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CDP1853D

Description
OTHER DECODER/DRIVER, TRUE OUTPUT, CDIP16
Categorysemiconductor    logic   
File Size34KB,6 Pages
ManufacturerIntersil ( Renesas )
Websitehttp://www.intersil.com/cda/home/
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CDP1853D Overview

OTHER DECODER/DRIVER, TRUE OUTPUT, CDIP16

CDP1853,
CDP1853C
March 1997
N-Bit 1 of 8 Decoder
Description
The CDP1853 and CDP1853C are 1 of 8 decoders designed for
use in general purpose microprocessor systems. These
devices, which are functionally identical, are specifically
designed for use as gated N-bit decoders and interface directly
with the 1800-series microprocessors without additional compo-
nents. The CDP1853 has a recommended operating voltage
range of 4V to 10.5V, and the CDP1853C has a recommended
operating voltage range of 4V to 6.5V.
When CHIP ENABLE (CE) is high, the selected output will be
true (high) from the trailing edge of CLOCK A (high-to-low tran-
sition) to the trailing edge of CLOCK B (high-to-low transition).
All outputs will be low when the device is not selected (CE = 0)
and during conditions of CLOCK A and CLOCK B as shown in
Figure 2. The CDP1853 inputs N0, N1, N2, CLOCK A, and
CLOCK B are connected to an 1800-series microprocessor out-
puts N0, N1, N2, TPA, and TPB respectively, when used to
decode I/O commands as shown in Figure 5. The CHIP
ENABLE (CE) input provides the capability for multiple levels of
decoding as shown in Figure 6.
The CDP1853 can also be used as a general 1 of 8 decoder for
I/O and memory system applications as shown in Figure 4.
The CDP1853 and CDP1853C are supplied in hermetic 16-lead
dual-in-line ceramic (D suffix) and plastic (E suffix) packages.
Features
• Provides Direct Control of Up to 7 Input and 7 Output
Devices
• CHIP ENABLE (CE) Allows Easy Expansion for Multi-
level I/O Systems
Ordering Information
PACKAGE TEMP. RANGE
PDIP
Burn-In
SBDIP
Burn-In
5V
10V
PKG.
NO.
-40
o
C to +85
o
C CDP1853CE
CDP1853CEX
CDP1853E E16.3
-
E16.3
-40
o
C to +85
o
C CDP1853CD CDP1853D D16.3
CDP1853CDX
-
D16.3
Pinout
16 LEAD DIP
TOP VIEW
CLK A 1
N0 2
N1 3
OUT 0 4
OUT 1 5
OUT 2 6
OUT 3 7
V
SS
8
16 V
DD
15 CLK B
14 N2
13 CE
12 OUT 4
11 OUT 5
10 OUT 6
9 OUT 7
CDP1853 Functional Diagram
CE
4
N0
2
5
6
N1
3
1 OF 8
DECODER
7
12
11
10
EN
CE
13
9
OUT 0
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
TRUTH TABLE
CL A
0
0
1
1
X
CL B
0
1
0
1
X
EN
Qn-1†
1
0
1
0
1
1
1
1
0
N2
14
N2
0
N1
0
0
1
1
0
0
1
1
X
N0
0
1
0
1
0
1
0
1
X
EN
1
1
1
1
1
1
1
1
0
0 1 2 3 4 5 6 7
1 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0
0 0 1 0 0 0 0 0
0 0 0 1 0 0 0 0
0 0 0 0 1 0 0 0
0 0 0 0 0 1 0 0
0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
1
CLOCK
A
(TPA)
Qn
0
0
0
15
CLOCK
B
(TPB)
1
1
1
1
FIGURE 1.
X
1 = High level, 0 = Low level, X = Don’t care
Qn-1 = Enable remains in previous state.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
©
Intersil Corporation 1999
File Number
1189.2
4-35

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