XE0092 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

XE0092

Surface-Mount DAA Module

Unspecified 

Cermetek Microelectronics, Inc

XE0092 PIN DESCRIPTIONS

XE0092 Low-cost DAA Module

VCC 1

TX- 2

Tx+ 3

/OH 4

/RI 5

/CID 6

RX- 7

RX+ 8

GND 9

XE0092

Top View

11 TIP

10 RING

Pin Name Description

1 VCC +3.3 or 5 Volt power source for the

XE0092. VCC powers the /RI and /OH

control lines.

2 TX- TX- is the negative half of the differential

transmit data input to the XE0092 from

the host system. If the host system uses

a single ended transmit data output, that

output should be connected to TX- and

TX+ should be grounded.

3 TX+ TX+ is the positive half of the differential

transmit data input to the XE0092 from

the host system. If the host system uses

a single ended transmit data output, that

output should be connected to TX- and

TX+ should be grounded.

4 /OH Switch-hook control to the modem. /OH is

an active low input. Activating OH closes

the switch-hook causing the XE0092 to

seize the local telephone line. The

telephone line connection is dropped

when OH is deactivated.

The host can pulse OH to simulate rotary

dialing. The pulse rate in the US is ten

pulses per second. Each digit is dialed

as a series of pulses created by closure

of the hook-switch, one pulse for the digit

one to ten pulses for the digit zero. The

pulses must be asymmetrical so that the

hook-switch is closed for thirty-one

milliseconds and open for sixty-nine

milliseconds. An inter-digit delay of at

least one hundred milliseconds is

required.

Pin Name Description

5 /RI Ring Indicate output from the module. /RI

is active low. RI goes low for the duration

of each incoming ring, returning high

between rings. The XE0092 recognizes

ring voltages of twenty-eight to one

hundred fifty volts RMS in the frequency

range of sixteen to sixty-eight Hertz.

6 /CID /CID is an active low input to the XE0092.

The host drives /CID low after the first

ring to permit the Caller ID signal to be

presented on the RX outputs. The

telephone network normally sends Caller

ID information on incoming calls between

the first and second ring.

7 RX- RX- is the negative half of the differential

received data output from the XE0092. If

the host system uses a single ended

received data input, that input should be

connected to RX+ and RX- should

remain open.

8 RX+ RX+ is the positive half of the differential

received data output from the to the host

system. If the host system uses a single

ended received data input, that input

should be connected to RX+ and RX-

should remain open.

9 GND Ground connection to the XE0092. This

signal provides the reference for the /OH

input and /RI output. This pin should be

connected to the systems digital ground.

10 Ring Ring is one wire of the two-wire

telephone line connection (RJ11 Pin 3).

FCC Part 68 Rules require a 1500 volt

isolation barrier between the telephone

line and all other circuits. This isolation

must be preserved throughout the system.

Cermetek recommends 0.100 inch

spacing between traces connected to

Ring and all other conductors to preserve

this isolation

11 Tip Tip is one wire of the two-wire telephone

line connection (RJ11 Pin 4). The

telephone company places a DC

"Battery" voltage across Tip and Ring on

all public switched telephone lines. The

XE0092 accept this line battery voltage

without regard to its polarity.

©2009 Cermetek Microelectronics, Inc.

Page 2

Document No. 607-0100 Revision A (10/09)

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