fax id: 6104
1CY 7C34 6B
CY7C346
CY7C346B
128-Macrocell MAX® EPLDs
Features
ture is 100% user configurable, allowing the devices to accommodate a variety of independent logic functions.
•
•
•
•
128 macrocells in 8 LABs
20 dedicated inputs, up to 64 bidirectional I/O pins
Programmable interconnect array
0.8-micron double-metal CMOS EPROM technology
(CY7C346)
• Advanced 0.65-micron CMOS technology to increase
performance (CY7C346B)
• Available in 84-pin CLCC, PLCC, and 100-pin PGA,
PQFP
The 128 macrocells in the CY7C346/CY7C346B are divided
into 8 Logic Array Blocks (LABs), 16 per LAB. There are 256
expander product terms, 32 per LAB, to be used and shared
by the macrocells within each LAB.
Each LAB is interconnected through the programmable interconnect array, allowing all signals to be routed throughout the
chip.
Functional Description
The CY7C346/CY7C346B is an Erasable Programmable Logic Device (EPLD) in which CMOS EPROM cells are used to
configure logic functions within the device. The MAX architec-
The speed and density of the CY7C346/CY7C346B allow it to
be used in a wide range of applications, from replacement of
large amounts of 7400-series TTL logic, to complex controllers
and multifunction chips. With greater than 25 times the functionality of 20-pin PLDs, the CY7C346/CY7C346B allows the
replacement of over 50 TTL devices. By replacing large
amounts of logic, the CY7C346/CY7C346B reduces board
space, part count, and increases system reliability.
Logic Block Diagram
.. 1
. 78
. 79
80
. 83
. 84
.. 2
.. 5
.. 6
.. 7
(C7) [16]
(A10) [9]
(B9) [10]
(A9) [11]
(A8) [14]
(B7) [15]
(A7) [17]
(C6) [20]
(A5) [21]
(B5) [22]
INPUT [59]
INPUT [60]
INPUT [61]
INPUT [64]
INPUT [65]
INPUT [66]
INPUT [67]
INPUT [70]
INPUT [71]
INPUT [72]
. INPUT/CLK
.....
INPUT
.....
INPUT
.....
INPUT
.....
INPUT
.....
INPUT
.....
INPUT
.....
INPUT
.....
INPUT
.....
INPUT
(N4)
(M5)
(N5)
(N6)
(M7)
(L7)
(N7)
(L8)
(N9)
(M9)
.
.
.
.
.
.
.
.
.
.
36
37
38
41
42
43
44
47
48
49
SYSTEM CLOCK
8 (B13) [1]
9 (C12) [2]
10 (A13) [3]
11 (B12) [4]
12 (A12) [5]
13 (11) [6]
NC (A11) [7]
NC (B10) [8]
LAB A
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
LAB H
MACROCELL 120
MACROCELL 119
MACROCELL 118
MACROCELL 117
MACROCELL 116
MACROCELL 115
MACROCELL 114
MACROCELL 113
1
2
3
4
5
6
7
8
MACROCELL 121–128
MACROCELL 9–16
14 (A4)
15 (B4)
16 (A3)
17 (A2)
18 (B3)
21 (A1)
NC (B2)
NC (B1)
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
LAB B
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
LAB G
MACROCELL 104
MACROCELL 103
MACROCELL 102
MACROCELL 101
MACROCELL 100
MACROCELL 99
MACROCELL 98
MACROCELL 97
17
18
19
20
21
22
23
24
MACROCELL 25–32
22 (C2) [31]
25 (C1) [32]
26 (D2) [33]
27 (D1) [34]
28 (E2) [35]
29 (E1) [36]
NC (F1) [39]
NC (G2) [40]
LAB C
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
LAB F
MACROCELL 88
MACROCELL 87
MACROCELL 86
MACROCELL 85
MACROCELL 84
MACROCELL 83
MACROCELL 82
MACROCELL 81
MACROCELL 86–96
33
34
35
36
37
38
39
40
LAB D
(G12) NC
(H13) NC
(J13) 71
(J12) 70
(K13) 69
(K12) 68
(L13) 67
(L12) 64
[80]
[79]
[78]
[77]
[76]
[75]
[74]
[73]
(M13)
(M12)
(N13)
(M11)
(N12)
(N11)
(M10)
(N10)
[58]
[57]
[56]
[55]
[54]
[53]
[52]
[51]
(M4) NC
(N3) NC
(M3) 55
(N2) 54
(M2) 53
(N1) 52
(L2) 51
(M1) 50
NC
NC
63
60
59
58
57
56
LAB E
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
49
50
51
52
53
54
55
56
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
[18, 19, 43, 44, 68, 69, 93, 94]
VCC
16, 33, 50, 67 (B8,C8,F2,F3,H11,H12,L6,M6)
[12, 13, 37, 38, 62, 63, 87, 88]
GND
•
72
71
70
69
68
67
66
65
MACROCELL 73– 80
MACROCELL 57– 64
3, 20, 37, 54 (A6,B6,F12,F13,H1,H2,M8,N8)
Cypress Semiconductor Corporation
[90]
[89]
[86]
[85]
[84]
[83]
[82]
[81]
MACROCELL 105–112
P
I
A
MACROCELL 41–48
30 (G3) [41]
31 (G1) [42]
32 (H3) [45]
33 (J1) [46]
34 (J2) [47]
35 (K1) [48]
NC (K2) [49]
NC (L1) [50]
[100] (C13) NC
[99] (D12) NC
[98] (D13) 77
[97] (E12) 76
[96] (E13) 75
[95] (F11) 74
[92] (G13) 73
[91] (G11) 72
3901 North First Street
() – PERTAIN TO 100–PIN PGA PACKAGE
[ ] – PERTAIN TO 100–PIN PQFP PACKAGE
•
C346–1
San Jose
• CA 95134 •
408-943-2600
October 1989 – Revised March 31, 1997
