73K224BL
V.22bis, V.22, V.21, Bell 212A, 103
Single-Chip Modem w/ Integrated Hybrid
DATA SHEET
PIN DESCRIPTION (continued)
ANALOG INTERFACE AND OSCILLATOR
NAME
PIN
TYPE
DESCRIPTION
RXA
32
I
Received modulated analog signal input from the telephone line
interface.
TXA1 / TXA2
18 / 17
O
Transmit Analog (differential outputs): These pins provide the
analog output signals to be transmitted to the telephone line. The
drivers will differentially drive the impedance of the line
transformer and the line matching resistor. An external hybrid can
also be built using TXA1 as a single ended transmit signal.
XTL1 / XTL2
3 / 4
27
I
These pins are for the internal crystal oscillator requiring a
11.0592 MHz parallel mode crystal. Load capacitors should be
connected from XTL1 and XTL2 to ground. XTL2 can also be
driven from an external clock.
OH
O
OFF-HOOK RELAY DRIVER: This signal is an open drain output
capable of sinking 30mA and is used for controlling a relay. The
output is the complement of the OH register bit in the ID Register.
.
Page: 8 of 33
© 2005, 2008 TERIDIAN Semiconductor Corporation
Rev 7.1
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
