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PDF UPB8224 Data sheet ( Hoja de datos )
| Número de pieza | UPB8224 | |
| Descripción | CLOCK GENERATOR AND DRIVER | |
| Fabricantes | NEC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de UPB8224 (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
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NEe Microcomputers, Inc.
NEe
,.,. PB8224
CLOCK GENERATOR AND DRIVER FOR
8080A PROCESSORS
DESC RIPT ION
The pPB8224 is a single chip clock generator and driver for 8080A processors.
The clock frequency is determined by a user specified crystal and is capable of
meeting the timing requirements of the entire 8080A family of processors. MOS
and TTL level clock outputs are generated.
Additional logic circuitry of the !1I'B8224 provides signals for power-up reset, an
advance status strobe and properly synchronizes the ready signal to the processor.
This greatly reduces the number of chips needed for 8080A systems.
The !1I'B8224 is fabricated using NEe's Schottky bipolar process.
FE ATU RES
• Crystal Controlled Clocks
• Oscillator Output for External Timing
• MOS Level Clocks for 8080A Processor
• TTL Level Clock for DMA Activities
• Power-up Reset for 8080A Processor
• Ready Synchronization
• Advanced Status Strobe
• Reduces System Package Count
• Available in 16-pin Cerdip and Plastic Packages
PIN CONFIGURATION
RESET
RESiN
RDYIN
READY
STSTB
GND
Vee
XTAL 1
XTAL 2
TANK
OSC
01
02
VDD
PIN NAMES
RESIN
RESET
ROY IN
READY
SYNC
$TSTB
1,)1
"2
XTAL 1
XTAl2
TANK
OSC
02 (TTL)
Vec
VDD
GND
Reset Input
Reset Output
Ready Input
Ready Output
Sync Input
Status STB
Output
Processor
Clocks
Crystal
ConnectIons
Used With
Overtone
Crystal
OSCillator
Output
1>2 eLK
(TTL Level)
+5V
+12V
OV
II
Rev/l
565
1 page  
CRYSTAL REQUIREMENTS
Tolerance .....
Resonance
Load Capacitance
Equ ivalent Resistance.
Power Dissipation (Min)
CDNote:
With tank circuit use 3rd overtone mode.
J.L PB8224
0.005% at 0° C-70° C
Series (Fundamental) CD
20-35 pF
75-20 ohms
4mW
PACKAGE OUTLINE
[lPB8224C
_----A
A '\K
L
M ,,
ITEM
A
8
C
D
E
F
G
H
I
J
K
L
"
(PLASTIC)
MILLIMETERS
194 MAX
081
254
05
1778
13
2 54 ~JI N
05 MIN
4 as ~~A x
455 MAX
762
64
-010
025
005
INCHES
076 MAX
003
010
002
010
0051
010 MIN
002 ',liN
-~~
016 fo,1AX __
018 r-."AX
030
025
001
J,tPB8224D
----- K-
ITEM
M
'I
(CERDIP)
MILLIMETERS
199 MAX
106
254
046 . 010
1778
15
2.54 MIN
05MIN
458 MAX
5.08 MAX
7.62
6.8
+ 0 10
0.25. 0.05
INCHES
0784 MAX
00ol2
010
0018 . 0004
070
0059
010 MIN
0.019 MIN
0.181 MAX
0.20 MAX
0.30
0.27
0.0098 • ~:~~:
II
8224DS-12-80-CAT
569
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet UPB8224.PDF ] | |
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