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64-Macrocell MAX® EPLD
CY7C343
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
, CA 95134
•
408-943-2600
Document #: 38-03015 Rev. *B
Revised April 22, 2004
Features
•64 MAX® macrocells in four LABs
• Eightdedicated inputs, 24 bidirectional I/O pins
• Programmable interconnect array
• 0.8-micron double-metal CMOS EPROM technology
• Available in 44-pin HLCC, PLCC
• Lowest power MAX device
Functional Description
The CY7C343 is a high-performance, high-density erasable
programmable logic device, available in 44-pin PLCC and
HLCC packages.
The CY7C343 contains 64 highly flexible macrocells and 128
expander product terms. These resources are divided into four
Logic Array Blocks (LABs) connected through the Program-
mable Inter-connect Array (PIA). There are eight input pins,
one that doubles as a clock pin when needed. The CY7C343
also has 28 I/O pins, each connected to a macrocell (six for
LABs A and C, and eight for LABs B and D). The remaining 36
macrocells are used for embedded logic.
The CY7C343 is excellent for a wide range of both
synchronous and asynchronous applications.
MACROCELL 17
MACROCELL 18
MACROCELL 19
MACROCELL 20
MACROCELL 21
MACROCELL 22
MACROCELL 23
MACROCELL 24
MACROCELL 38
MACROCELL 37
MACROCELL 36
MACROCELL 35
MACROCELL 34
MACROCELL 33
9 INPUT
11 INPUT
12 INPUT
13 INPUT
P
I
A
MACROCELL 1
MACROCELL 2
MACROCELL 3
MACROCELL 4
MACROCELL 5
MACROCELL 6
MACROCELL 56
MACROCELL 55
MACROCELL 54
MACROCELL 53
MACROCELL 52
MACROCELL 51
MACROCELL 50
MACROCELL 49
MACROCELLS 7–16
MACROCELLS 57–64
MACROCELLS 25–32
MACROCELLS 39–48
INPUT 35
INPUT/CLK 34
INPUT 33
INPUT 31
2
4
5
6
7
8
1
44
42
41
40
39
38
37
30
29
28
27
26
24
SYSTEM CLOCK
(3, 14, 25, 36)
(10, 21, 32, 43)
VCC
GND
LAB A
LAB B
LAB D
LAB C
Logic Block Diagram
DEDICATED
INPUTS
I/O PINS
15
16
17
18
19
20
22
23
I/O PINS
I/O PINS
I/O PINS
Selection Guide
7C343-20
7C343-25
7C343-30
7C343-35
Unit
Maximum Access Time
20
25
30
35
ns
Maximum Operating Current
Commercial
135
135
135
135
mA
Military
225
225
225
225
Industrial
225
225
225
225
Maximum Standby Current
Commercial
125
125
125
125
mA
Military
200
200
200
200
Industrial
200
200
200
200
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