M-959

M-959 Datasheet

M-959

Part	Datasheet
M-959	M-959 (pdf)

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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 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 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 M959 receives pulses from the loop current sense circuit 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 M-959 Absolute Maximum Ratings DC Supply Voltage Any Input Voltage Relative to VDD Any Input Voltage Relative to VSS Operating Temperature Range Storage Temperature Range * Exceeding these ratings may permanently damage the M-959. Absolute Maximum Ratings are stress ratings. Stresses in excess of these ratings can cause permanent damage to the device. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this data sheet is not implied. Exposure of the device to the absolute maximum ratings for an extended period may degrade the device and effect its reliability. Specifications VDD - VSS = through V unless otherwise noted. Parameter Conditions Signal Timing Break Recognition 10 PPS 20 PPS Spurious Break Rejection Make Recognition 10 PPS 20 PPS Interdigit Time IDT 10 PPS 20 PPS Off-hook Delay On-hook Delay LC Hysteresis EOD End of Digit 10 PPS Recognition 20 PPS STROBE Active 10 PPS 20 PPS Data Change Before Logic Input Voltages Logic 0 Requirements

PDF Datasheet Preview

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

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 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 M959 receives pulses from the loop current sense circuit 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

M-959

Absolute Maximum Ratings

DC Supply Voltage

Any Input Voltage Relative to VDD Any Input Voltage Relative to VSS Operating Temperature Range

Storage Temperature Range
* Exceeding these ratings may permanently damage the M-959.

Absolute Maximum Ratings are stress ratings. Stresses in excess of these ratings can cause permanent damage to the device. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this data sheet is not implied. Exposure of the device to the absolute maximum ratings for an extended period may degrade the device and effect its reliability.

Specifications

VDD - VSS = through V unless otherwise noted.

Parameter

Conditions

Signal Timing Break Recognition
10 PPS
20 PPS

Spurious Break

Rejection

Make Recognition
10 PPS
20 PPS

Interdigit Time IDT
10 PPS
20 PPS

Off-hook Delay

On-hook Delay

LC Hysteresis

EOD End of Digit
10 PPS

Recognition
20 PPS

STROBE Active
10 PPS
20 PPS

Data Change Before

Logic Input Voltages

Logic 0

Requirements

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived M-959 Datasheet file may be downloaded here without warranties.

Datasheet ID: M-959 523328