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M-959 の電気的特性と機能

M-959のメーカーはClare Inc.です、この部品の機能は「Dial Pulse Counter and Hook Status Monitor」です。


製品の詳細 ( Datasheet PDF )

部品番号 M-959
部品説明 Dial Pulse Counter and Hook Status Monitor
メーカ Clare Inc.
ロゴ Clare  Inc. ロゴ 




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M-959 Datasheet, M-959 PDF,ピン配置, 機能
M-959
Dial Pulse Counter and Hook Status Monitor
Features
Time-guarded dial pulse counting
10 or 20 PPS dialing speeds pin selectable
Tri-state data outputs
Valid data output strobe
Data strobe control for use in interrupt-driven
environments
Independent hook status monitoring
Low-power CMOS construction
Pin Diagram
Description
The M-959 is a low-power dial pulse counter and
hook status monitor. Contained in a 14-pin package,
the M-959 requires no external components except a
single 3.579 MHz television color burst crystal.
The M-959 is typically connected to a loop current
sensing circuit, which is connected in series with the
voice pair (Tip and Ring) of a telephone line. The M-
959 receives pulses from the loop current sense cir-
cuit and translates them into logic level outputs
indicating hook status and decoded dialed digits.
Logic inputs to the M-959 select dialed digit speeds
and control Data and Strobe outputs supporting bus
interrupt driven implementations.
Ordering Information
Part #
M-959
Description
14-pin plastic DIP
Block Diagram
DS-M959-R3
www.clare.com
1

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M-959 pdf, ピン配列
M-959
Pin Functions
Pin
LC
OH
10/20
D3-D0
OE
XIN
XOUT
Clear
Strobe
Function
Loop Current Input. Signal from phone line to be monitored for dial pulse signaling and hook status. Active low,
internally pulled high.
Off-hook Output. Hook status of phone line. Active (off-hook) high.
Pulse Speed Input. Low for 10 pulse per second, high for 20 pulse per second. Internally pulled low.
Data Outputs. Binary decoded rotary dialed digit. Active during valid digit time (strobe high), low at any other time.
Digit Dialed D3 D2 D1 D0
10 0 0 1
20 0 1 0
30 0 1 1
40 1 0 0
50 1 0 1
60 1 1 0
70 1 1 1
81 0 0 0
91 0 0 1
01 0 1 0
Output Enable Input. Active high, a log low tri-states D3 through D0 outputs. Internally pulled high.
Crystal Oscillator Input
Crystal Oscillator Output.
Strobe Control Input. Momentary high during digit valid time resets STROBE latch output low until next valid
digit is received. Internally pulled low.
Digit Valid Output. Indicates valid digit data present on D3 through D0. Active high.
Timing Diagram
Rev. 3 www.clare.com
3


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共有リンク

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部品番号部品説明メーカ
M-959

Dial Pulse Counter and Hook Status Monitor

Clare  Inc.
Clare Inc.


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