MC145554 suppliers, MC145554 price trend, MC145554 PDF download, circuit diagram from SeekIC

Position: Home > Datasheet list > MC1 Series > Index M > MC145554

Table of contents:
MC145554
Suppliers
DataSheet
General Description

Purchase MC145554, In-stock MC145554 From SeekIC.

MFG:MOT Package Cooled:7.2mm 16 D/C:04+

MC1 Series Datasheet download

Five Points

Part Number: MC145554

MFG: MOT

Package Cooled: 7.2mm 16

D/C: 04+

Description: A codecfilteris used for digitizing and reconstructing the humanvoice. These devices were developed primari...

MC145554 General Description

A codecfilter is used for digitizing and reconstructing the human voice. These devices were developed primarily forthe telephone network to facilitate voice switching and transmission. Once the voice is digitized, it may be switched by digital switching methods or transmitted long distance (T1,microwave, satellites, etc.) without degradation. The namecodec is an acronym from "COder" (for the A/D used to digitize voice) and "DECoder" (for the D/A used for reconstructing voice). A codec is a single device that does both the A/D and D/A conversions.

To digitize intelligible voice requires a signaltodistortion ratio of about 30 dB over a dynamic range of about 40 dB.This can be accomplished with a linear 13bit A/D and D/A, but will far exceed the required signaltodistortion ratio at amplitudes greater than 40 dB below the peak amplitude. This excess performance is at the expense of data per sample. Methods of data reduction are implemented by com-pressing te 13bit lnear scheme to companded 8bit schemes. There are two companding schemes used:Mu255 Law specifically in North America, and ALawspecifically in Europe. These companding chemes are accepted world wide. These companding schemes follow asegmented or "piecewiselinear" curve formatted as sign bit, three chord bits, and four step bits. For a given chord, all sixteen of the steps have the same voltage weighting. As the voltage of the analog input increases, the four step bits incre-ment and carry o the three hord bits which increment.

The D/A process reconstructs a staircase version of thedesired inband signal, which has spectral images of the inband signal modulated about the sample frequency and its harmonics. These spectral images, called aliasing components, need to be attenuated to obtain the desired signal.The lowpass filter used to attenuate these aliasing components is typically called a reconstruction or smoothing filter.The MC145554/57/64/67 PCM CodecFilters have the codec, both presampling and reconstruction filters, and aprecision voltage reference onchip, and require no externalcomponents.

MC145554 Maximum Ratings

Rating	Symbol	Value	Unit
DC Supply Voltage V_CC toV_BB V_CC to GNDA V_BB to GNDA		0.5 to + 13 0.3 to + 7.0 7.0 to + 0.3	V
Voltage on Any Analog Input or Output Pin		V_BB 0.3 to V_^CC+ 0.3	V
Voltage on Any Digital Input or Output Pin		GNDA 0.3 toV+ 0.3	V
Operating Temperature Range	T_A	40 to + 85	°C
Storage Temperature Range	T_stg	85 to + 150	°C

MC145554 Features

Fully Differential Analog Circuit Design for Lowest Noise
Performance Specified for Extended Temperature Range of 40 to + 85°C
Transmit BandPass and Receive LowPass Filters OnChip
Active RC PreFiltering and PostFiltering
MuLaw Companding MC145554
ALaw Companding MC145557
OnChip Precision Voltage Reference (2.5 V)
Typical Power Dissipation of 40 mW, Power Down of 1.0 mW at ± 5V

MC145554 Connection Diagram

MC145554 datasheet

MC145554
PDF/DataSheet Download

Datasheet: MC145554
File Size: 351964 KB
Manufacturer: Motorola
Click here to Download

·MC1000
MOTOROLA [Motorola, Inc]
6-INPUT GATES
205166 KB
·MC1001
MOTOROLA [Motorola, Inc]
6-INPUT GATES
205166 KB
·MC100193
ON SEMICONDUCTOR
5V ECL Error Detection/Correction Circuit
124927 KB
·MC1002
MOTOROLA [Motorola, Inc]
6-INPUT GATES
205166 KB
·MC100210
ON SEMICONDUCTOR
5V ECL Dual 1:4, 1:5 Differential Fanout Buffer
225280 KB
·MC100241
ON SEMICONDUCTOR
5V ECL 8-Bit Scannable Register
225280 KB
·MC100256
ON SEMICONDUCTOR
5V ECL 3 Bit 4:1 Mux Latch
124927 KB
·MC1003
MOTOROLA [Motorola, Inc]
6-INPUT GATES
205166 KB

Related Part Number

MC145554 Relative Products

MC14554B
The MC14554B 2 x 2bit parallel binary multiplier is constructed with complementary MOS (CMOS) enhancement mode devices. The multiplier can perform the multiplication of two binary numbers and simultaneously add two other binary numbers to the product. The MC...
mc145540
The MC145540 ADPCM Codec is a single chip implementation of a PCM codec-filter and an ADPCM encoder/decoder, and therefore provides an efficient solution for applications requiring the digitization and compression of voiceband signals. MC145540 is designed t...
MC14553BDW
MC14553BCPG
IC COUNTER BCD 3DIGIT CMOS 16DIP
MC14553BCP
IC COUNTER BCD 3DIGIT CMOS 16DIP
MC14553B

Hotspot Suppliers Product

Product List

LA76818A
Price: 2.5-4.18 USD
I2C Bus Control IC, Monolithic Linear IC, DIP, Single crystal multiformat system, 5V
UPC2711TB-E3
Price: 0.1-1 USD
MMIC Wideband Amplifier, SOT-363, 6V
M29W040B
Price: 0.1-0.5 USD
4 Mbit, non-volatile memory, 32PLCC, 55ns, 2.7 V ~ 3.6 V, RoHS Compliant
SM8S36A-E3-2D
Price: 1.2-4 USD
DO-218, uppressor, 700A
TPA3110D2PWPR
Price: 1.3-1.4 USD
15-W, FILTER-FREE STEREO, CLASS-D AUDIO, POWER AMPLIFIER, HTSSOP, -0.3 V to 30 V Supply Voltage
LTC3411EMS#TRPBF
Price: 5-10 USD
constant frequency, synchronous, step- down DC/DC converter, MSOP10, –0.3V to 6V, High Frequency O...
CF745-04SO
Price: 0.1-1 USD
CMOS microcontroller, SOP, 0 V to +7.5 V
AT89C4051-24PU
Price: 0.64-0.69 USD
Microcontroller unit(MCU), 8-bit, DIP-20, low-voltage, high-performance, CMOS
216CBS3AGA21H
Price: 8-16 USD
216CBS3AGA21H, BGA, ATI Technologies Inc
6MBP50NA060
Price: 38-45 USD
Intelligent Power Module, 450V, 1mA, Fuji Electric
R2A30405
Price: 4.5-6 USD
2.0A Super Barrier Rectifier, QFN, R2A30405, Renesas
CC2430ZF128RTCR
Price: 4.89-6.67 USD
48-VQFN, System-on-Chip (SoC) solution, Powerful DMA functionality, 3.9V

Map list: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9 All