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TCM1520A Datasheet(PDF) 3 Page - Texas Instruments

Part # TCM1520A
Description  RING DETECTOR
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

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TCM1520A
RING DETECTOR
SCTS005B − OCTOBER 1984 − REVISED DECEMBER 1990
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
recommended operating conditions
MIN
MAX
UNIT
Input voltage, VIrms (f = 15.3 Hz to 68 Hz) (see Note 2)
40
150
V
Operating free-air temperature, TA
−40
85
°C
NOTE 2: Input voltage is applied to AC INPUT (pins 1 and 8) through a series 2.2-k
Ω ±10% resistor and a 0.47-µF ±10% capacitor. (see
Figures 1, 4, and 5.)
electrical characteristics over recommended operating free-air temperature range, RL = open,
C(fltr) = 10 µF (unless otherwise noted)
detector section
PARAMETER
TEST CONDITIONS†
MIN
TYP‡
MAX
UNIT
V(BR) CEX
Collector-emitter output breakdown voltage,
INVERTING OUTPUT
VID ≤ 5 Vrms,
IO = 5 µA
45
V
VOL
Low-level output voltage, INVERTING OUTPUT
VID = 25 Vrms,
IO = 1.6 mA
1
V
VIT +
Positive-going input threshold voltage
18
25
V
VIT −
Negative-going input threshold voltage
6
7
V
Vhys
Hysteresis (VIT + − VIT −)
11
V
Shunt voltage, C FILTER
IID = 10 mA
38
50
V
VI(on)
On-state input current, SCR
See Note 3
50
100
V
VO
Output voltage, 5-V OUTPUT
VID = 40 V,
RL = 10 kΩ
4.25
5.75
V
ZI(off)
Standby input impedance
VIrms = 3 V,
f
≤ 20 kHz
1
M
Impedance when ringing
VIrms = 40 V,
f = 16 Hz
30
k
Impedance when ringing
VIrms = 130 V,
f = 20 Hz
20
k
II(on)
On-state input current, SCR (see Note 4)
See Note 3
55
110
mA
II(hold)
Input holding current, SCR
See Note 3
100
µA
Operating current
VID = 40 V,
Output open
1
1.6
mA
† All characteristics are measured with a 2.2-kΩ resistor and a 0.47-µF capacitor connected at AC INPUT (pin 1) in series with the input signal,
unless otherwise noted.
‡ All typical values are at TA = 25°C.
NOTES:
3. These parameters are measured using pulse techniques (tw ≤ 200 µs, duty cycle ≤ 5%) with C FILTER grounded.
4. This is the input current required to turn on the SCR.
switching characteristics at 25
°C operating free-air temperature, f = 20 Hz (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ton
Turn-on time
VIrms = 40 V
100
ms
t(off)
Turn-off time
VIrms = 40 V
175
ms
t(off)
Turn-off time
VIrms = 60 V to 150 V
300
ms


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