le75181 Zarlink Semiconductor, le75181 Datasheet - Page 4

• Manufacturer Part Number: le75181
• Description: Ringing Access Switch
• Manufacturer: Zarlink Semiconductor

CONNECTION DIAGRAMS
Pin Descriptions
Pin Name
R
T
LATCH
INPUT
RINGING
RINGING
D
R
F
T
R
V
T
T
V
NC
GND
LINE
GND
LINE
BAT
BAT
BAT
SD
DD
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Ground
Ground
Power
Type
Input
Input
Input
—
TRINGING
FGND
TLINE
TBAT
VDD
TSD
Digital ground.
Fault ground.
Logic level input switch control. Internally 75 k
Data latch control, active-high, transparent low. Internally 75 k
No connection.
Connect to RING on SLIC side.
Connect to RING on line side.
Connect to ringing generator.
Connect to TIP on SLIC side.
Connect to TIP on line side.
Connect to return ground for ringing generator.
Temperature shutdown pin. Can be used as a logic level input or output. See table 8, truth
table, on page 15, and the Switching Behavior section of this data sheet for input pin
description. As an output, will read HIGH when device is in its operational mode and
in the thermal shutdown mode. In the Le75181, the thermal shutdown mechanism cannot
be disabled.
Battery voltage. Used as a reference for protection circuit.
5-V supply.
NC
NC
1
2
3
4
5
6
7
8
Figure 1. 16-Pin SOIC
Zarlink Semiconductor Inc.
16-Pin SOIC
4
16
15
14
13
12
11
10
9
Description
VBAT
RBAT
RLINE
NC
RRINGING
LATCH
INPUT
DGND
Ω
typical pull down.
Ω
typical pull down.
LOW