DM-COP8/44P National Semiconductor, DM-COP8/44P Datasheet - Page 225

• Manufacturer Part Number: DM-COP8/44P
• Description: CABLE FOR DEBUG MODULE 44-PLCC
• Manufacturer: National Semiconductor

Specifications of DM-COP8/44P

• Accessory Type: 44-PLCC Target Cable
• For Use With/related Products: MetaLink Debug Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *DM-COP8/44P

4.12.1 Typical Application Requirements
Tone Dialing
The DTMF function can be accomplished in software and a 6-bit R/2R resistor D/A
network. The program size including tables can be approximately 300 bytes of COP8
code. This software approach can guarantee a frequency tolerance of less than 1.5% and
harmonic distortion of less than 27 dB.
• Programmable I/O
• LED direct drive
• Sufficient I/O in a small package
• Schmitt trigger inputs
• Smooth migration from a smaller to a larger device
DUPLEXER
RF AMP
RF AMP
BASE
AC I/P
COIL
120V
3.58
MHz
MIXER
LOCAL
ADAPTOR
OSC
AC/DC
LM3361A
TXPWR
CONTROL
Figure 4-19 Base Block Diagram
TRANSMITTER
MICROCONTROLLER
DETECTOR
BUFFER
IF AMP
DATA
AND
COP8SAB7
TXDATA
REGULATOR
7806
TXMUTE
DC 6V
DETECTOR
40 Hz
40 Hz
COP8SAx7 APPLICATION IDEAS
BEF
CHARGE
DETECT
CHARGING
CIRCUIT
RESISTOR
LADDER
DTMF
INTERFACE
CONTROL
TEL LINE
DETECT
RELAY
RING
+
–
LINE
TEL
4-33