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Schottky Bipolar
8224
CLOCK GENERATOR AND DRIVER
FOR
8080A
CPU
• Single Chip Clock Generator/Driver
for 8080A
CPU
• Power-Up Reset for CPU
• Ready Synchronizing Flip-Flop
• Advanced Status Strobe
• Oscillator Output
for
External
System Timing
• C.rystal Controlled
for
Stable System
Operation
• Reduces System Package Count
The 8224
is
a single chip clock generator/driver
for
the
8080A
CPU.
It
is
controlled
by
a crystal, selected
by
the designer,
to
meet a variety
of
system
speed
requirements.
Also included
are
circuits
to
provide power-up reset, advance status strobe and synchronization
of
ready.
The 8224 provides the designer
with
a significant reduction
of
packages
used
to
generate clocks and timing
for
8080A.
PIN NAMES
RESIN
RESET INPUT
RESET
RESET OUTPUT
RDYIN
READY INPUT
READY
READY OUTPUT
SYNC
SYNC INPUT
STSTB
STATUSSTB
(ACTIVE
lOW)
rPl
!8080
rP2
CLOCKS
XTAl1
ICONNECTIONS
XTAl2
FOR
CRYSTAL
TANK
USED
WITH OVERTONE
XTAL
OSC
OSCILLATOR OUTPUT
rP2
(TTL)
rP2
elK
(TTL
lEVEL)
Vee
+5V
Voo
+12V
GND
OV
5-1