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L7590C

Features: ` Applies a battery-backed, single-ended, sinusoidal ringing signal to the telephone loop` Ringing capability: - 40 Vrms into 5 North American REN - 30 mApeak into 4 German REN` Built-in current limiting` Low power dissipation in idle and ringing modes` Requires 5 V, a high-value negativ...

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SeekIC No. : 004389435 Detail

L7590C: Features: ` Applies a battery-backed, single-ended, sinusoidal ringing signal to the telephone loop` Ringing capability: - 40 Vrms into 5 North American REN - 30 mApeak into 4 German REN` Built-in c...

L7590C Data Sheet

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Part Number:
L7590C
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Applies a battery-backed, single-ended, sinusoidal ringing signal to the telephone loop
` Ringing capability:
     - 40 Vrms into 5 North American REN
     - 30 mApeak into 4 German REN
` Built-in current limiting
` Low power dissipation in idle and ringing modes
` Requires 5 V, a high-value negative dc supply, and a digital input sequence


Specifications

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of this data sheet. Exposure to absolute maximum ratings for extended periods may adversely affect device reliability.

Parameter Min Typ Max Unit
VDD - 7.0 - V
VNEG - 200 - V
Timing Input Voltage 0.5 - 7.0 V
Storage Temperature Range 40 - 125 °C
Maximum Junction Temperature - 150 - °C
Relative Humidity Range 5 - 95 %



Description

The L7590C Telephone Ringing Driver produces a low-frequency sinusoidal ringing signal for analog telephone loops. L7590Cis accomplished by producing an output pulse stream that is an amplified replica of the digital input. The output is then filtered to produce a sine wave. The peak-to-peak output level is determined by the magnitude of the negative high-voltage dc applied to the device (up to 170 V).

The required input is a 100 kHz CMOS-compatible pulse stream, pulse-width modulated (PWM) at the desired ringing frequency. The output stage consists of one upper and one lower drive transistor with an internal control circuit.

The L7590C IC is optimized for low power dissipation and is available in a 16-pin, surface-mount package.




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