U3750BM
TELEFUNKEN Semiconductors
Parameters
Serial bus (see figure 12)
Pulse width clock
Pulse width enable signal
Set-up time data to clock
Hold time data from clock
Enable time
Time between two trans-
missions
Test Conditions / Pins
Symbol
t , t
Min.
Typ.
Max.
Unit
2
2
0
100
0
900
s
s
s
s
s
s
wl wh
t , t
el eh
t
set up
t
e
t
RRN
Pulse dialing (OL)
Dialing pulse frequency
In mode 60/40 (Pin 4 tied to
RESET)
In mode 66/33 (Pin 4 not
connected)
10
Hz
Hz
10.11
Dialing pulse period
Break time
T
t
100
98.9
60
66
40
ms
ms
ms
ms
ms
ms
ms
ms
ms
OL
t
b
Make time
m
33
Interdigit time
Transmission mute:
t
830
813
[n 100
+ 30]
[n 98.8
+ 22]
833
816.5
(n 100)
+ 32
(n 98.9)
+ 24.2
IDOL
t
= (t + t ) n + t
mol
m b m1
n pulses dialling
ms
Flash pulse
Flash pulse duration
Pin 3 to GND Pin 4 to RESET
Pin 3 to GND Pin 4 to NC
Pin 3 to GND Pin 4 to GND
Pin 3 to NC Pin 4 to RESET
Pin 3 to NC Pin 4 to NC
Pin 3 to NC Pin 4 to GND
Pin 3 to RESET Pin 4 to RE-
SET
Pin 3 to RESET Pin 4 to NC
Pin 3 to RESET Pin 4 to GND
In mode 60/40
In mode 66/33
In mode DTMF
t
89.5
98.5
92
101
105
242
266
277
112
123
128
832
815.5
848.5
fl
102.5
239.5
263.5
274.0
109.5
120.5
125.0
830
ms
Transmission mute
Pause time
tm
fl
813
846
In mode 60/40
In mode 66/33
In DTMF mode
3116
3075
3012
3118
3077
3110
T
ms
p
Rev. A1: 16.07.1996
11 (20)
TEMIC [ TEMIC SEMICONDUCTORS ]
