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MC145745FW

Description
IC,MODEM CIRCUIT,MODEM,CMOS,SOP,28PIN,PLASTIC
CategoryWireless rf/communication    Telecom circuit   
File Size173KB,16 Pages
ManufacturerNXP
Websitehttps://www.nxp.com
Download Datasheet Parametric View All

MC145745FW Overview

IC,MODEM CIRCUIT,MODEM,CMOS,SOP,28PIN,PLASTIC

MC145745FW Parametric

Parameter NameAttribute value
Parts packaging codeSOIC
package instructionSOP,
Contacts28
Reach Compliance Codeunknown
ECCN codeEAR99
Is SamacsysN
Other featuresDATA RATE MIN:0.3BPS
data rate1.2 Mbps
JESD-30 codeR-PDSO-G28
length17.915 mm
Number of functions1
Number of terminals28
Maximum operating temperature85 °C
Minimum operating temperature-30 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Certification statusNot Qualified
Maximum seat height2.65 mm
Nominal supply voltage5 V
surface mountYES
Telecom integrated circuit typesMODEM
Temperature levelOTHER
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
width7.51 mm
Base Number Matches1
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MC145745/D
MC145745
Product Preview
V.21/V.23 Telemeter Modem
The MC145745 is a selectable modem chip compatible with ITU V.21
(300 baud full duplex asynchronous) and V.23 mode 2 (1200 baud half duplex
asynchronous). The built–in differential line driver has the capability of driving
0 dBm into a 600
load with a 5 V single power supply. This device also
includes a DTMF generator, DTMF receiver, call–progress tone detector,
answer tone generator, and a receive timing control circuit.
Besides having a clock generator with a crystal oscillator connected to it, the
device has a divider circuit to which input of a double frequency clock is possible
from external sources, such as from a microcontroller unit (MCU). The serial
control port (SCP) permits the MCU to access internal registers for exercising
the built–in features.
A low consumption device, the MC145745 integrates various functions in a
small package. This modem IC is best suited for telemeter and other
applications of this type.
Conforms to ITU V.21 and V.23 Recommendations
DTMF Generator and Receiver for all 16 Standard Digits
Capable of Driving 0 dBm into a 600
Load (VCC = 5 V)
Automatic Gain Control (AGC) Amplifier for the DTMF Receiver
Call–Progress Tone Detector
Four–Wire Serial Data Interface (SCP)
Programmable Transmission and Carrier Detection Levels
FSK/DTMF Analog Loopback Self–Test Function
Crystal Oscillator (3.579545 MHz) and Half Divider Circuit (7.159090 MHz)
for External Inputs
Operates in the Voltage Range of 3.3 – 5.5 V
Power Down Mode (ICC < 1
µA)
28
1
FW SUFFIX
SOIC
CASE 751M
ORDERING INFORMATION
MC145745FW
SOIC
PIN ASSIGNMENT
GND
Vref
CDA
TLA
TEST 1
RxD
TxD
CD
CLKO
X1
X2
ECLK
PB0
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
RxA
TxA1
TxA2
TEST 2
SCPEN
SCPCLK
SCP Rx
SCP Tx
RESET
PB3
PB2
PB1
VCC
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
REV 0
7/96
©
Motorola, Inc. 1996
MOTOROLA
MC145745
1
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