Voltage References

PBX Architecture (Analog Transmission)
PCM Mono-Circuits Codec-Filters
(CMOS LSI)
MC14SS00 Series Case 620, 64B, 70B, 726, 736, 751, 776
The Mono-circuits perform the digitizing and restoration of
the analog signals. In addition to these important functions,
Motorola's family of pulse-code modulation mono-circuits also
provides the band-limiting filter functions - all on a single
monolithic CMOS chip with extremely low power dissipation.
The Mono-circuits require no external components. They
incorporate the bandpass filter required for antialiasing and 60
Hz rejection, the AlD-D/A conversion functions for either U.S.
Mu-Law or European A-Law companding formats, the lowpass
filter required for reconstruction smoothing, an on-board
precision voltage reference, and a variety of options that lend
flexibility to circuit implementations. Unique features of
Motorola's Mono-circuit family include wide power supply
range (6 to 13 V) selectable on-board voltage reference (2.5,
3.1, or 3.B V), and TTL or CMOS I/O interface.
Motorola supplies five versions in this series. The
MC145500, MC145503 and MC145505 are general-purpose
devices in 16 pin packages designed to operate in digital
telephone or line card applications. The MC145501 is the
same device (in an 1 B pin package) that offers the capability
of selecting from three peak overload voltages (2.5, 3.15 and
3.7B V). The MC145502 is the full-feature device that presents
all olthe options available on the chip. This device is packaged
in a 22 pin DIP and 2B pin chip carrier package.
Txl_-----,
- Tx
+ Tx
VAG
RxG---....
RxO
VSS­
Voo-
MOTOROLA LINEAR/INTERFACE ICs DEVICE DATA
8-8
TOC
TOE
TOO
CCI
MSI
RSI
Vrer
ROD
RCE
ROC
__ POI
-- MulA
-- VIS