파트넘버.co.kr ML145443 데이터시트 PDF


ML145443 반도체 회로 부품 판매점

(ML145442 / ML145443) Single-Chip 300-Baud Modem



LANSDALE Semiconductor 로고
LANSDALE Semiconductor
ML145443 데이터시트, 핀배열, 회로
www.DataSheet4U.com
ML145442
ML145443
Single–Chip 300–Baud Modem
Legacy Device: Motorola MC145442B, MC145443B
The ML145442 and ML145443 silicon–gate CMOS single–chip low–speed
modems contain a complete frequency shift keying (FSK) modulator, demod-
ulator, and filter. These devices are compatible with CCITT V.21 (ML145442)
and Bell 103 (ML145443) specifications. Both devices provide full–duplex or
half–duplex 300–baud data communication over a pair of telephone lines.
They also include a carrier detect circuit for the demodulator section and a
duplexer circuit for direct operation on a telephone line through a simple
transformer.
This Device Offers The Following Performance Features:
• ML145442 Compatible with CCITT V.21
• ML145443 Compatible with Bell 103
• Low–Band and High–Band Band–Pass Filters On–Chip
• Simplex, Half–Duplex, and Full–Duplex Operation
• Originate and Answer Mode
• Analog Loopback Configuration for Self Test
• Hybrid Network Function On–Chip
• Carrier Detect Circuit On–Chip
• Adjustable Transmit Level and CD Delay Timing
• On–Chip Crystal Oscillator (3.579 MHz)
• Single +5 V Power Supply Operation
• Internal Mid–Supply Generator
• Power–Down Mode
• Pin Compatible with MM74HC943
• Capable of Driving –9 dBm into a 600 W Load
• Operating Temperature Range = TA –40° to +85°C
20
1
P DIP 20 = RP
PLASTIC DIP
CASE 738
20
1
SOG 20 = -6P
SOG PACKAGE
CASE 751D
CROSS REFERENCE/ORDERING INFORMATION
PACKAGE
MOTOROLA
LANSDALE
P DIP 20 H
SO 20W
P DIP 20 H
SO 20W
MC145442BP
MC145442BDW
MC145443BP
MC145443BDW
ML145442RP
ML145442-6P
ML145443RP
ML145443-6P
Note: Lansdale lead free (Pb) product, as it
becomes available, will be identified by a part
number prefix change from ML to MLE.
PIN ASSIGNMENT
DSI 1
LB 2
CD 3
CDT 4
RxD 5
VDD 6
CDA 7
Xout 8
Xin 9
FB 10
20 TLA
19 VAG
18 Exl
17 TxA
16 RxA1
15 RxA2
14 SQT
13 MODE
12 VSS
11 TxD
Page 1 of 11
www.lansdale.com
Issue bB


ML145443 데이터시트, 핀배열, 회로
ML145442, ML145443
www.DataSheet4U.com
LANSDALE Semiconductor, Inc.
BLOCK DIAGRAM
RxA2 15
RxA1 16
+
AAF S/H
LOW–BAND
BPF
HIGH–BAND
BPF
AC AMP
*
LB 2
MODE 13
SQT 14
TxD 11
TLA 20
Xout
Xin
8
9
MODE
CONTROL
MODULATOR
OSCILLATOR
CLOCK
DIVIDER
* Refer to the FB pin description.
SMOOTHING
FILTER
SAMPLING CLOCK: 77.82 kHz
SAMPLING CLOCK: 19.46 kHz
INTERNAL
VAG
ANALOG
GROUND
GENERATOR
4
7
CARRIER 3
DETECT
CDT
CDA
CD
DEMOD 5 RxD
10
1
FB
DSI
– 17 TxA
+ 18 ExI
19 VAG
6 VDD
12
VSS
ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to VSS)
Rating
Symbol
Value
Supply Voltage
DC Input Voltage
DC Output Voltage
Clamp Diode Current, per Pin
DC Output Current, per Pin
Power Dissipation
Operating Temperature Range
Storage Temperature Range
VDD
Vin
Vout
IIK, IOK
Iout
PD
TA
Tstg
–0.5 to 7.0
–0.5 to VDD + 0.5
–0.5 to VDD + 0.5
±20
±28
500
–40 to 85
–65 to 150
Unit
V
V
V
mA
mA
mW
°C
°C
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Min
Max Unit
Supply Voltage
VDD 4.5 5.5 V
DC Input or Output Voltage
Vin, Vout
0
VDD
V
Input Rise or Fall Time
tr, tf — 500 ns
Crystal Frequency*
fcrystal
3.2
5.0 MHz
* Changing the crystal frequency from 3.579 MHz will change the output frequencies. The
change in output frequency will be proportional to the change in crystal frequency.
This device contains circuitry to protect the
inputs against damage due to high static volt-
ages or electric fields; however, it is advised that
normal precautions be taken to avoid application
of any voltage higher than maximum rated
voltages to this high impedance circuit. For
proper operation it is recommended that Vin and
Vout be constrained to the range VSS (Vin or
Vout) VDD).
Unused inputs must always be tied to an
appropriate logic voltage level (e.g., either VSS
or VDD).
Page 2 of 11
www.lansdale.com
Issue bB




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ML145442

(ML145442 / ML145443) Single-Chip 300-Baud Modem - LANSDALE Semiconductor



ML145443

(ML145442 / ML145443) Single-Chip 300-Baud Modem - LANSDALE Semiconductor