MC14555 MOTOROLA [Motorola, Inc], MC14555 Datasheet

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MC14555

Manufacturer Part Number
MC14555
Description
PCM Codec-Filter
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet

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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
PCM Codec-Filter
PCM Codec–Filters. These devices perform the voice digitization and
reconstruction as well as the band limiting and smoothing required for PCM
systems. They are designed to operate in both synchronous and asynchronous
applications and contain an on–chip precision voltage reference. The
MC145554 (Mu–Law) and MC145557 (A–Law) are general purpose devices
that are offered in 16–pin packages. The MC145564 (Mu–Law) and MC145567
(A–Law), offered in 20–pin packages, add the capability of analog loopback and
push–pull power amplifiers with adjustable gain.
to the encoder section. The encoder section immediately low–pass filters the
analog signal with an active R–C filter to eliminate very–high–frequency noise
from being modulated down to the pass band by the switched capacitor filter.
From the active R–C filter, the analog signal is converted to a differential signal.
From this point, all analog signal processing is done differentially. This allows
processing of an analog signal that is twice the amplitude allowed by a
single–ended design, which reduces the significance of noise to both the
inverted and non–inverted signal paths. Another advantage of this differential
design is that noise injected via the power supplies is a common–mode signal
that is cancelled when the inverted and non–inverted signals are recombined.
This dramatically improves the power supply rejection ratio.
passes the analog signal from 200 Hz to 3400 Hz before the signal is digitized
by the differential compressing A/D converter.
converter. The output of the D/A is low–pass filtered at 3400 Hz and sinX/X
compensated by a differential switched capacitor filter. The signal is then filtered
by an active R–C filter to eliminate the out–of–band energy of the switched
capacitor filter.
standard clock formats. They also maintain compatibility with Motorola’s family
of TSACs and MC3419/MC34120 SLIC products.
its reliable low–power performance and proven capability for complex
analog/digital VLSI functions.
MC145554/57 (16–Pin Package)
MC145564/67 (20–Pin Package) — All of the Features of the MC145554/57 Plus:
REV 1
9/95 (Replaces ADI1517)
MOTOROLA
The MC145554, MC145557, MC145564, and MC145567 are all per channel
These devices have an input operational amplifier whose output is the input
After the differential converter, a differential switched capacitor filter band
The decoder accepts PCM data and expands it using a differential D/A
These PCM Codec–Filters accept both long–frame and short–frame industry
The MC145554/57/64/67 family of PCM Codec–Filters utilizes CMOS due to
Motorola, Inc. 1995
Fully Differential Analog Circuit Design for Lowest Noise
Performance Specified for Extended Temperature Range of – 40 to + 85 C
Transmit Band–Pass and Receive Low–Pass Filters On–Chip
Active R–C Pre–Filtering and Post–Filtering
Mu–Law Companding MC145554
A–Law Companding MC145557
On–Chip Precision Voltage Reference (2.5 V)
Typical Power Dissipation of 40 mW, Power Down of 1.0 mW at
Mu–Law Companding MC145564
A–Law Companding MC145567
Push–Pull Power Drivers with External Gain Adjust
Analog Loopback
5 V
MC145554 MC145557 MC145564 MC145567
20
16
20
20
16
16
1
1
1
1
1
MC145554
MC145557
MC145564
MC145567
1
CERAMIC PACKAGE
CERAMIC PACKAGE
SOG PACKAGE
Order this document
SOG PACKAGE
MC145564/67
MC145554/57
MC145554/57
MC145554/57
MC145564/67
MC145564/67
DW SUFFIX
PLASTIC DIP
PLASTIC DIP
CASE 751D
DW SUFFIX
CASE 751G
CASE 620
CASE 648
CASE 732
CASE 738
L SUFFIX
P SUFFIX
L SUFFIX
P SUFFIX
by MC145554/D
1

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MC14555 Summary of contents

Page 1

... Mu–Law Companding MC145554 A–Law Companding MC145557 On–Chip Precision Voltage Reference (2.5 V) Typical Power Dissipation of 40 mW, Power Down of 1 MC145564/67 (20–Pin Package) — All of the Features of the MC145554/57 Plus: Mu–Law Companding MC145564 A–Law Companding MC145567 Push–Pull Power Drivers with External Gain Adjust ...

Page 2

... VPO + –1 * BAND–GAP VOLTAGE REF – VPO – VPI RC ACTIVE LOW–PASS FILTER * MC145564 and MC145567 only. MC145554 MC145557 MC145564 MC145567 2 PIN ASSIGNMENTS MC145564, MC145567 VPO + – GNDA VPO – VPI ...

Page 3

... The low–pass filter used to attenuate these aliasing compo- nents is typically called a reconstruction or smoothing filter. The MC145554/57/64/67 PCM Codec–Filters have the codec, both presampling and reconstruction filters, and a precision voltage reference on–chip, and require no external components ...

Page 4

... VPO– Voltage Power Output (Inverted) (MC145564/67 Only) This inverted output of the receive push–pull power ampli- fiers can drive 300 to 3.3 V peak. MC145554 MC145557 MC145564 MC145567 4 VPO+ Voltage Power Output (Non–Inverted) (MC145554/67 Only) This non–inverted output of the receive push–pull power ...

Page 5

... Step Bits Sign Bit MC145554 MC145557 MC145564 MC145567 Chord Bits Step Bits ...

Page 6

... Characteristic Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Input Low Current Input High Current Output Current in High Impedance State MC145554 MC145557 MC145564 MC145567 6 Symbol Value Unit against damage due to high static voltages or – 0 electric fields; however advised that – ...

Page 7

... Negative, 25 kHz to 50 kHz VPI VPI VPI VPO+ or VPO– VPO– VPO+ or VPO– to GNDA R load = 600 R load = 1200 R load = kHz kHz VPO+ to VPO– kHz MC145554 MC145557 MC145564 MC145567 Typ Max Unit — 0.05 0 — M — ...

Page 8

... – 5%) Gain vs Level Tone (Relative to – 10 dBm0, 1.02 kHz) Gain vs Level Pseudo Noise CCITT G.712 (MC145557/67 A–Law Relative to – 10 dBm0) Total Distortion, 1.02 kHz Tone (C–Message) Total Distortion With Pseudo Noise CCITT G.714 (MC145557/67 A–Law) Idle Channel Noise (For End–End and A/D, Note 1) (MC145554/64 Mu– ...

Page 9

... MC145554 MC145557 MC145564 MC145567 Typ Max Unit 1.536 — MHz 1.544 — 2.048 — — — ns — — ns — — ns — — — ...

Page 10

... d(BTS) MCLK X MCLK R BCLK h(BF) t h(F) t su( MSB D X BCLK h(BF) t h(F) t su( MSB MC145554 MC145557 MC145564 MC145567 10 t w(M) t su(MFB) t su(BRM d(BD) CH1 CH2 CH3 ST1 h(BD) t su(DB) CH1 CH2 CH3 ST1 Figure 1. Short Frame Sync Timing ...

Page 11

... MSB MOTOROLA t su(MFB) t su(BRM h(BFI) t d(BD) CH1 CH2 CH3 ST1 h(BFI) t h(BD) t su(DB) CH1 CH2 CH3 ST1 Figure 2. Long Frame Sync Timing MC145554 MC145557 MC145564 MC145567 d(ZC) t d(ZC) ST3 LSB ST2 h(BD) ST2 ST3 LSB 11 ...

Page 12

... V ANALOG OUT + 5 V 1.544 MHz/ 2.048 MHz ADCPM IN POWER–DOWN MC145554 MC145557 MC145564 MC145567 GNDA – MC145554/ BCLK R / CLKSEL BCLK X 8 MCLK R / PDN MCLK X ...

Page 13

... V MJD243 1N4002 2 1 1N4002 – NOTE: Six resistors and two capacitors on the two–wire side can be 5% tolerance. Figure 4. A Complete Single Party Channel Unit Using MC145554/57 PCM Codec–Filter and MC33120 SLIC MOTOROLA MC33120 ...

Page 14

... HANDSET RJ–1 500 1 + RCVR + 5 V (WHITE) 500 MIC (RED) – RCVR 0.1 F (WHITE) – MIC (BLK) MC145554 MC145557 MC145564 MC145567 14 “S” TRANSCEIVER + 5 V MC145474P TE/ ISET SYNC 21 TX+ CLK + TX– ...

Page 15

... MC145554 MC145557 MC145564 MC145567 Normalized Decode Step Step Step Levels 8031 4191 2079 1023 495 231 1 1 ...

Page 16

... NOTES: 1. Characteristics are symmetrical about analog zero with sign bit = 0 for negative analog values. 2. Digital code includes alternate bit inversion, as specified by CCITT. MC145554 MC145557 MC145564 MC145567 16 Digital Code Sign Chord Chord Chord Step 1 ...

Page 17

... SEATING –T– PLANE MC145554 MC145557 MC145564 MC145567 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION F MAY NARROW TO 0.76 (0.030) WHERE THE LEAD ENTERS THE CERAMIC BODY. INCHES ...

Page 18

... D 16X 0.010 (0.25 14X SEATING PLANE MC145554 MC145557 MC145564 MC145567 18 DW SUFFIX SOG PACKAGE CASE 751G–02 (MC145554/57 0.010 (0.25 –T– M SEATING PLANE L SUFFIX CERAMIC PACKAGE CASE 732– ...

Page 19

... SEATING –T– PLANE M MC145554 MC145557 MC145564 MC145567 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. INCHES MILLIMETERS DIM MIN ...

Page 20

... P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 MFAX: RMFAX0@email.sps.mot.com – TOUCHTONE (602) 244–6609 INTERNET: http://Design–NET.com MC145554 MC145557 MC145564 MC145567 20 JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315 HONG KONG: Motorola Semiconductors H.K. Ltd. ...

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