USE ULTRA37000TM FOR
ALL NEW DESIGNS
CY7C344
32-Macrocell MAX® EPLD
Features
densest EPLD of this size. Eight dedicated inputs and 16
bidirectional I/O pins communicate to one logic array block. In
the CY7C344 LAB there are 32 macrocells and 64 expander
product terms. When an I/O macrocell is used as an input, two
expanders are used to create an input path. Even if all of the
I/O pins are driven by macrocell registers, there are still 16
“buried” registers available. All inputs, macrocells, and I/O pins
are interconnected within the LAB.
• High-performance, high-density replacement for TTL,
74HC, and custom logic
• 32 macrocells, 64 expander product terms in one LAB
• 8 dedicated inputs, 16 I/O pins
• 0.8-micron double-metal CMOS EPROM technology
The speed and density of the CY7C344 makes it a natural for
all types of applications. With just this one device, the designer
can implement complex state machines, registered logic, and
combinatorial “glue” logic, without using multiple chips. This
architectural flexibility allows the CY7C344 to replace
multichip TTL solutions, whether they are synchronous,
asynchronous, combinatorial, or all three.
• 28-pin, 300-mil DIP, cerDIP or 28-pin HLCC, PLCC
package
Functional Description
Available in a 28-pin, 300-mil DIP or windowed J-leaded
ceramic chip carrier (HLCC), the CY7C344 represents the
Logic Block Diagram [1]
Pin Configurations
HLCC
Top View
15(22)
INPUT
INPUT
15(23)
INPUT
INPUT/CLK 2(9)
27(6)
INPUT
INPUT
13(20)
28(7)
INPUT
INPUT
14(21)
MACROCELL 8
MACROCELL 10
MACROCELL 12
MACROCELL 14
MACROCELL 16
3(10)
I/O
4(11)
MACROCELL 5
I
I/O
5(12)
MACROCELL 7
O
I/O
6(13)
MACROCELL 3
G
L
O
I/O
9(16)
C
O
I/O
B
A
I/O
11(18)
N
T
I/O
12(19)
I/O
17(24)
R
I/O
18(25)
O
L
MACROCELL 11
MACROCELL 13
L
MACROCELL 15
B
MACROCELL 17
MACROCELL 20
U
S
MACROCELL 19
MACROCELL 21
I/O
19(26)
I/O
20(27)
MACROCELL 24
MACROCELL 23
MACROCELL 26
MACROCELL 25
I/O
I/O
I/O
INPUT
INPUT
INPUT
INPUT
I/O
MACROCELL 27
I/O
MACROCELL 29
I/O
25(4)
MACROCELL 32
MACROCELL 31
I/O
INPUT
INPUT/CLK
I/O
I/O
I/O
I/O
VCC
GND
I/O
I/O
I/O
I/O
INPUT
INPUT
24(3)
MACROCELL 30
12 13 14 1516 1718
CerDIP
Top View
23(2)
MACROCELL 28
26(5)
64 EXPANDER PRODUCT TERM ARRAY
25
24
23
22
21
20
19
10(17)
MACROCELL 9
MACROCELL 18
MACROCELL 22
I/O
I/O
I/O
VCC
GND
I/O
I/O
I/O
I/O
MACROCELL 6
MACROCELL 1
5
6
7
8
9
10
11
V
CC
GND
I/O
I/O
MACROCELL 4
4 3 2 1 28 27 26
I/O
INPUT
INPUT
INPUT
INPUT/CLK
I/O
I/O
I/O
I/O
MACROCELL 2
1(8)
32
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
INPUT
INPUT
I/O
I/O
I/O
I/O
VCC
GND
I/O
I/O
I/O
I/O
INPUT
INPUT
Selection Guide
7C344-15
Maximum Access Time
Maximum Operating Current
7C344-20
7C344-25
15
Commercial
20
25
ns
200
200
200
mA
Military
220
220
Industrial
Maximum Standby Current
Unit
220
220
220
Commercial
150
150
150
170
170
170
170
Military
Industrial
170
mA
Note:
1. Numbers in () refer to J-leaded packages.
Cypress Semiconductor Corporation
Document #: 38-03006 Rev. *B
•
3901 North First Street
•
San Jose, CA 95134
•
408-943-2600
Revised June 6, 2005
