ZILOG'S NEWEST DATA COMMUNICATIONS CONTROLLERS OFFER A COST-EFFECTIVE,
POWERFUL SOLUTION

Campbell, Calif.--October 16, 1995--Zilog, Inc. (NYSE:ZLG) today announced
the Z80189 and the low-power Z8L189, the newest members of the Z180(TM)
data communications controller family. Designed for a wide range of
embedded control applications including modems, printers, terminals,
electronic games, fax machines, and wireless datacom equipment, the
devices feature integrated on-chip peripherals that reduce system level
costs.

With the new family members, Zilog continues to enhance the performance of
the industry standard Z80(R) and Z180 product line and provide code
upgrade paths for Z80 and Z180 customers.

"The Z80189/Z8L189 are cost-effective 8-bit alternatives to the more
expensive 16-bit datacom controllers," said Scott DuBose, Zilog's modem
channel director. "PC card modem manufacturers, for example, could
significantly reduce their bill of materials costs over their existing
solution using the Z80189."

Enhanced Features

The enhanced Z180 core, in the new devices, has two UART channels that have
increased in data rate from 115Kbps to 512Kbps. Two DMA channels can be
chain-linked together to transfer data with less CPU intervention.

The improved 16mA 16550 MIMIC output drive provides a direct interface to
the IBMR PC ISA bus, removing the need for 245 bus drivers.

For applications such as high speed modems that interface with the PC ISA
bus, the chips's COM port decode circuitry allows COM Ports and IRQ
settings to be set through software, eliminating the need for discrete COM
port decoder devices such as jumpers and DIP switches.

In voice modems, the PC DMA (direct memory access) enables voice packets to
transmit and receive concurrently with modem AT commands. The Z80189's PC
DMA mailbox offers a separate dedicated path from the 16550 MIMIC port for
data transfer.

Cost-Effective

Designers can use slower, less expensive RAM and ROM because the devices'
memory chip select signals validate a half clock cycle earlier than
normal.

The clock doubler reduces bill of materials costs and the number of clock
sources in multiprocessing systems by using slower, lower cost crystals in
place of faster, more expensive oscillators.

Featuring five low-power modes, the Z80189 operates at 33MHz with 5 volts
and the "standby mode" is reduced to under 20uA (micro amps). The Z8L189
operates at 20MHz with 3.3 volts.

Zilog's comprehensive support program includes evaluation boards, software
drivers to support the new UARTs and C compilers and assemblers.

Pricing and Availability

Available in 100-pin QFP and VQFP packages, the Z80189 and Z8L189 are
priced at $8.94 each for 10,000 piece quantity suggested OEM resale.
 
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