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 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 www.clare.com 1 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. Absolute Maximum Ratings DC Supply Voltage Any Input Voltage Relative to VDD Any Input Voltage Relative to VSS Operating Temperature Range Storage Temperature Range 6.0 V +0.3 V -0.3 V -40˚C to +85˚C -55˚C to + 125˚C * Exceeding these ratings may permanently damage the M-959. Specifications VDD - VSS = 2.5 through 6.0 V unless otherwise noted. Parameter Signal Timing Break Recognition Spurious Break Rejection Make Recognition Interdigit Time (IDT) Off-hook Delay On-hook Delay LC Hysteresis EOD (End of Digit) Recognition STROBE Active Data Change Before Logic Input Input Voltages Requirements Input Current Pull Up/Down Resistance Logic Output Output Voltages Characteristics Output Currents Power Requirement Tri-State Leakage Supply Current Conditions 10 PPS 20 PPS – Min 45 30 0 Typ – – – Max 85 40 10 Units ms ms ms 10 PPS 20 PPS 10 PPS 20 PPS – – – 10 PPS 20 PPS 10 PPS 20 PPS – Logic 0 Logic 1 30 15 285 142.5 95 285 1 95 47.5 190 95 1.0 0.0 3.5 – – 0.0 4.5 -2.1 -0.44 0.44 – – – – 300 150 100 300 1.5 100 50 200 100 1.5 2.25 2.75 – – 65 24 315 157.5 105 315 2 105 52.5 210 105 2.0 1.5 5.0 ± 30 2.0 0.5 5.0 – – – ± 1.0 2.0 ms ms ms ms ms ms ms ms ms ms ms ms V V µA mA V V mA mA mA µA mA – Logic 0 Logic 1 Vout = 2.5V Vout = 4.6V Vout = 0.4V – – -4.2 -0.88 0.88 – – Notes 1, 2 1,3 1, 4 1, 3 1 1 1 Notes: 1. VDD - VSS = 5.0V 2. Maximimum is 30% of VDD - VSS 3. Minimum is 70% of VDD - VSS 4. No load. 5. Typical column for reference only. 2 www.clare.com Rev. 3 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 1 0 0 0 1 2 0 0 1 0 3 0 0 1 1 4 0 1 0 0 5 0 1 0 1 6 0 1 1 0 7 0 1 1 1 8 1 0 0 0 9 1 0 0 1 0 1 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 M-959 Mechanical Dimensions Tolerances Inches Min A A1 b b2 C D E E1 e ec L Max .210 .015 .014 .022 .045 .070 .008 .014 .735 .775 .300 .325 .240 .280 100 BSC 0˚ 15˚ .115 .150 Metric (mm) Min Max 5.33 .38 .36 .56 1.14 1.78 .20 .36 18.67 19.70 7.62 8.26 6.10 7.1 2.54 BSC 0˚ 15˚ 2.92 3.81 Dimensions mm (inches) 4 www.clare.com Rev. 3 Worldwide Sales Offices CLARE LOCATIONS EUROPE ASIA/PACIFIC Clare Headquarters 78 Cherry Hill Drive Beverly, MA 01915 Tel: 1-978-524-6700 Fax: 1-978-524-4900 Toll Free: 1-800-27-CLARE European Headquarters CP Clare nv Bampslaan 17 B-3500 Hasselt (Belgium) Tel: 32-11-300868 Fax: 32-11-300890 Clare Switch Division 4315 N. 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Colombo 10/A I-20066 Melzo (Milano) Tel: 39-02-95737160 Fax: 39-02-95738829 http://www.clare.com Sweden Clare Sales Comptronic AB Box 167 S-16329 Spånga Tel: 46-862-10370 Fax: 46-862-10371 United Kingdom Clare UK Sales Marco Polo House Cook Way Bindon Road Taunton UK-Somerset TA2 6BG Tel: 44-1-823 352541 Fax: 44-1-823 352797 Clare, Inc. makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make changes to specifications and product descriptions at any time without notice. Neither circuit patent licenses nor indemnity are expressed or implied. Except as set forth in Clare’s Standard Terms and Conditions of Sale, Clare, Inc. assumes no liability whatsoever, and disclaims any express or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right. The products described in this document are not designed, intended, authorized or warranted for use as components in systems intended for surgical implant into the body, or in other applications intended to support or sustain life, or where malfunction of Clare’s product may result in direct physical harm, injury, or death to a person or severe property or environmental damage. Clare, Inc. reserves the right to discontinue or make changes to its products at any time without notice. Specification: DS-M959-R3 ©Copyright 2001, Clare, Inc. All rights reserved. Printed in USA. 7/20/01