DATA BULLETIN
MX609
Features
Single Chip full Duplex CVSD CODEC
On-chip Input and Output Filters
Programmable Sampling Clocks
3- or 4-bit Companding Algorithm
Powersave Capabilities
Low Power, 5.0V Operation
PCN/PCS DELTA
MODULATION CODEC
Applications
Digital PCN/PCS Systems
Digital Cordless Phones
Digital Delay Lines
Digital Voice Storage
Multiplexers, Switches, and
Phones
Time Domain Scramblers
DATA ENABLE
ENCODER FORCE IDLE*
ENCODER INPUT
V
DD
V
SS
XTAL/CLOCK
XTAL
ENCODER DATA CLOCK
DECODER DATA CLOCK
V
BIAS
MODE 1
MODE 2
ALGORITHM
POWERSAVE
DECODER INPUT
CLOCK MODE
LOGIC
ENCODER
OUTPUT
MOD
f
1
f
0
CLOCK RATE
GENERATORS
f
2
SAMPLING RATE
CONTROL
3 or 4 BIT
f
3
DEMOD
f
1
DECODER
OUTPUT
DECODER FORCE IDLE*
*Available on J,P & LH
package styles only
The MX609 is a Continuously Variable Slope Delta Modulation (CVSD) Codec designed for use in cordless
telephones. The device is suitable for applications in delta multiplexers, switches and phones. Encoder input
and decoder output switched capacitor filters are incorporated on-chip.
Sampling clock rates can be programmed to 16, 32 or 64K bits/second from an internal clock generator or
externally injected in the 8 to 64K bits/second range. The internal clocks are derived from an on-chip
reference oscillator driven by an externally connected crystal. The sampling clock frequency is output for the
synchronization of external circuits.
The encoder has an enable function for use in multiplexer applications. When not enabled the encoder output
remains in a high-impedance “tri-state” mode.
Companding circuits may be operated with an externally selectable 3- or 4-bit algorithm. The device may be
put in standby mode when Powersave is selected.
The MX609 operates with a supply voltage of 5.0V and is available in the following packages: 24-pin PLCC
(MX609LH), 16-pin SOIC (MX609DW), 22-pin CERDIP (MX609J), and 22-pin PDIP (MX609P).
1998
MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480069.005
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All Trademarks and service marks are held by their respective companies.
CMLMICRO [ CML MICROCIRCUITS ]
