am79d2251 Advanced Micro Devices, am79d2251 Datasheet
am79d2251
Related parts for am79d2251
am79d2251 Summary of contents
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... Intelligent Access Am79D2251 Dual Intelligent Subscriber Line Audio-Processing Circuit (ISLAC ) DISTINCTIVE CHARACTERISTICS High performance digital signal processor provides programmable control of all major linecard functions — 32 and 24 kb/s ADPCM to G726, as well as A-law/ -law and linear codec — Transmit and receive gain — Two-wire AC impedance — ...
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... Spurious Out-of-Band Signals at the Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Switching Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 PCM Switching Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Microprocessor Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 PCM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Master Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 PCM Switching Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 GCI Timing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 GCI Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 44-Pin PLCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 44-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Revision Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Revision A to Revision Revision B to Revision Am79D2251 ...
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... Loop resistance Integrated self-test features — Echo gain, distortion, and noise 0 to 70°C commercial operation — –40°C to 85°C extended temperature range available Small physical size Up to three relay drivers per ISLIC™ device — Configurable as test load switches Am79D2251 3 ...
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... VIMT2 VILG2 XSB2 4 Figure 1. Dual ISLAC Block Diagram IREF Clock and Reference Ch 1 Block GCI Control Digital Signal Microprocessor Processor Ch 2 Block Am79D2251 VREF MCLK FS/DCL Circuits PCLK/FS PCM DXA/DU and GCI DRA/DD Interface and TSCA/G Time Slot Assigner DCLK/S0 DIO/S1 ...
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... Am79D2251 Advanced Dual Intelligent Subscriber Line Audio- Processing Circuit Valid combinations list configurations planned to be supported in volume for this device. Consult JC the local AMD sales office to confirm availability VC of specific valid combinations, and to check on newly released valid combinations. Am79D2251 Valid Combinations 5 ...
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... Dual ISLAC 44-Pin PLCC Dual ISLAC 44-Pin TQFP Am79D2251 41 40 AGND2 39 VILG1 38 VSAB1 37 VCCA1 36 VHL1 35 VIN1 34 VOUT1 33 DGND2 32 LD1 31 CS/RST 30 DCLK/ AGND2 32 VILG1 31 VSAB1 ...
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... For GCI operation, this pin is Frame Sync. The FS signal kHz pulse that identifies the beginning of a frame. The ISLAC device references individual timeslots with respect to this input, which must be synchronized to DCL tolerant. O Control the operating modes of the two ISLIC devices connected to the dual ISLAC device. Am79D2251 Description 7 ...
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... XSB1–XSB4. This pin is a current input whose voltage is held at VREF. An internal resistor converts current flowing in this pin into a voltage to be sampled by the A/D. This pin is intended for sensing external ringer supply voltages. However, it can also be used to sense other test points when internal ringing is used. Am79D2251 Description ...
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... The ISLIC interface unit inside the ISLAC device processes information regarding the line voltages, loop currents and battery voltage levels. These inputs allow the ISLAC device to place several key ISLIC performance parameters under software control. Am79D2251 9 ...
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... Measured parameters can be compared to programmed threshold levels to set a pass/fail bit. The user can choose to send the actual PCM measurement data directly to a higher level processor by way of the voice channel. Both longitudinal and metallic resistance and capacitance can be measured, which allows leakage resistance, line capacitance, and telephones to be identified. 10 Am79D2251 ...
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... RMTi U1 Am79R241 VREF ILG TMP RLGi TMN VREF VREF VBH VBL LD GND P1 P2 RSVD P3 RYE BGND RSVD Am79D2251 VOUTi DGND RHLbi VHLi RHLdi AGND CHLdi VCCA VCC +3.3VDC VSABi VCCD VINi VLBi VIMTi U2 ISLAC VILGi BACK PLANE VREF LDi SPB ...
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... R2H R3H R1 BGND RSVD * CSS required for > 2.2 Vrms metering ** Connections shown for one channel *** DT2i is optional - Should be put if there is a chance that this chip may be replaced by Am79R251. RSRBi RSRC Am79D2251 VOUTi DGND RHLbi AGND VHLi RHLdi CHLdi VCCA VCC +3.3 VDC VSABi ...
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... V Ceramic 22 nF 20% 100 V Ceramic 100 nF 20% 100 V Protector speed up capacitor 100 V Ceramic 510 1.2 W typ 750 k 2% 1/4 W Matched to within 0.2% for initial tolerance and typ 5 V Coil DPDT Am79D2251 Comments ° ambient temperature range. 13 ...
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... Digital Supply V CCD DGND AGND 14 Test Conditions One channel activated All channels active All channels inactive –40 to +85°C Commercial 15 to 85% +3.3 V ± 5% +3.3 V ± DGND ±50 mV Am79D2251 Min Typ Max Unit TBD TBD TBD TBD mW TBD –60°C T +125°C A – ...
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... RLOAD = 1500 , VBH = 80 V Active Ringing mode, Dual ISLAC generating internal ringing Active Ringing mode, RLOAD = 1500 , VBH = 80 V, ISLAC generating internal sinusoidal ringing Loop open, in anti-sat 200 to 3400 Hz 12 Am79D2251 Typ Max Unit Note 70 V 200 ...
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... Maximum output voltage on VOUT 22 VLB1–2 operating voltage 23 Maximum output voltage on VHL (KRFB) 24 Gain from VSAB to VHL 25 Gain from VSAB to VHL 26 % error of VLB voltage (For VLB equation, see Am79R2xx/ Am79D2251 Technical Reference) 27 Capacitance load on VLB1–2 16 Condition Min –0.05 –0.50 2.36 2.0 –10 –120 0.15 Iout = ± ...
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... Measure 8000 Hz-Input frequency A-D D-A Gdisn = ±0.9375 Vin = 0 dBm0 –0.25 Gdisn = –0.9375 to 0.9375 1014 Hz; –10 dBmO dBm0 300 Hz to 3400 Hz 0 dBm0 300 Hz to 3400 Hz Am79D2251 Typ Max Unit 400 pF Receive Unit 0.5026 0.4987 Vrms 0.5025 Typ ...
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... and Z filters are disabled with null coefficients. See Figure 15-3 for Group Delay Distortion. 14. These limits reflect only the capabilities of the dual ISLAC device. 18 Condition Min 0 dBm0 1014 Hz 1014 Hz ; metallic impedance = 135 Am79D2251 Typ Max Unit Note –76 dBm0 –78 ...
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... In this section, the transmit path is defined as the analog input to the ISLAC device (VINn) to the PCM voice output of the ISLAC A-law/µ law speech compressor (See Figure 7-1 in the Am79R2xx/ Am79D2251x Technical Reference). The receive path is defined as the PCM voice input to the ISLAC speech expander to the analog output of the ISLAC device (VOUTn). All limits defined in this section are tested with and When RG is enabled, a gain of – ...
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... Frequency (Hz) Am79D2251 0.80 0.65 ...
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... A sine wave signal in the frequency band 300 to 3400 Hz with input level –9 dBm0 and signal with input level –23 dBm0 does not produce intermodulation products exceeding a level of –56 dBm0. These specifications are valid for either transmission path. and f (not harmonically related) in the range 300 1 2 Am79D2251 – f products ...
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... Am79D2251 Input Level (dBm0) Input Level (dBm0) ...
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... Fundamental Input Power (dBm0) Am79D2251 A A-Law µ-Law A 35.5dB 35.5dB B 35.5dB 35.5dB ...
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... Frequency (kHz) 4000 f – = – ------------------------- - 14 14 sin 1200 Am79D2251 Level below see Figure 19256A-012 ...
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... Frequency (kHz) Figure 13. Spurious Out-of-Band Signals Am79D2251 Level –32 dB 19256A-013 25 ...
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... Chip select pulse width, Output mode Chip select off time, output Mode Output data turn on delay Output data hold time 3 Output data turn off delay Output data valid 0 Reset pulse width 50 Am79D2251 Typ Max Unit Note –10 DCY ...
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... PCM or frame sync jitter time Parameter Period: 2.048 MHz 488.23 Period: 4.096 MHz 244.11 Period: 8.192 MHz 122.05 Rise time of clock Fall time of clock MCLK HIGH pulse width MCLK LOW pulse width PCY Am79D2251 Min. Typ Max Unit 0.122 7.8125 µ ...
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... PCM Switching Waveforms Figure 16. Microprocessor Interface (Input Mode DCLK Data DIO Valid 28 Figure 15. Master Clock Timing Data Data Valid Valid Am79D2251 38 9 ...
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... Figure 18. PCM Highway Timing for (Transmit on Negative PCLK Edge PCLK TSCA 31 DXA DRA Data Data Valid Valid Time Slot Zero, Clock Slot Zero First Bit First Second Bit Bit V IL Am79D2251 16 Three-State 30 See Note ...
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... DCL F = 4096 kHz DCL Pulse width Rise/fall time Setup time Hold time High pulse width Delay from DCL edge Delay from FS edge Data setup Data hold Am79D2251 30 See Note 4 33 Min Typ Max Unit 60 478 498 239 249 90 60 ...
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... GCI Waveforms WFH t DDF t DDC BIT BIT 7 6 DETAIL A t DCL Timing diagram valid for F Am79D2251 DCL FS DD, DU DCL 2048 or 4096 KHz DCL 31 ...
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... REF .032 TOP VIEW 44-Pin TQFP 44 1 0.95 1.05 1.00 REF. 32 .062 .083 .042 .056 .009 .015 .090 .120 .165 .180 SIDE VIEW 9.80 10.20 9.80 10.20 11.80 12.20 11 – 13 1.20 MAX 11 – 13 0.80 BSC 0.30 0.45 Am79D2251 .500 .590 REF .630 .013 .021 SEATING PLANE 16-038-SQ PL 044 DA78 6-28-94 ae 11.80 12.20 16-038-PQT-2 PQT 44 7-11-95 ae ...
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... AMD, the AMD logo and combinations thereof are trademarks of Advanced Micro Devices, Inc. Intelligent Access and WinSLAC are trademarks of Advanced Micro Devices, Inc. Product names used in this publication are for identification purposes only and may be trademarks of their respective companies. © 1999 Advanced Micro Devices, Inc. All rights reserved. Am79D2251 33 ...
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