
Features
Preliminary
MOTOROLA
MC68176 Technical Data Sheet
iii
FEATURES
2-bit A/ D converter
Supports FLEX Protocol with the MC68175 and MC68181 FLEX Decoder chips
Peak and valley 8-bit DAC detectors compensate for signal strength variation
Pin-selectable 2-Pole Butterworth Low Pass Filter
–
BW = 0: 1 Khz
±
5% (
3 dB) (for 1600 symbols/ second)
–
BW = 1: 2 Khz
±
5% (
3 dB) (for 3200 symbols/ second)
600 mV input voltage range @V
ADD
= 2.7 V and 1.8 V
100
μ
A typical operating current @ V
ADD
= 2.7 V
Three Modes of Operation:
–
Fast Track mode
–
Slow Track mode
–
Hold Acquisition
Standby mode for low power consumption
30
°
C to 85
°
C temperature range
2 V and 3 V operation
±
10% for both V
DDD
and V
ADD
Flexible supply mode (i.e., V
ADD
can be at 2 V and V
DDD
can be at 3 V or vice-versa)
For V
ADD
= 2 V, an internal charge pump is enabled to provide higher voltages for some
analog circuits.
14-pin SOIC package
ADDITIONAL SUPPORT
FLEX System Software from Motorola is a family of software components for building world-
class products incorporating messaging capabilities. FLEXstack Software is specifically
designed to support the FLEX chip IC. FLEXstack Software runs on a product host processor and
takes care of communicating with the FLEX chip IC and fully interpreting the codewords that are
passed to the host from the FLEX chip IC.
DOCUMENTATION
This document is the primary document supporting the MC68176 FLEX 2-bit A/ D.
Documentation is available from a local Motorola distributor, a Motorola semiconductor sales
office, a Motorola Literature Distribution Center, or through the Motorola DSP home page on the
Internet (the source for the latest information).