Datasheet

TL/H/5070
TP3064, TP3067 ‘‘Enhanced’’ Serial Interface CMOS CODEC/Filter COMBO
October 1991
TP3064, TP3067
‘‘Enhanced’’ Serial Interface
CMOS CODEC/Filter COMBO
É
General Description
The TP3064 (m-law) and TP3067 (A-law) are monolithic
PCM CODEC/Filters utilizing the A/D and D/A conversion
architecture shown in
Figure 1 , and a serial PCM interface.
The devices are fabricated using National’s advanced dou-
ble-poly CMOS process (microCMOS).
Similar to the TP305X family, these devices feature an addi-
tional Receive Power Amplifier to provide push-pull bal-
anced output drive capability. The receive gain can be ad-
justed by means of two external resistors for an output level
of up to
g
6.6V across a balanced 600X load.
Also included is an Analog Loopback switch and a TS
X
out-
put.
See also AN-370, ‘‘Techniques for Designing with CODEC/
Filter COMBO Circuits.’’
COMBO
É
and TRI-STATE
É
are registered trademarks of National Semiconductor Corpora-
tion.
Features
Y
Complete CODEC and filtering system including:
Ð Transmit high-pass and low-pass filtering
Ð Receive low-pass filter with sin x/x correction
Ð Active RC noise filters
Ð m-law or A-law compatible COder and DECoder
Ð Internal precision voltage reference
Ð Serial I/O interface
Ð Internal auto-zero circuitry
Ð Receive push-pull power amplifiers
Y
m-lawÐTP3064
Y
A-lawÐTP3067
Y
Designed for D3/D4 and CCITT applications
Y
g
5V operation
Y
Low operating powerÐtypically 70 mW
Y
Power-down standby modeÐtypically 3 mW
Y
Automatic power-down
Y
TTL or CMOS compatible digital interfaces
Y
Maximizes line interface card circuit density
Block Diagram
TL/H/5070–1
FIGURE 1
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.