1CYM74C430
CYM74C430
Intel® 82430FX PCIset Level II
Cache Module
Features
Functional Description
This secondary cache module is designed for Intel P54C sys-
tems with the 82430FX (Triton) chip set. CYM74C430 is an
asynchronous 256-Kbyte cache module that provides a low-cost,
high-performance solution using 5V SRAMs with outputs clamped
to 3.3V.
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Pin-compatible secondary cache module family that ad-
heres to the Intel® COAST 1.2 specification
Asynchronous (CYM74C430) configuration with pres-
ence and configuration detect pins
Ideal for Intel P54C-based systems with the 82430FX
(Triton™) chipset
The CYM74C430 is organized as 32K by 64 data with an 8Kx8 tag
that supports 3-2-2-2 reads and 4-2-2-2 writes at 66 MHz.Multiple
ground pins and on-board decoupling capacitors ensure high
performance with maximum noise immunity.
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Operates at 50, 60, and 66 MHz
Uses cost-effective CMOS asynchronous SRAMs.
All components on the cache module are surface mounted on
a multi-layer epoxy laminate (FR-4) substrate. All inputs and
data outputs are (3.3V) TTL compatible. The contact pins of
the module are plated with 150 micro-inches of nickel covered
by 30 micro-inches of gold.
160-position Burndy DIMM CELP2X80SC3Z48 connec-
tor
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3.3V compatible inputs/data outputs
LogicBlockDiagram- CYM74C430
TWE
8Kx8
WE
PD4
GND NC
PD3
PD2
GND
PD1
PD0
GND NC
D
A
TIO[7:0]
CS
CE
OE
GND
5 V
ADDRESSLATCH
A[17:5]
D[7:0]
LA[17:5]
D[15:8]
D[23:16]
D[31:24]
CY7C1199
32K x 8
CALE
LE
FCT373C
D
D
D
A
D
CAA[4:3]
A
A
A
CE
OE
CE
OE
CE
OE
CE
OE
CWE
CWE
CWE
3
0
CWE
1
2
COE
CWE[3:0]
D[39:32]
D[47:40]
D[55:48]
D[63:56]
32K x 8
D
D
D
D
CAB[4:3]
A
A
A
A
CE
OE
CE
OE
CE
OE
CE
OE
CWE
4
CWE
CWE
CWE
7
5
6
CWE[7:4]
Intel is a registered trademark of Intel Corporation.
Triton is a trademark of Intel Corporation.
3901 North First Street San Jose CA 95134
Cypress Semiconductor Corporation
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408-943-2600
November 1995
