73M223 Ver la hoja de datos (PDF) - TDK Corporation

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componentes Descripción

Fabricante

73M223

1200 Baud FSK Modem

TDK Corporation 

73M223

1200 Baud FSK Modem

PIN DESCRIPTION

PIN NO.

1

2

3

4

5

PIN NAME

VDD

RXA

CAP

RXF

FIL

6

TEST

7

7;

8

VSS

9

SYNC

10

6<1

11

RXD

12

TXD

13

OSC1

14

OSC2

15

CLK

16

TXA

DESCRIPTION

Positive Supply Voltage. Bypasses to Vss with 0.1 µF capacitor.

Receive Analog Input. Analog input from the telephone network.

Capacitor. Connect a 0.1µF capacitor between Pin 3 and ground (VSS).

Filtered Receive Analog Input

Analog Input Control. A logical 1 selects the filtered input. A logical 0 selects

the non-filtered input.

Self-Test Mode Control. Normal operation when a logical 0.A logical 1 places

the device into the self-test mode. A low appears at RXD, to indicate a

properly functioning device.

Transmitter Control. A logical 0 selects transmit mode. A logical 1 selects a

stand-by condition forcing TXA to VDD/2 VDC.

Ground

Synchronous Clock Output. Digital output synchronized with the 1200 bit/s

received data when 6<1 LV ORZ and used to sample the received data or eye

pattern. The falling edge of SYNC should be used to sample RXD. When 6<1

LV KLJK D 1200 H] FORFN LV RXWSXW

Sync Enable. A logic 0 locks the SYNC clock PLL to the 1200 baud receive

data. A logic 1 disables the receive data PLL, and connects SYNC to the 1200

HZ reference.

Receiver Digital Output

Transmitter Digital Input

Crystal Input (3.1872 MHz) or External Clock Input

Crystal Return

1200 Hz Square wave Output. Can drive up to 10 CMOS loads.

Transmitter Analog Output

ELECTRICAL SPECIFICATIONS

Recommended conditions apply unless otherwise specified.

ABSOLUTE MAXIMUM RATINGS

Operation outside these rating limits may cause permanent damage to this device.

PARAMETER

Power Supply Voltage (VDD-VSS)

Analog Input Voltage at RXA

Analog Input Voltage at RXF

Digital Input Voltage

Storage Temperature Range

Operating Temperature Range

Lead Temperature (10 secs soldering)

RATING

14 V

- 0.3 to VDD V

- 3 to VDD V

VSS – 0.3 to VDD + 0.3 V

- 65 to + 150 °C

- 25 to + 70 °C

260 °C

3

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