U3761MB Datasheet, PDF (18/23 Pages) TEMIC Semiconductors – Low Voltage Standard Telephone Circuit with 13 Memories

U3761MB
DC Characteristics Dialer
V_DD2 = 2.7 V, f_OSC = 3.58 MHz, all outputs unloaded, S9b
Parameters
Test Conditions / Pins Symbol Min.
Typ.
Max.
Unit
Memory rentention current HKS = 1, V_DD2 = 1.0 V
I_MR
0.2
mA
Pre-emphases
DTMF distortion
Column/Row
R_L = 5 kW
1
2
3
dB
d
– 30
– 23
dB
DP output sink current
Keyboard input drive
current
Keyboard input sink current
Keyboard resistance
F1, F2, F3, E
V_PO = 0.5 V
V_I = 0 V
V_I = 2.7 V
I_PL
0.5
I_KD
30
mA
mA
I_KS
200
400
mA
5
kW
300
W
board resistance
Mask sink / drive current
I_M H/L 0.5
mA
Earth sink / drive current
I_e H/L
0.5
mA
AC Characteristics Dialer
Parameters
Test Conditions / Pins
Symbol Min.
Typ.
Max.
Unit
Keypad active in de-
bounce
t_KID
20
ms
Key release debounce
t_KRD
20
ms
Pre-digit pause
B/M pin = floating 10 ppS
t_PDP
40
ms
B/M pin = low
t_PDP
33.3
ms
Inter-digit pause
( auto dialing )
10 ppS
t_IDP
800
ms
Make/break ratio
B/M pin = floating
M/B
40:60
%
B/M pin = low
33:67
%
DTMF output duration Auto dialing, MODE = V_DD
t_TD
87
ms
MODE = GND
70
Inter-tone pause
Auto dialing, MODE = V_DD
t_ITP
87
ms
MODE = GND
140
Flash break time
F1
C₁ connected to V_DD
t_FB
98
ms
F2
C₂ connected to V_DD
250
ms
F3
C₃ connected to V_DD
600
ms
Flash pause time
F1
F2
F3
t_FP
1
s
Pause time
t_P
3.6
s
On Hook debounce time
t_ohd
150
ms
Earth time
C₄ connected to V_DD
t_et
400
ms
Earth pause time
t_pt
1
s
18 (23)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A2, 23-Apr-97