73k224bl ETC-unknow, 73k224bl Datasheet - Page 8

• Manufacturer Part Number: 73k224bl
• Description: Single-chip Modem Integrated Hybrid
• Manufacturer: ETC-unknow

73K224BL
V.22bis/V.22/V.21/Bell 212A/103
Single-Chip Modem w/ Integrated Hybrid
PIN DESCRIPTION
ANALOG INTERFACE AND OSCILLATOR
NAME
RXA
TXA1 / TXA2
XTL1 / XTL2
OH
.
18 / 17
(continued)
3 / 4
PIN
32
27
TYPE
O
O
I
I
DESCRIPTION
Received modulated analog signal input from the telephone
line interface.
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.
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.
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.
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