U3750BM Datasheet, PDF (11/20 Pages) TEMIC Semiconductors – One Chip Telephone Circuit

TELEFUNKEN Semiconductors
U3750BM
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
Pulse dialing (OL)
Dialing pulse frequency
Dialing pulse period
Test Conditions / Pins
In mode 60/40 (Pin 4 tied to
RESET)
In mode 66/33 (Pin 4 not
connected)
Break time
Make time
Interdigit time
Transmission mute:
t_mol = (t_m + t_b) @ n + t_m1
n pulses dialling
Flash pulse
Flash pulse duration
Transmission mute
Pause time
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
In mode 60/40
In mode 66/33
In DTMF mode
Symbol Min.
t_wl, t_wh
2
t_el, t_eh
2
t_{set up}
0
100
t_e
0
t_RRN
900
T_OL
t_b
t_m
t_IDOL
830
813
[n@100
+ 30]
[n@98.8
+ 22]
t_fl
89.5
98.5
102.5
239.5
263.5
274.0
109.5
120.5
125.0
tm_fl
830
813
846
3116
T_p
3075
3012
Typ. Max. Unit
ms
ms
ms
ms
ms
ms
10
Hz
10.11
Hz
100
ms
98.9
ms
60
ms
66
ms
40
ms
33
ms
833
ms
816.5 ms
(n@100) ms
+ 32
(n@98.9) ms
+ 24.2
92
101
105
242
266
ms
277
112
123
128
832
815.5
848.5
3118
3077
ms
3110
Rev. A1: 16.07.1996
11 (20)