to RING on SLIC side.
Connect to RING on line side.
Connect to ringing generator.
Test (in) access on RING.
Test (out) access on RING.
Connect to TIP on SLIC side.
Connect to TIP on line side.
Connect to return ground for ringing generator.
Test (in) access on TIP.
Test (out) access on TIP.
Temperature shutdown pin. Can be used as a logic level input or an output. See Tables 12
and 13, Truth Tables, and the Switching Behavior section of this data sheet for input pin
description. As an output flag, will read HIGH when the device is in its operational mode
and LOW in the thermal shutdown mode. To disable the thermal shutdown mechanism, tie
this pin to HIGH (not recommended)
Battery voltage. Used as a reference for protection circuit.
5 V supply.
Exposed pad in QFN package. No internal electrical connection. Not recommended to
make any external electrical connection (such as VBAT or ground) to the EPAD.
T
SD
Input/Output
V
BAT
V
DD
EPAD
Battery
Power
—
D: Internally 75 kΩ typical pull down.
U: Internally 75 kΩ typical pull up.
6
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
