MC145442DW 查看數據表（PDF） - Motorola => Freescale

零件编号

产品描述 (功能)

生产厂家

MC145442DW

Single-Chip 300-Baud Modem

Motorola => Freescale 

DC ELECTRICAL CHARACTERISTICS (VDD = 5.0 V ± 10%, TA = – 40 to + 85°C)

Characteristic

Symbol

Min

High–Level Input Voltage

LB

Xin, TxD, Mode, SQT

Low–Level Input Voltage

LB

Xin, TxD, Mode, SQT

High–Level Output Voltage

IOH = 20 µA

IOH = 2 mA

IOH = 20 µA

CD, RxD

CD, RxD

Xout

Low–Level Output Voltage

IOL = 20 µA

IOL = 2 mA

IOL = 20 µA

CD, RxD

CD, RxD

Xout

Input Current

LB, TxD, Mode, SQT

RxA1, RxA2

Xin

Quiesent Supply Current (Xin or fcrystal = 3.579 MHz)

Power–Down Supply Current

VIH

VIL

VOH

VOL

Iin

IDD

VDD – 0.8

3.15

—

—

VDD – 0.1

3.7

—

—

—

—

—

—

—

—

—

Input Capacitance

Xin

Cin

—

All Other Inputs

—

VAG Output Voltage (IO = ± 10 µA)

CDA Output Voltage (IO = ± 10 µA)

Line Driver Feedback Resistor

VAG

2.4

VCDA

1.1

Rf

10

Typ

—

—

—

—

—

—

VDD – 0.05

—

—

0.05

—

10

—

7

200

10

—

2.5

1.2

20

AC ELECTRICAL CHARACTERISTICS

(VDD = 5.0 V ± 10%, TA = – 40 to + 85°C, Crystal Frequency = 3.579 MHz ± 0.1%; See Figure 1)

Characteristic

Min

Typ

TRANSMITTER

Power Output on TxA

RL = 1.2 kΩ, RTLA = ∞

RL = 1.2 kΩ, RTLA = 5.5 kΩ

– 13

– 12

– 10

–9

Second Harmonic Power

RL = 1.2 kΩ

RECEIVE FILTER AND HYBRID

—

– 56

Hybrid Input Impedance RxA1, RxA2

40

50

FB Output Impedance

—

16

Adjacent Channel Rejection

– 48

—

DEMODULATOR

Receive Carrier Amplitude

– 48

—

Dynamic Range

—

36

Bit Jitter (S/N = 30 dB, Input = – 38 dBm, Bit Rate = 300 baud)

—

100

Bit Bias

—

5

Carrier Detect Threshold

(CDA = 1.2 V or CDA grounded through a 0.1 µF capacitor)

On to Off

—

– 44

Off to On

—

– 47

Max

—

—

0.8

1.1

—

—

—

0.1

0.4

—

± 1.0

± 12

± 10

10

300

—

10

2.6

1.3

30

Max

– 11

–8

—

—

—

—

– 12

—

—

—

—

—

Unit

V

V

V

V

µA

mA

µA

pF

V

V

kΩ

Unit

dBm

dBm

kΩ

kΩ

dBm

dBm

dB

µs

%

dBm

MOTOROLA

MC145442•MC145443

3

Share Link: