U3761MB Datasheet, PDF (17/23 Pages) TEMIC Semiconductors – Low Voltage Standard Telephone Circuit with 13 Memories

U3761MB
Electrical Characteristics Speech Circuit
Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mV_rms, R_DC = 39 Ω / 1 W, T_amb = 25°C, unless otherwise specified
Parameters
Test Conditions / Pin
Symbol Min.
Line voltage
Transmit and sidetone
I_L = 5 mA
I_L = 20 mA
I_L = 30 mA
I_L = 73 mA
V_L
1.2
Input resistance
R_i
R_i
45
Gain
I_L = 20 mA, S5 = open
G_s
46.8
Gain change with current I_L = 20 to 60 mA
DG_S
–0.5
Gain deviation
R_AGC = infinite
T_amb = –10 to +60°C
DG_S
–0.5
I_L = 20 mA
Line-loss compensation
R_AGC = 12 kW, I_L = 73 mA DG_s
– 4.8
Noise at line weighted
I_L > 20 mA, G_S = 48dB
n_o
psophometrically
Sidetone reduction
yI_L 20 mA
G_STA
10
DTMF amplifier
Volume range d < 5%
w Single tone, I_L 20 mA
V_L
1.3
DTMF output level low
frequency group
I_L = 20 mA, S5 = closed
V_L
–8
Pre-emphasis between high P_PRE = P_HLG – P_LLG,
and low level frequency S5 = closed
group
P_PRE
1
Receiving amplifier
Gain
Gain change with current
Gain deviation
Line-loss compensation
w IL 20 mA
I_L = 20 to 60 mA
R_AGC = infinite
T_amb = –10 to +60°C
I_L = 20 mA
I_L = 73 mA
G_R
3
DG_R
–0.5
DG_R
–0.3
DG_R
– 4.7
Receiving noise at
I_L = 73 mA
n_i
earphone weighted
psophometrially
Gain change when muted
Output voltage push-pull
y I_L 20 mA
y I_L
100
W^{20inmseAri,eZsear}
=
68
nF,
G_RM
V_RECO
24
0.8
Ear protection differential
I_L =
Z_ear
40 mA,
= 68 nF
V+ _g1e0n0=W4
V_rms,
V_ear
1.3
y ^{Supply voltage (for internal use only)}
Output voltage
I_L 20 mA dialing mode
V_DD
2.3
Distortion at line
VL = 0.775 Vrms
IL = 20 mA, S5 = open
d_t
Maximum output voltage
swing at line
IL = 20 mA,
Vmic = 50 mVoff
V_{L max}
Mute suppression transmit IL = 20 mA
with privacy function
G_SPRIV
60
Typ.
4.0
4.5
6.4
80
47.8
–6
15
–6
– 77.5
29
0.9
1.6
3.4
Max.
1.5
120
48.8
0.5
0.5
–7
– 72
20
–4
3
5
0.5
0.7
–7
– 71
34
2.5
6.3
2
4
Unit
V
V
V
V
kΩ
dB
dB
dB
dB
dBmp
dB
dBm
dBm
dB
dB
dB
dB
dB
dBm
dB
V_RMS
V_rms
V
%
Vpp
dB
TELEFUNKEN Semiconductors
Rev. A2, 23-Apr-97
Preliminary Information
17 (23)