MC145425P Ver la hoja de datos (PDF) - Motorola => Freescale

Número de pieza

componentes Descripción

Lista de partido

MC145425P

ISDN Universal Digital Loop Transceivers II

Motorola => Freescale 

ABSOLUTE MAXIMUM RATINGS (Voltage Referenced to VSS)

Rating

Symbol

Value

Unit

DC Supply Voltage

Voltage Any Pin to VSS

DC Current, Any Pin (Excluding VDD,

VSS)

Operating Temperature

Storage Temperature

VDD – VSS

– 0.5 to 6.5

V

V

– 0.5 to VDD + 0.5 V

I

± 10

mA

TA

– 40 to + 85

°C

Tstg

– 85 to + 150

°C

RECOMMENDED OPERATING CONDITIONS (TA = – 40 to + 85°C)

Parameter

Pins

This device contains circuitry to protect the

inputs against damage due to high static

voltages or electric fields; however, it is

advised that normal precautions be taken to

avoid applications of any voltage higher than

maximum rated voltages to this high imped-

ance circuit. For proper operation it is recom-

mended that Vin and Vout be constrained to

the range VSS ≤ (Vin or Vout) ≤ VDD. Reliability

of operation is enhanced if unused inputs are

tied to an appropriate logic voltage level (e.g.,

either VSS or VDD).

Min

Typ

Max

Unit

DC Supply Voltage

Frame Rate MC145421 (See Note)

VDD

MSI

4.5

5.0

5.5

V

—

8.0

—

kHz

MC145421/25 Frame Slip Rate (See Note)

—

—

—

0.25

%

CCI Clock Frequency

—

—

8.192

8.29

MHz

TDC/RDC Data Clocks (for Master)

—

0.128

—

4.1

MHz

DCLK

—

0.016

—

4.1

MHz

Modulation Baud Rate (CCI/16)

LO1, LO2

—

512

—

kHz

NOTE: The slave’s crystal frequency divided by 1024 must equal the master’s MSI frequency ± 0.25% for optimum operation. Also, the

8.192 MHz input at the master divided by 1024 must be within 0.048% of the master’s 8 kHz MSI clock frequency.

DIGITAL CHARACTERISTICS (VDD = 5 V, TA = – 40 to + 85°C)

Parameter

Min

Max

Unit

Input High Level

3.5

—

V

Input Low Level

—

1.5

V

Input Current, VDD

Input Current (Digital Pins)

—

15

mA

—

5

µA

Input Capacitance

—

10

pF

Output High Current (Except Tx on Master and Slave, and PD on the Slave)

VOH = 2.5

– 1.7

—

mA

VOH = 4.6 – 0.36

—

Tx Output High Current

VOH = 2.5

– 3.4

—

mA

VOH = 4.6

– 0.7

—

PD (Slave) Output High Current (See Note)

Output Low Current (Except Tx on Master and Slave, and PD on Slave)

VOH = 2.5

—

VOL = 0.4

0.36

VOL = 0.8

0.8

– 90

µA

—

mA

—

Tx Output Low Current

VOL = 0.4

1.7

VOL = 0.8

3.5

—

mA

—

PD (Slave) Output Low Current (See Note)

Tx Three–State Impedance

VOL = 0.4

30

100

60

µA

—

kΩ

XTL Output High Current

VOH = 4.6

—

– 450

µA

XTL Output Low Current

VOH = 0.4

450

—

µA

NOTE: To overdrive PD from a low level to 3.5 V, or a high level to 1.5 V requires a minimum of ± 800 µA drive capability.

ANALOG CHARACTERISTICS (VDD = 5 V, TA = 0 to 70°C)

Parameter

Modulation Differential Amplitude RL = 880 Ω (LO1 – LO2)

Modulation Differential DC Offset

Vref Voltage (Typically 9/20 S (VDD – VSS))

PCM Tone Level

Demodulator Input Amplitude

Demodulator Input Impedance (LI to Vref)

Min

Max

Unit

4.6

—

Vpeak

—

40

mV

2.0

2.5

V

– 22

– 18

dBm

50

—

mVpeak

75

300

kΩ

MC145421•MC145425

4

MOTOROLA

Share Link: