u3762mb ETC-unknow, u3762mb Datasheet - Page 7

• Manufacturer Part Number: u3762mb
• Description: Universal Telephone Functions Integrated
• Manufacturer: ETC-unknow

Rev. A1, 15-Sep-98
Pin
30
31
32
33
34
35
36
37
Symbol
VRING
TEST
VDD
RCK
OUT
HKS
n.c.
KT
DC supply voltage for the tone ringer is lim-
ited to 30 V with integrated Z-diode.
RC clock oscillator for ringer
Buzzer output
Supply output for dialer part
TEST input with 6.25 k
Not connected
Hook switch input.
HKS = 0: On-hook state. Chip in sleep mode,
no operation (with a pull-down resistor of
about 400 k
HKS = 1: Off-hook state. Chip enable for
normal operation.
Keytone output only sent out in pulse mode
W
)
Preliminary Information
.
Function
W
pull-up resistor
TEST
HKS
VRING
VRING
VDD
KT
OUT
OUT
RCK
Ê
PD
PD
PD
PD
Configuration
PD
Ê
Ê
PD
VDD
VDD
6V
50V
Ê
30V
30V
50V
PD
U3762MB
6V
6V
PD
VDD
Ê Ê
Ê
PD
Ê
Ê
VDD
6.5K
6.5K
3.4V
6V
VDD
Ê Ê
Ê Ê
VDD
Ê
VDD
0.8V
Ê
Ê
200
7 (23)
200
VL