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| U3761MB Datasheet, PDF (19/23 Pages) TEMIC Semiconductors – Low Voltage Standard Telephone Circuit with 13 Memories | |||
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U3761MB
Electrical Characteristics Tone Ringer
fRCK = 4 kHz, VRING = 20 V, Tamb = 25_C, reference point GND, unless otherwise specified
Parameters
Test Conditions / Pins Symbol Min.
Typ.
Max.
Unit
Supply current,
outputs open
VRIAC = 20 V
IRING
2.1
3.8
mA
Switch-on threshold
VRIAC
VRON
23.5
V
Switch-off threshold
VRIAC
VROFF
5.6
V
Ringing frequency
R = 150 kâ¦, C = 1 nF
VRIAC > VRON
f1H
937
1010 1083
Hz
f1L
752
808
868
Audio sequence frequency
f2
11.5
12.5
14.0
Hz
Output voltage swing
VRing = 25 V, Cout = 68 nF
Vout
21
23
Vpp
Turn-off delay
See figure 11
toff
65
ms
Volt
12459
VRING
0
t
VRIAC
0
t
OUT
Melody
t
0
toff
Figure 11. Turn off delay time
Ordering Information
U3761MB-ASD
U3761MB-AFN
U3761MB-AFNG3
Type
SDIP40
SSO44
SSO44 tape and reel
Package
TELEFUNKEN Semiconductors
Rev. A2, 23-Apr-97
Preliminary Information
19 (23)
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