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CDP1872C fiches techniques PDF

GE - High-Speed 8-Bit Input and Output Ports

Numéro de référence CDP1872C
Description High-Speed 8-Bit Input and Output Ports
Fabricant GE 
Logo GE 





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CDP1872C fiche technique
_____________________________________ CMOS Peripherals
CDP1872C, CDP1874C, CDP1875C
(51 22 VDD
010 21 017
000
20 007
01 I
19 016
DO I
012 -
18 006
17 oro
002 16 005
Dt3 ~ 8
15 014
003 ---
14 004
CLOCK
~~~
13 - CLR
Vss ---~___ I.T- C52
TOP vIE W
CDP1872C Input Port
TERMINAL ASSIGNMENT
High-Speed 8-Bit Input and Output Ports
Features:
• Parallel 8-bit input/output register with buffered outputs
• High-spead data-in to data-out:
85 ns (max.) at Vee = 5 V
• Flexible applications in microprocessor systems as
buffers and latches
• High order address-latch capability in CDP1800 series
microprocessor systems
• Output sink current = 5 mA (min.) at Vee = 5 V
• 3-state output - CDP1872C and CDP1874C
The RCA-COP1872C, COP1874C and COP1875C devices
are high-speed 8-bit parallel input and output ports designed
for use in the COP1800 microprocessor system and for
general use in other microprocessor systems. The
CDP1872C and COP1874C are 8-bit input ports; the
COP1875C is an 8-bit output port.
These devices have flexible capabilities as buffers and data
latches and are reset by CLR input when the data strobe is
not active.
The CDP1872C and CDP1874C are functionally identical
except for device selects. The CDP1872C has one active
low and one active high select; the COP1874C has two
active high device selects. These devices also feature 3-
state outputs when deselected. Data is strobed into the
register on the leading edge of the CLOCK and latched on
the trailing edge of the CLOCK.
The CDP1875C is an output port with data latched into the
registers when the device selects are active. There are two
active high and one active low selects. The output buffers
are enabled at all ti meso
..
These devices are supplied in 22-lead hermetic, dual-in-line
side-brazed ceramic packages (0 suffix) and in 22-lead
dual-in-line plastic package (E suffix).
CSI
010
DOD
01 I
001
012
002
013
003
CLOCK
VSS
22
21
20
4 19
5 18
17
16
15
14
10 13
" 12
TOP VIEW
VDD
017
007
016
006
015
005
014
004
eLR
CS2
92CS- 33011
CDP1874C Input Port
TERMINAL ASSIGNMENT
,--~
CSi ~I
22
010
2
21
000
3
OIl ~4
001 5
20
19
18
012 --.-J6
17
002 17
16
DI3~15
003 9
14
C53
10
13
Yss II
12
-
"'DO
017
007
016
006
015
005
014
004
CLR
C52
TOP VIEW
92CS-33010
CDP1875C Output Port
TERMINAL ASSIGNMENT
File Number 1255
________________________________________________ 425

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