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參數(shù)資料
| 型號： | IDT821621 |
| 廠商： | Integrated Device Technology, Inc. |
| 英文描述： | LONG HAUL SLIC |
| 中文描述： | 長距離用戶接口 |
| 文件頁數(shù)： | 8/21頁 |
| 文件大?。?/td> | 322K |
| 代理商： | IDT821621 |
Pin Description
6
October 8, 2003
IDT821621
PIN DESCRIPTION
LONG HAUL SLIC
Table 1 — Pin Description
Pin Name
Type
PLCC
Pin No.
Description
AGND
Ground
21
Analog ground.
BGND
Ground
1
Battery ground.
VBAT
Battery
8
Battery supply and connection to substrate.
VBREF
23
Battery reference pin. It should be connected to VBAT.
VCC
Power
2
+3.3 V / +5 V compatible power supply.
A (TIP)
I/O
31
Connection to the Tip wire of the subscriber loop.
B (RING)
I/O
32
Connection to the Ring wire of the subscriber loop.
HPA
Capacitor
26
A (TIP) side of high-pass filter capacitor.
HPB
Capacitor
27
B (RING) side of high-pass filter capacitor.
DA
Input
29
Negative input to ring-trip comparator.
DB
Input
30
Positive input to ring-trip comparator.
RSN
Input
22
Receive summing node.
VTX
Output
24
Transmit output.
C1
C2
Inputs
16
15
SLIC state control. TTL compatible. C2 is MSB and C1 is LSB. Refer to
Table 2
for details.
D1
D2
D3
Inputs
10
9
14
Relay driver control. TTL compatible.
D1, D2 and D3 control the relay drivers RYOUT1, RYOUT2 and RYOUT3 respectively. Logic low on D1
activates the RYOUT1 relay driver. Logic low on D2 activates the RYOUT2 relay driver. Logic low on D3
activates the RYOUT3 relay driver.
RYOUT1
Output
4
Relay/switch driver. Open-collector driver with emitter internally connected to BGND.
RYOUT2
Output
5
Relay/switch driver. Open-collector driver with emitter internally connected to BGND.
RYOUT3
Output
6
Relay/switch driver. Open-collector driver with emitter internally connected to BGND.
RINGOUT
Output
3
Ringing relay driver. Open-collector driver with emitter internally connected to BGND.
DET
Output
13
Detector output. Open-collector with a built-in 15 k
pull-up resistor.
This output provides on-hook/off-hook status of the loop based on the selected operating state. Refer to
Table 2
for details. The detected output will either be hook switch or ring-trip. Logic low indicates that a hook
switch event or ring-trip event has been detected.
RD
28
Detect resistor. An external resistor connected to this pin is used to set the loop-detect threshold.
RDC
20
DC feed resistor. The DC feed current is programmed by a network connected between this pin and RSN.
CAS
Capacitor
17
Anti-saturation capacitor. An external capacitor is connected to this pin to filter battery voltage when
operating in anti-saturation region.
TMG
Thermal management. An external resistor is connected between this pin and VBAT to offload power from
SLIC.
NC
11, 12, 18, 19, 25
No Connect.
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