參數(shù)資料
型號(hào)： W671361P
廠商： WINBOND ELECTRONICS CORP
元件分類： 模擬傳輸電路
英文描述： TELECOM-SLIC, PQCC28
封裝： PLASTIC, LCC-28
文件頁(yè)數(shù)： 15/48頁(yè)
文件大?。?/td> 1344K
代理商： W671361P
W671300 SERIES
7.2. OPERATING MODES
The operation of the W671300 Family may best be understood by examining the various operating
modes. The following table gives an overview of those modes and the members of the W671300
family to which they apply. A detailed description of each mode will follow.
TABLE 1: DEVICE OPERATING MODES
MODE
F2 F1 F0 E0 = 1 E0 = 0 W671310 W671320 W671330 W671340 W671352 W671361 W671370
W671371
Low Power Standby
0
SHD
GKD
●
Forward Active
0
1
SHD
GKD
●
Unbalanced Ringing
0
1
0
RTD
●
Reverse Active
0
1
SHD
GKD
●
Ringing
1
0
RTD
●
Forward Loop Back
1
0
1
SHD
GKD
●
Tip Open
1
0
SHD
GKD
●
Power Denial
1
n/a
●
Notes:
SHD: Switch Hook Detector; GKD: Ground Key Detector;
RTD: Ring Trip Detect
7.2.1. LOW POWER STANDBY MODE
The Low Power Standby mode (LPS, 000) should be used during idle line conditions. The device is
designed to operate from the high battery during this mode. Most of the internal circuitry is powered
down, resulting in low power dissipation. If the 2-wire (tip/ring) DC voltage requirements are not critical
during idle line conditions, the device may also be operated from the low battery. Operation from the
low battery will further decrease the standby power dissipation.
TABLE 2: DEVICE INTERFACES DURING LOW POWER STANDBY
INTERFACE
ON
OFF
NOTES
Receive
X
Ringing
X
Transmit
X
AC transmission, impedance matching and ringing are disabled during
this mode.
2-Wire
X
Amplifiers disabled
Loop Detect
X
Switch hook or ground key
7.2.1.1. 2-Wire Interface
During Low Power Standby, the tip and ring amplifiers are turned off to conserve power and the 2-wire
interface is maintained with internal switches and voltage references. The device will provide
Maintenance Termination Unit (MTU) compliance, loop current and loop supervision. Figure 3
represents the internal circuitry providing the 2-wire interface during Low Power Standby.
- 22 -
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