XE0068DT Cermetek Microelectronics, XE0068DT Datasheet - Page 4

• Manufacturer Part Number: XE0068DT
• Manufacturer: Cermetek Microelectronics

Specifications of XE0068DT

• Lead Free Status / Rohs Status: Supplier Unconfirmed

XE0068DT Pin Descriptions
PIN
2-5
13
14
15
16
17
18
19
21
22
24
26
XECOM
6
7
8
9
1
VCC
D0-D3
/WR
/RD
/CS
RS0
D/V
GND
CP
ESt
St/GT
XMIT
RCVR
OH
/RI
Ring
Tip
NAME
I/O
I/O
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O
O
O
O
I/0
I
I
I
I
I
I
I
sets a -9 dbm transmit level for data transfer.
DESCRIPTION
+5 Volts
high allows the processor to write to the XE0068DT.
Read and Write determine the direction of DTMF data. A low on /RD with /WR
high allows the processor to read from the XE0068DT.
A low on Chip Select, selects the XE0068 DTMF data bus.
slects the status or control registers.
Ground
In DTMF mode CP acts as an interrupt. CP goes low when a valid DTMF Tone is
transmitted or received. In Call Progress Mode CP provides a square wave repre-
sentation of the call progress signal on the phone line.
Goes high to indicate that a valid tone pair has been detected. A momentary loss of
signal causes ESt to go low.
threshold voltage is reached. As an output, St/GT goes high to disable the guard
timer after the threshold voltage is reached.
Analog input signal to the line interface, input impedance on XMIT is typically 10
the phone line.
nal.
Ring connection to the phone line (RJ11 Pin 4).
Tip Connection to the phone line (RJ11 Pin 3)
These signals represent the 4-bit data bus which carries the DTMF information per
Read and Write determine the direction of DTMF data. A low on /WR with /RD
This input selects the register to be used. A low selects the data register and a high
A low on Voice/Data selects a transmit level of 0 dBm for voice or DTMF; a high
As an input, St/GT latches the DTMF code into the Receive Data Register when the
Hookswitch control. A high closes the internal relay to connect the equipment to
Ring Indicate, output, active low, TTL, indicates the modem is receiving a ring sig-
the chart below.
Kohms at 1800 Hz. Signals from -15 to +5 dBm will be placed on the line at -
10dBm + 1 dBm.
Analog output signal from the 2-4 wire converter, the output impedence of RCVR
is typically 10 ohms at 1800 hz.
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XE0068DT