MC145481SD Freescale Semiconductor, MC145481SD Datasheet
MC145481SD
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MC145481SD Summary of contents
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... This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. REV 2 11/98 TN98111300 For More Information On This Product, Go to: www.freescale.com Order this document by MC145481/D MC145481 DW SUFFIX SOG PACKAGE 20 CASE 751D 1 SD SUFFIX SSOP CASE 940C 20 1 ORDERING INFORMATION MC145481DW SOG Package MC145481SD SSOP PIN ASSIGNMENT V AG Ref RO TI TI ...
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... Freescale Semiconductor, Inc Ref Figure 1. MC145481 3 V PCM Codec–Filter Block Diagram DEVICE DESCRIPTION A PCM Codec–Filter is used for digitizing and reconstruct- ing the human voice. These devices are used primarily for the telephone network to facilitate voice switching and trans- mission. Once the voice is digitized, it may be switched by digital switching methods or transmitted long distance (T1, microwave, satellites, etc ...
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... Freescale Semiconductor, Inc. PIN DESCRIPTIONS POWER SUPPLY V DD Positive Power Supply (Pin 6) This is the most positive power supply and is typically con- nected This pin should be decoupled with a 0.1 F ceramic capacitor Negative Power Supply (Pin 15) This is the most negative power supply and is typically connected ...
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... Freescale Semiconductor, Inc. RO– Receive Analog Output (Inverting) (Pin 2) This is the inverting output of the receive smoothing filter from the digital–to–analog converter. This output is capable of driving load to 0.886 V peak referenced to the V AG pin. If the device is operated half–channel with the FST pin clocking and FSR pin held low, the receive filter input will be conencted to the V AG voltage ...
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... Freescale Semiconductor, Inc. FUNCTIONAL DESCRIPTION ANALOG INTERFACE AND SIGNAL PATH The transmit portion of this device includes a low–noise, three–terminal op amp capable of driving amp has inputs of TI+ (Pin 19) and TI– (Pin 18) and its output is TG (Pin 17). This op amp is intended to be confi- gured in an inverting gain circuit ...
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... Freescale Semiconductor, Inc. Level Sign Bit + Full Scale 1 + Zero 1 – Zero 0 – Full Scale 0 Phase Sign Bit / For More Information On This Product, 6 Table 1. PCM Codes for Zero and Full Scale Mu–Law Chord Bits Step Bits Sign Bit Table 2. PCM Codes for Digital mW Mu– ...
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... Freescale Semiconductor, Inc. FST (FSR) BCLKT (BCLKR DON'T CARE 1 2 Figure 2a. Long Frame Sync (Transmit and Receive Have Individual Clocking) FST (FSR) BCLKT (BCLKR DON'T CARE 1 2 Figure 2b. Short Frame Sync (Transmit and Receive Have Individual Clocking) IDL SYNC (FST) IDL CLOCK (BCLKT) ...
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... Freescale Semiconductor, Inc. Long Frame Sync Long Frame Sync is the industry name for one type of clocking format that controls the transfer of the PCM data words. (Refer to Figure 2a.) The ‘‘Frame Sync’’ or ‘‘Enable’’ is used for two specific synchronizing functions. The first is to synchronize the PCM data word transfer, and the second is to control the internal analog– ...
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... Freescale Semiconductor, Inc. FSR pin controls whether the B1 channel or the B2 channel is used for both transmit and receive PCM data word trans- fers. When the FSR pin is low, the transmit and receive PCM words are transferred in the B1 channel, and for FSR high the B2 channel is selected ...
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... Freescale Semiconductor, Inc. phones, DSP front–end, etc.) special care must be taken to assure optimum analog transmission performance. PC BOARD MOUNTING It is recommended that the device be soldered to the PC board for optimum noise performance. If the device used in a socket, it should be placed in a low parasitic pin inductance (generally, low– ...
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... Freescale Semiconductor, Inc. MAXIMUM RATINGS (Voltages Referenced Pin) Rating DC Supply Voltage Voltage on Any Analog Input or Output Pin Voltage on Any Digital Input or Output Pin Operating Temperature Range Storage Temperature Range POWER SUPPLY ( – Characteristics DC Supply Voltage Active Power Dissipation ( Power–Down Current ( for Logic Levels Must – ...
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... Freescale Semiconductor, Inc. ANALOG ELECTRICAL CHARACTERISTICS Characteristics Input Current Input Resistance – 0 Input Capacitance Input Offset Voltage Amp Input Common Mode Voltage Range Input Common Mode Rejection Ratio Gain Bandwidth Product (10 kHz Amp ( Open Loop Gain Amp ( Equivalent Input Noise (C–Message) Between TI+ and TI– ...
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... Freescale Semiconductor, Inc. ANALOG TRANSMISSION PERFORMANCE ( 2 All Analog Signals Referenced dBm0 = 0.436 Vrms = – 5 dBm @ 600 , FST = FSR = 8 kHz, BCLKT = MCLK = 2.048 MHz Synchronous Operation – Unless Otherwise Noted) Characteristics Peak Single Frequency Tone Amplitude without Clipping Absolute Gain (0 dBm0 @ 1.02 kHz 3.0 V) Absolute Gain Variation with Temperature @ 3 ...
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... Freescale Semiconductor, Inc. DIGITAL SWITCHING CHARACTERISTICS, LONG FRAME SYNC AND SHORT FRAME SYNC ( 2 All Digital Signals Referenced – 150 pF, Unless Otherwise Noted) Ref. No. Characteristics 1 Master Clock Frequency for MCLK 1 MCLK Duty Cycle for 256 kHz Operation 2 Minimum Pulse Width High for MCLK (Frequencies of 512 kHz or Greater) ...
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... Freescale Semiconductor, Inc MCLK 1 BCLKT 12 11 FST 16 16 MSB DT 1 BCLKR 11 12 FSR MSB DR For More Information On This Product CH1 CH2 CH3 ST1 CH1 CH2 CH3 ST1 Figure 3. Long Frame Sync Timing Go to: www.freescale.com ST2 ST3 LSB ST2 ST3 LSB 15 ...
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... Freescale Semiconductor, Inc MCLK 12 1 BCLKT 20 11 FST 22 MSB DT 1 BCLKR FSR 13 MSB DR For More Information On This Product CH1 CH2 CH3 ST1 CH1 CH2 CH3 ST1 Figure 4. Short Frame Sync Timing Go to: www.freescale.com ST2 ST3 LSB ST2 ST3 LSB ...
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... Freescale Semiconductor, Inc. DIGITAL SWITCHING CHARACTERISTICS FOR IDL MODE ( 2 – 150 pF, See Figure 5 and Note 1) Ref. No. 31 Time Between Successive IDL Syncs 32 Hold Time of IDL SYNC After Falling Edge of IDL CLK 33 Setup Time of IDL SYNC Before Falling Edge IDL CLK ...
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... Freescale Semiconductor, Inc. DIGITAL SWITCHING CHARACTERISTICS FOR GCI MODE ( 2 – 150 pF, See Figure 6 and Note 1) Ref. No. 42 Time Between Successive FSC Pulses 43 DCL Clock Frequency 44 DCL Clock Pulse Width High 45 DCL Clock Pulse Width Low 46 Hold Time of FSC After Falling Edge of DCL ...
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... Freescale Semiconductor, Inc 0 AUDIO OUT + 0 Figure 7. MC145481 Test Circuit — Signals Referenced Pin 0.1 F AUDIO OUT AUDIO OUT + R L 150 0.1 F Figure 8. MC145481 Test Circuit — Signals Referenced For More Information On This Product Ref RO Mu/A PO FSR FST BCLKT BCLKR ...
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... Freescale Semiconductor, Inc 0.1 F GND J 1/2 MC74HC73 K GND 8 kHz 256 2.048 MHz Figure 9. Long Frame Sync Clock Circuit for 2.048 MHz SIDETONE REC + 3 V 0.1 F Figure 10. MC145481 Analog Interface to Handset For More Information On This Product, 20 2.048 MHz 300 R OSC IN OSC OSC ...
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... Freescale Semiconductor, Inc 600 TIP 0.5 RING 0.1 F Figure 11. MC145481 Step–Up Transformer Line Interface For More Information On This Product Ref RO- 1 PO FSR BCLKR 10 PDI Go to: www.freescale.com TI+ 18 0. kHz FST 13 PCM OUT DT 12 2.048 MHz BCLKT ...
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... Freescale Semiconductor, Inc. –A– –B– 20X 0.010 (0.25 18X –R– –P– 0.120 (0.005) For More Information On This Product, 22 PACKAGE DIMENSIONS DW SUFFIX SOG PACKAGE CASE 751D–04 P 10X 0.010 (0.25 SEATING –T– PLANE SUFFIX SSOP CASE 940C– ...
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... Freescale Semiconductor, Inc. This page intentionally left blank. For More Information On This Product, Go to: www.freescale.com 23 ...
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... Freescale Semiconductor product could create a situation where personal injury or death may occur. Should Buyer ...