- 您現在的位置：買賣IC網 > PDF目錄367440 > L7590C CAP CER 10PF 100V C0G 0603 PDF資料下載
參數資料
| 型號： | L7590C |
| 英文描述： | CAP CER 10PF 100V C0G 0603 |
| 中文描述： | 電話振鈴驅動 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 269K |
| 代理商： | L7590C |
Data Sheet
June 1998
L7590C Telephone Ringing Driver
Features
I
Applies a battery-backed, single-ended, sinusoidal
ringing signal to the telephone loop
I
Ringing capability:
— 40 Vrms into 5 North American REN
— 30 mApeak into 4 German REN
I
Built-in current limiting
I
Low power dissipation in idle and ringing modes
I
Requires 5 V, a high-value negative dc supply, and
a digital input sequence
Description
The L7590C Telephone Ringing Driver produces a
low-frequency sinusoidal ringing signal for analog
telephone loops. This is 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 deter-
mined 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.
12-3057a (f)
Figure 1. Block Diagram
CLOCK
CONTROL
LEVEL
SHIFT
AND
OUTPUT
TIMING
CURRENT
LIMIT
BIAS
CIRCUIT
OUT
GNDD
V
DD
CLK
V
REF
V
NEG
GNDR
CB1
CB2
EN
30
L1
L2
V
NEG
相關PDF資料 |
PDF描述 |
|---|---|
| L7591 | Subscriber Line Interface Circuit Protector |
| L77-100 | Logic IC |
| L77-101 | Logic IC |
| L77-102 | Logic IC |
| L77-103 | Logic IC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| L7590CAE | 制造商:Alcatel-Lucent 功能描述:7590CAE |
| L7591 | 制造商:AGERE 制造商全稱:AGERE 功能描述:Subscriber Line Interface Circuit Protector |
| L75F50R | 制造商:Ohmite Mfg Co 功能描述: |
| L75J1K0E | 制造商:Ohmite Mfg Co 功能描述: |
| L75J1K5 | 制造商:Ohmite Mfg Co 功能描述: |
發布緊急采購，3分鐘左右您將得到回復。