Datasheet > HM9270C

HM9270C

更新时间： 2024-02-11 15:55:07

品牌	Logo	应用领域
义隆 - ELAN		/
页数	文件大小	规格书
10页	68K
描述
DTMF RECEIVER

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数据手册

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HM9270C 数据手册

HM 9270C/D

DTMF RECEIVER

General Description

The HM 9270C/D is a complete DTMF receiver integrating both the bandsplit filter and digital decoder

functions. The filter section uses switched capacitor techniques for high- and low-group filters and dial-tone

rejection. Digital counting techniques are employed in the decoder to detect and decode all 16 DTMF tone-

pairs into a 4-bit code. External component count is minimized by on-chip provision of a differential input

amplifier, clock-oscillator and latched 3-state bus interface.

Features

• Complete receiver in an 18-pin package.

• Excellent performance.

• CMOS, single 5 volt operation.

• Minimum board area.

• Central office quality.

• Low power consumption.

• Power-Down mode (HM9270D only).

• Inhibit-mode (HM9270D only).

Pin Configurations

HM9270C

HM9270D

IN+

REF

IC*

IN+

REF

INH

St/GT

ESt

StD

ESt

StD

PWDN

OSC1

OSC2

IC*

OSC1

OSC2

TOE

* Connect to V_SS

- 1 -

12 3 4 5 6 7...10

中文翻译

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