參數(shù)資料
型號: MC33121
廠商: Motorola, Inc.
英文描述: LOW VOLTAGE SUBSCRIBER LOOP INTERFACE CIRCUIT
中文描述: 低電壓用戶環(huán)路接口電路
文件頁數(shù): 4/32頁
文件大小: 570K
代理商: MC33121
MC33121
4
MOTOROLA
ELECTRICAL CHARACTERISTICS
(VEE = – 24 V, VDD = + 5.0 V, unless otherwise noted. VCC = VAG = VDG = 0 V, TA = 25
°
C, see Figure 1.)
Characteristic
Symbol
Min
Typ
Max
Unit
LOGIC INTERFACE
ST1 Output Voltage
Low (IST1 = 1.0 mA, VDD = 5.5 V)
High (IST1 = – 100
μ
A, VDD = 4.5 V)
VOL
VOH
VDG
2.4
0.17
3.2
0.4
Vdc
ST2 Output Voltage
Low (IST2 = 1.0 mA, VDD = 5.5 V)
High (IST2 = – 100
μ
A, VDD = 4.5 V)
VOL
VOH
VDG
2.4
0.17
4.3
0.4
Time Delay
Hookswitch Closure to ST1 Change
Hookswitch Opening to ST1 Change
tST11
tST12
10
200
μ
s
Hookswitch Closure to 90% of Loop Current (CT = 0.1
μ
F)
PDI Taken High–to–Low to 10% of Loop Current
PDI Taken Low–to–High to 90% of Loop Current
tHS
tST21
tST22
19
ms
18
10
ms
μ
s
PDI Input Current
VPDI = 3.0 V, RL = 367
, VDD = 5.0 V
VPDI = 0 V, RL = 367
, VDD = 5.5 V
IIH
– 1250
– 800
– 800
– 300
μ
A
PDI Input Voltage
Low
High
VIL
VIH
VDG
2.0
0.8
VDD
Vdc
MISCELLANEOUS
VQB Voltage (VQB – VEE)
@ IL = 20 mA
@ IL = 40 mA
TXO Offset Voltage (VTXO – VAG) @ RL = 600
TXO Output Current
VQB
0.82
0.95
Vdc
VTXO
ITXO
VRXOS
IVAG
– 400
+ 30
+ 400
mVdc
±
275
±
800
μ
A pk
RXI Offset Voltage (VRXI – VAG) @ RL = 600
VAG Input Current @ RL = 600
Idle Channel Noise (with C–message filter, RL = 600
)
@ TXO (Pin 11)
@ Tip/Ring
0.8
mVdc
0.2
μ
A
NIC4
NIC2
– 10
– 5.0
dBrnc
Thermal Resistance — Junction to Ambient
(Either package, in still air, soldered to a PC board)
(@ TA = + 25
°
C)
(@ TA = + 85
°
C)
θ
JA
62
36
°
C/W
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