6
LOOP CURRENT DETECTOR
On-Hook to Off-Hook
RD = 39k, -40
oC to 85oC
372/RD
465/RD
558/RD
mA
Off-Hook to On-Hook
RD = 39k, -40
oC to 85oC
325/RD
405/RD
485/RD
mA
Loop Current Hysteresis
RD = 39k, -40
oC to 85oC
25/RD
60/RD
95/RD
mA
GROUND KEY DETECTOR
Tip/Ring Current Difference - Trigger
(Note 29, Figure 11)
8
12
17
mA
Tip/Ring Current Difference - Reset
(Note 29, Figure 11)
3
7
12
mA
Hysteresis
(Note 29, Figure 11)
0
5
9
mA
FIGURE 10. IDLE CHANNEL NOISE
FIGURE 11. GROUND KEY DETECT
RING TRIP DETECTOR (DT, DR)
Offset Voltage
Source Res = 0
-20
-
20
mV
Input Bias Current
Source Res = 0
-500
-
500
nA
Input Common-Mode Range
Source Res = 0
VBAT +1
-
0
V
Input Resistance
Source Res = 0, Balanced
3
-
M
RING RELAY DRIVER
VSAT at 25mA
IOL = 25mA
-
1.0
1.5
V
Off-State Leakage Current
VOH = 12V
-
10
A
DIGITAL INPUTS (E0, E1, C1, C2)
Input Low Voltage, VIL
0
-
0.8
V
Input High Voltage, VIH
2
-
VCC
V
Input Low Current, IIL: C1, C2
VIL = 0.4V
-200
-
A
Input Low Current, IIL: E0, E1
VIL = 0.4V
-100
-
A
Input High Current
VIH = 2.4V
-
40
A
DETECTOR OUTPUT (DET)
Output Low Voltage, VOL
IOL = 2mA
-
0.45
V
Output High Voltage, VOH
IOH = 100A
2.7
-
V
Internal Pull-Up Resistor
10
15
20
k
POWER DISSIPATION
Open Circuit State
C1 = C2 = 0
-
23
mW
On-Hook, Standby
C1 = C2 = 1
-
30
mW
On-Hook, Active
C1 = 0, C2 = 1, RL = High Impedance
-
150
mW
Electrical Specifications
TA = -40
oC to 85oC, V
CC = 5V ±5%, VEE = -5V ±5%, VBAT = -28V, AGND = BGND = 0V, RDC1 = RDC2 =
41.2k
, RD = 39k, RSG = ∞, RF1 = RF2 = 0, CHP = 10nF, CDC = 1.5F, ZL = 600. (Continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RT
RRX
600k
300k
600
VTR
VTX
RL
TIP
5
VTX
21
RING
6
RSN
19
TIP
5
RSN
19
RING
6
RDC
17
RDC2
41.2k
RDC1
41.2k
CDC
1.5
F
DET
E1 = C1 = 0, C2 = 1
HC5513