CDP1872C Datasheet, PDF (1/6 Pages) Intersil Corporation – High-Speed 8-Bit Input and Output Ports

CDP1872C,
CDP1874C, CDP1875C
March 1997
High-Speed 8-Bit Input and Output Ports
Features
Description
• Parallel 8-Bit Input/Output Register with Buffered Out-
puts
• High-Speed Data-In to Data-Out 85ns (Max) at V_DD = 5V
• Flexible Applications In Microprocessor Systems as
Buffers and Latches
• High Order Address-Latch Capability in CDP1800-
Series Microprocessor Systems
• Output Sink Current = 5mA (Min) at V_DD = 5V
• Three-State Output - CDP1872C and CDP1874C
Ordering Information
PART
NUMBER
CDP1872CE
CDP1874CE
CDP1875CE
TEMP. RANGE PACKAGE
-40^oC to +85^oC
-40^oC to +85^oC
-40^oC to +85^oC
PDIP
PDIP
PDIP
PKG.
NO.
E22.4
E22.4
E22.4
The CDP1872C, CDP1874C and CDP1875C devices are
high-speed 8-bit parallel input and output ports designed for
use in the CDP1800 microprocessor system and for general
use in other microprocessor systems. The CDP1872C and
CDP1874C are 8-bit input ports; the CDP1875C 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 CDP1874C has two active
high device selects. These devices also feature Three-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 times.
Pinouts
CDP1872C INPUT PORT
(PDIP)
TOP VIEW
CDP1874C INPUT PORT
(PDIP)
TOP VIEW
CDP1875C OUTPUT PORT
(PDIP)
TOP VIEW
CS1 ¹
DI0 ²
DO0 ³
DI1 4
D01 5
DI2 6
D02 7
DI3 8
D03 ⁹
CLOCK ¹⁰
V_SS ¹¹
22 _VDD
21 DI7
20 D07
19 DI6
18 D06
17 _DI5
16 D05
15 DI4
14 _D04
13 _CLR
12 _CS2
CS1 ¹
DI0 ²
DO0 ³
DI1 4
D01 5
DI2 6
D02 7
DI3 8
D03 ⁹
CLOCK ¹⁰
V_SS ¹¹
22 _VDD
21 DI7
20 D07
19 DI6
18 D06
17 _DI5
16 D05
15 DI4
14 _D04
13 _CLR
12 _CS2
CS1 ¹
DI0 ²
DO0 ³
DI1 4
D01 5
DI2 6
D02 7
DI3 8
D03 ⁹
CS3 ¹⁰
V_SS ¹¹
22 _VDD
21 DI7
20 D07
19 DI6
18 D06
17 _DI5
16 D05
15 DI4
14 _D04
13 _CLR
12 _CS2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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