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L7554

Features: Low active power (typical 165 mW during on-hook transmission) Sleep state for low idle power (76 mW) Quiet Tip/Ring polarity reversal Supports meter pulse injection Spare op amp for meter pulse filtering 24 V to 72 V power supply operation Distortion-free on-hook transmission Conv...

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SeekIC No. : 004389425 Detail

L7554: Features: Low active power (typical 165 mW during on-hook transmission) Sleep state for low idle power (76 mW) Quiet Tip/Ring polarity reversal Supports meter pulse injection Spare op amp for meter...

L7554 Data Sheet

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Part Number:
L7554
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/4/27

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Product Details

Description



Features:

Low active power (typical 165 mW during on-hook transmission)
Sleep state for low idle power (76 mW)
Quiet Tip/Ring polarity reversal
Supports meter pulse injection
Spare op amp for meter pulse filtering
24 V to 72 V power supply operation
Distortion-free on-hook transmission
Convenient operating states:
- Forward powerup
- Polarity reversal powerup
- Forward low-power scan
- Polarity reversal low-power scan
- Ground start
- Disconnect (high impedance)
Adjustable supervision functions:
- Off-hook detector with longitudinal rejection
- Ground key detector
- Ring trip detector
Independent, adjustable, dc and ac parameters:
- dc feed resistance
- Loop current limit
- Termination impedance
 Thermal protection


Pinout

Connection Diagram


Specifications

Parameter
Symbol
Value
Unit
5 V Power Supply
VCC
7.0
V
Battery (Talking) Supply
VBAT
75
V
Logic Input Voltage
-
0.5 to +7.0
V
Analog Input Voltage
-
7.0 to +7.0
V
Maximum Junction Temperature
TJ
165
°C
Storage Temperature Range
Tstg
40 to +125
°C
Relative Humidity Range
RH
5 to 95
%
Ground Potential Difference (BGND to AGND)
-
±3
V
PT or PR Fault Voltage (dc)
VPT, VPR
(VBAT 5) to +3
V
PT or PR Fault Voltage (10 x 1000 µs)
VPT, VPR
(VBAT 15) to +15
V
Current into Ring Trip Inputs
IRTSP, IRTSN
±240
µA



Description

This electronic subscriber loop interface circuit (SLIC) is optimized for low-power consumption while providing an extensive set of features.

Quiet polarity reversal is possible because the ac path is uninterrupted during transition.

The L7554 includes the ground start state and a summing node for meter pulse injection to 2.2 Vrms. A spare, uncommitted op amp is included for meter pulse filtering.

The L7554 is being offered in two versions, based upon maximum battery. The L7554AP is guaranteed to 60 V, and the L7554BP is guaranteed to 72 V.

The L7554 is available in a 44-pin PLCC package. L7554 is built by using a 90 V complementary bipolar (CBIC) process.




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