1CY7C346B
fax id: 6104
CY7C346
CY7C346B
128-Macrocell MAX® EPLDs
ture is 100% user configurable, allowing the devices to accom-
modate a variety of independent logic functions.
Features
• 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)
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 inter-
connect array, allowing all signals to be routed throughout the
chip.
• Available in 84-pin CLCC, PLCC, and 100-pin PGA,
PQFP
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 func-
tionality 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.
Functional Description
The CY7C346/CY7C346B is an Erasable Programmable Log-
ic Device (EPLD) in which CMOS EPROM cells are used to
configure logic functions within the device. The MAX architec-
Logic Block Diagram
INPUT [59] (N4)
INPUT [60] (M5)
INPUT [61] (N5)
INPUT [64] (N6)
INPUT [65] (M7)
INPUT [66] (L7)
INPUT [67] (N7)
INPUT [70] (L8)
INPUT [71] (N9)
INPUT [72] (M9)
.
.
.
.
.
.
.
.
.
.
36
37
38
41
42
43
44
47
48
49
.
1 (C7) [16] INPUT/CLK
..
.
78 (A10) [9] .....
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
.
79 (B9) [10] .....
80 (A9) [11] .....
83 (A8) [14] .....
84 (B7) [15] .....
.
.
..
..
..
..
2
5
6
7
(A7) [17] .....
(C6) [20] .....
(A5) [21] .....
(B5) [22] .....
SYSTEM CLOCK
LAB A
LAB H
MACROCELL 120
MACROCELL 119
MACROCELL 118
MACROCELL 117
MACROCELL 116
MACROCELL 115
MACROCELL 114
MACROCELL 113
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
MACROCELL
1
2
3
4
5
6
7
8
[100] (C13) NC
[99] (D12) NC
[98] (D13) 77
[97] (E12) 76
[96] (E13) 75
[95] (F11) 74
[92] (G13) 73
[91] (G11) 72
8 (B13) [1]
9 (C12) [2]
10 (A13) [3]
11 (B12) [4]
12 (A12) [5]
13 (11) [6]
NC (A11) [7]
NC (B10) [8]
MACROCELL 121–128
MACROCELL 9–16
LAB
B
LAB G
MACROCELL 104
MACROCELL 103
MACROCELL 102
MACROCELL 101
MACROCELL 100
MACROCELL 99
MACROCELL 98
MACROCELL 97
14 (A4) [23]
15 (B4) [24]
16 (A3) [25]
17 (A2) [26]
18 (B3) [27]
21 (A1) [28]
NC (B2) [29]
NC (B1) [30]
MACROCELL 17
MACROCELL 18
MACROCELL 19
MACROCELL 20
MACROCELL 21
MACROCELL 22
MACROCELL 23
MACROCELL 24
[90] (G12) NC
[89] (H13) NC
[86] (J13) 71
[85] (J12) 70
[84] (K13) 69
[83] (K12) 68
[82] (L13) 67
[81] (L12) 64
MACROCELL 105–112
MACROCELL 25–32
P
I
LAB C
A
LAB F
MACROCELL 33
MACROCELL 34
MACROCELL 35
MACROCELL 36
MACROCELL 37
MACROCELL 38
MACROCELL 39
MACROCELL 40
22 (C2) [31]
25 (C1) [32]
26 (D2) [33]
27 (D1) [34]
28 (E2) [35]
29 (E1) [36]
NC (F1) [39]
NC (G2)[40]
[80] (M13) NC
[79] (M12) NC
[78] (N13) 63
[77] (M11) 60
[76] (N12) 59
[75] (N11) 58
[74] (M10) 57
[73] (N10) 56
MACROCELL 88
MACROCELL 87
MACROCELL 86
MACROCELL 85
MACROCELL 84
MACROCELL 83
MACROCELL 82
MACROCELL 81
MACROCELL 41–48
MACROCELL 86–96
LAB D
LAB E
MACROCELL 49
MACROCELL 50
MACROCELL 51
MACROCELL 52
MACROCELL 53
MACROCELL 54
MACROCELL 55
MACROCELL 56
[58] (M4) NC
[57] (N3) NC
[56] (M3) 55
[55] (N2) 54
[54] (M2) 53
[53] (N1) 52
[52] (L2) 51
[51] (M1) 50
MACROCELL 72
MACROCELL 71
MACROCELL 70
MACROCELL 69
MACROCELL 68
MACROCELL 67
MACROCELL 66
MACROCELL 65
30 (G3) [41]
31 (G1) [42]
32 (H3) [45]
33 (J1) [46]
34 (J2) [47]
35 (K1) [48]
NC (K2) [49]
NC (L1) [50]
MACROCELL 73– 80
MACROCELL 57– 64
() – PERTAIN TO 100–PIN PGA PACKAGE
] –PERTAIN TO 100–PIN PQFP PACKAGE
3, 20, 37, 54 (A6,B6,F12,F13,H1,H2,M8,N8) [18, 19, 43, 44, 68, 69, 93, 94]
16, 33, 50, 67 (B8,C8,F2,F3,H11,H12,L6,M6) [12, 13, 37, 38, 62, 63, 87, 88]
V
CC
[
C346–1
GND
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
•
CA 95134
•
408-943-2600
October 1989 – Revised March 31, 1997
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