Zakładka z wyszukiwarką danych komponentów |
|
CD22859E Arkusz danych(PDF) 1 Page - Intersil Corporation |
|
CD22859E Arkusz danych(HTML) 1 Page - Intersil Corporation |
1 / 5 page Semiconductor 4-126 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-800-4-HARRIS or 407-727-9207 | Copyright © Harris Corporation 1999 CD22859 Monolithic Silicon COS/MOS Dual-Tone Multifrequency Tone Generator The CD22859 is a CMOS dual-tone multifrequency (DTMF) tone generator for use in dual-tone telephone dialing systems. The device can easily be interfaced to a standard push-button telephone keyboard to provide enabling operation directly with the telephone lines. The CD22859 generates standard DTMF sinusoidal dialing tones from an on-chip reference crystal oscillator. The reference oscillator uses an inexpensive 3.579545MHz color TV crystal to create highly stable and accurate tones. The sinusoidal tones are digitally synthesized by a stair-step approximation. One of four low-frequency band row tones and one of four high-frequency band column tones are selected by driving one of the four row inputs and one of the four column inputs low. Simultaneous selection of more than one row input and/or more than one column input will inhibit tone generation, or generate a single-tone sinusoid. These operating modes are described in the functional truth table. Control logic is included to allow easy interface to standard K500-type telephones. Two CMOS outputs (TX,RX) capable of driving external pnp receiver and transmitter muting transistors are provided. A low input to the CD pin inhibits tone generation, turns off the reference oscillator and causes TX and RX outputs to go to logic ‘0’. During tone generation mode, CD = 1 and TX, RX = logic 1. The row, column and CD inputs are provided with pull-up resistors to allow the use of SPST switch matrixes. Features • Mute Drivers On-Chip • Device Power can Either be Regulated DC or Telephone Loop Current • Use of an Inexpensive 3.579545MHz TV Crystal Provides High Accuracy and Stability for all Frequencies Applications • For Use In Dual-tone Telephone Dialing Systems Pinout CD22859 (PDIP) TOP VIEW Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CD22859E -40 to 85 16 Ld PDIP E16.3 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 VDD TX C1 C2 C3 VSS OSC2 OSC1 VOUT R1 R2 R3 R4 RX C4 CD Data Sheet February 1999 File Number 1257.4 [ /Title (CD22 859) /Sub- ject (Monol ithic Sili- con COS/ MOS Dual- Tone Multi- fre- quency Tone Gener- ator) /Autho r () /Key- words (Har- ris Semi- con- ductor, Tele- com, SLICs, SLACs , Tele- phone, Tele- phony, WLL, Wire- less OBSOLETE PRODUCT NO RECOMMENDED REPLA CEMENT Call Central Applications 1-800-442-7747 or email: centapp@harris.com |
Podobny numer części - CD22859E |
|
Podobny opis - CD22859E |
|
|
Link URL |
Polityka prywatności |
ALLDATASHEET.PL |
Czy Alldatasheet okazała się pomocna? [ DONATE ] |
O Alldatasheet | Reklama | Kontakt | Polityka prywatności | Linki | Lista producentów 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 |