Electronic Components Datasheet Search |
|
TCM1520ADR Datasheet(PDF) 1 Page - Texas Instruments |
|
TCM1520ADR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 7 page TCM1520A RING DETECTOR SCTS005B − OCTOBER 1984 − REVISED DECEMBER 1990 Copyright 1990, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 • On-Chip 150-V Bridge Diode Configuration • Reliable BIDFET† Technology • High Standby Impedance ...1 MΩ Typ • Efficient High-Voltage Operation • Output Compatible With TTL, NMOS, and CMOS • Built-In 5-V Series Regulator • Built-In Lightning and Transient Protection description The TCM1520A is a monolithic ring-detection integrated circuit designed for use in isolated or nonisolated telephone applications. The device uses a modified form of the Texas Instruments BIDFET† technology to combine low-voltage CMOS and high-voltage bipolar input/output circuitry. It features efficient high-voltage (40 V to 150 V) operation with a typical current drain of 1 mA. During standby, the input impedance is approximately 1 M Ω or greater, which prevents any interference with parallel off-hook telephones transmitting DTMF or voice frequencies. The device achieves this high input impedance with an on-chip series zener diode that does not conduct until the voltage across AC INPUT (pins 1 and 8) exceeds 8 V. When the voltage across pins 1 and 8 exceeds 18 V, the internal switch is closed, which bypasses the 6.8-V zener diode series resistor. This allows more efficient power transfer to the load when the device is in the operating mode. In the operating mode, the impedance of the device varies from 30 k Ω to 7 kΩ over the ring signal of 40 V at 16 Hz to 150 V at 68 Hz and is reasonably independent of the output load. In typical telephone applications, the TCM1520A is activated through the telephone line by a ring voltage of 40 V at 16 Hz to 150 V at 68 Hz. The TCM1520A generates a signal suitable to drive an optocoupler or TTL, NMOS, or CMOS logic. The 5-V OUTPUT can be used as a supply source for optocouplers or low-power logic. This output is noninverting and is at a high level during ringing. The TCM1520A incorporates lightning and transient protection that is designed to withstand lightning strikes of 1.5-kV amplitude and 200- µs duration and also features built-in circuitry to avoid tapping or false triggering due to transients. Caution. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. † BIDFET − Bipolar, double-diffused, N-channel and P-channel MOS transistors on same chip. This is a patented process. 1 2 3 4 8 7 6 5 AC INPUT INVERTING OUTPUT COMMON 5-V OUTPUT AC INPUT COMMON C FILTER BELL TAPPING SENSE D OR P PACKAGE (TOP VIEW) TCM1520A APPLICATION Phone Line AC Ring Signal TCM1520A Electronic Telephone or Accessory TTL /NMOS/CMOS Microprocessor AVAILABLE OPTIONS PACKAGE SMALL OUTLINE (D)‡ PLASTIC DIP (P) TCM1520AD TCM1520AP −40 °C to 85°C TA ‡ The D package is available taped and reeled with suffix R added to the device type (i.e., TCM1520ADR). PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Similar Part No. - TCM1520ADR |
|
Similar Description - TCM1520ADR |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |