MC145423DT Ver la hoja de datos (PDF) - Freescale Semiconductor

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MC145423DT

Universal Digital Loop Transceiver (UDLT-3)

Freescale Semiconductor 

Freescale Semiconductor, Inc.

MC145423

DIGITAL CHARACTERISTICS (VDD = 5 V ±10%, TA = –40° to 85°C, Unless Otherwise Stated)

Parameter

Min

Max

Unit

Input High Level

Input Low Level

Input Current (Digital Pins)

VDD x 0.7

—

V

—

VDD x 0.3

V

—

±1.0

µA

Input Current LI

—

±100

µA

Input Capacitance

—

7.5

pF

Output High Current (Excluding Tx and PD)

Output Current Low (Excluding Tx and PD)

VOH = VDD – 0.5 V

–1.6

VOL = 0.4V

1.6

—

mA

—

mA

Tx Output High Current

Tx Output Low Current

PD Output High Current — Slave Mode*

PD Output Low Current — Slave Mode*

Tx, SDO1, SDO2, and VD Three-State Current

VOH = 2.5 V

–3.4

VOH = VDD – 0.5 V

–2.5

VOL = 0.4 V

2.5

VOL = 0.8 V

3.5

VOH = 2.5 V

–90

VOH = VDD – 0.5 V

–10

VOL = 0.8 V

100

VOL = 0.4 V

60

—

—

mA

—

—

mA

—

—

µA

—

—

µA

—

±10.0

µA

XTAL Output High Current

VOH = VDD – 0.5 V

–450

—

µA

XTAL Output Low Current

VOL = 0.4 V

450

—

µA

* 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 ±10%, TA = –40° to 85°C)

Parameter

Min

Modulation Differential Amplitude (RL = 440 Ω)

LO1 to LO2

4.5

Modulation Differential Offset

0

Vref Voltage, Typically 9/20 x (VDD – VSS)

2.0

PCM Tone Level

–22

Demodulator Input Amplitude*

0.05

Demodulator Input Impedance (LI to Vref)

50

* The input level into the demodulator to reliably demodulate incoming bursts. Input referenced to Vref.

Max

Unit

6.0

Vp-p

40

mV

2.5

V

–18

dBm

2.5

Vpeak

300

kΩ

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