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CD22354A 数据表(PDF) 1 Page - Harris Corporation |
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CD22354A 数据表(HTML) 1 Page - Harris Corporation |
1 / 10 page 4-165 Semiconductor February 1999 Pinout CD22354A, CD22357A (PDIP) TOP VIEW Functional Block Diagram FULL-FEATURE PCM CODEC 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 BCLKX MCLKX DX FSX GSX VFX1+ VFX1- TSX V- GND VFRO V+ FSR DR BCLKR/ CLKSEL MCLKR/ PDN RCV VREF XMIT VREF COMPARATOR XMIT CLOCK CIRCUIT BAND GAP REFERENCE XMIT DIGITAL RCV DIGITAL 3 VFRO +5V -5V V+ V- 11 10 12 13 9 8 5 7 6 4 DX FSX FSR DR PARALLEL TO SERIAL S.A.R. SIGN BIT INT. TRANSMIT D/A LADDER RECEIVE FILTER FILTER RECEIVE D/A LADDER FILTER XMIT LOW PASS FILTER XMIT HIGH PASS FILTER 14 + 15 2 BCLKR/ CLKSEL MCLKR/ PDN MCLKX SERIAL TO PARALLEL D/A REGISTER BCLKX TSX 16 1 SMOOTHING GND VFX1+ VFX1- GSX ANTI-ALLAS LOW PASS RCV CLOCK CIRCUIT CD22354A, CD22357A CMOS Single-Chip, Full-Feature PCM CODEC File Number 1682.4 CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © Harris Corporation 1999 Description The CD22354A and CD22357A are monolithic silicon- gate, double-poly CMOS integrated circuits containing the band-limiting filters and the companding A/D and D/A conversion circuits that conform to the AT&T D3/D4 specifications and CCITT recommendations. The CD22354A provides the AT&T µ-law and the CD22357A provides the CCITT A-law companding characteristic. The primary applications for the CD22354A and CD22357A are in telephone systems. These circuits perform the analog and digital conversions between the subscriber loop and the PCM highway in a digital switching system. The functional block diagram is shown below. With flexible features, including synchronous and asynchronous operations and variable data rates, the CD22354A and CD22357A are ideally suited for PABX, central office switching system, digital telephones as well as other applications that require accurate A/D and D/A conversions and minimal conversion time. Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CD22354AE -40 to 80 16 Ld PDIP E16.3 CD22357AE -40 to 80 16 Ld PDIP E16.3 Features • Meets or Exceeds All AT&T D3/D4 Specifications and CCITT Recommendations • Complete CODEC and Filtering Systems: No External Components for Sample-and-Hold and Auto-Zero Functions. Receive Output Fil- ter with (SIN X)/X Correction and Additional 8kHz Suppression • Variable Data Clocks - From 64kHz . . . . . . . . . . . . . . . . . . . . . 2.1MHz • Receiver Includes Power-Up Click Filter • TTL or CMOS-Compatible Logic • ESD Protection on All Inputs and Outputs Applications • PABX • Central Office Switching Systems • Accurate A/D and D/A Conversions • Digital Telephones • Cellular Telephone Switching Systems • Voice Scramblers - Descramblers • T1 Conference Bridges • Voice Storage and Retrieval Systems • Sound Based Security Systems • Computerized Voice Analysis • Mobile Radio Telephone Systems • Microwave Telephone Networks • Fiber-Optic Telephone Networks [ /Title (CD22 354A, CD223 57A) /Sub- ject (CMO S Sin- gle- Chip, Full- Fea- ture PCM CODE C) / Author () /Key- words (Har- ris Semi- con- ductor, RSLIC 18, Tele- com, SLICs, SLACs , Tele- phone, Tele- phony, WLL, Wire- less Local Loop, OBSOLETE PRODUCT NO RECOMMENDED REPLA CEMENT Call Central Applications 1-800-442-7747 or email: centapp@harris.com |
类似零件编号 - CD22354A |
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类似说明 - CD22354A |
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