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1CY M74 C4 30
CYM74C430
Intel(R) 82430FX PCIset Level II Cache Module
Features
* Pin-compatible secondary cache module family that ad-
Functional Description
This secondary cache module is designed for Intel P54C systems 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. 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. 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.
heres to the Intel(R) COAST 1.2 specification
* Asynchronous (CYM74C430) configuration with pres-
ence and configuration detect pins
* Ideal for Intel P54C-based systems with the 82430FX
(TritonTM) chipset
* Operates at 50, 60, and 66 MHz * Uses cost-effective CMOS asynchronous SRAMs. * 160-position Burndy DIMM CELP2X80SC3Z48 connec-
tor
* 3.3V compatible inputs/data outputs
Logic Block Diagram - CYM74C430
8Kx8 TWE CS GND WE AD CE OE 5V PD4 GND PD3 NC PD2 GND PD1 GND PD0 NC
TIO[7:0]
A[17:5]
ADDRESSLATCH LA[17:5] D[7:0] D[15:8] D[23:16] D[31:24] D A CE OE CWE1 A CE OE CWE2 D A CE OE CWE3 D
CALE
LE
FCT373C
CY7C1199 32K x 8 D
CAA[4:3]
A CE OE CWE0 COE CWE[3:0]
32K x 8 D A CE OE CWE4 A CE OE CWE5 D A CE OE CWE6 D A CE OE CWE7 D
D[39:32] D[47:40] D[55:48] D[63:56]
CAB[4:3]
CWE[7:4]
Intel is a registered trademark of Intel Corporation. Cypress Semiconductor Corporation *
Triton is a trademark of Intel Corporation. * San Jose * CA 95134 * 408-943-2600 November 1995
3901 North First Street
CYM74C430
Pin Configuration
Dual Read-Out SIMM (DIMM) Top View
GND TIO1 TIO7 TIO5 TIO3 RSVD VCC RSVD CAA4 GND COE CWE5 CWE7 CWE1 VCC CWE3 CAB3 CALE GND RSVD A4 A6 A8 A10 VCC A17 GND A9 A14 A15 RSVD PD0 PD2 PD4 GND NC GND D63 VCC D61 D59 D57 GND D55 D53 D51 D49 GND D47 D45 D43 VCC D41 D39 D37 GND D35 D33 D31 VCC D29 D27 D25 GND D23 D21 D19 VCC D17 D15 D13 GND D11 D9 D7 VCC D5 D3 D1 GND 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 GND TIO0 TIO2 TIO6 TIO4 RSVD NC TWE CAA3 GND CWE4 CWE6 CWE0 CWE2 NC CAB4 NC (GWE) NC (BWE) GND A3 A7 A5 A11 A16 NC A18 GND A12 A13 NC CS NC (ECS2) PD1 PD3 GND NC GND D62 NC D60 D58 D56 GND D54 D52 D50 D48 GND D46 D44 D42 NC D40 D38 D36 GND D34 D32 D30 NC D28 D26 D24 GND D22 D20 D18 NC D16 D14 D12 GND D10 D8 D6 NC D4 D2 D0 GND
2
CYM74C430
Pin Definitions
Signal Name VCC GND A[18:3] CAA[4:3] CAB[4:3] CS COE CWE[7:0] CALE PD0-PD 4 D[63:0] TIO[7:0] TWE NC RSVD 5V Supply Ground Addresses from processor Lower two address bits for bank 0 Lower two address bits for bank 1 Chip Select Output Enable Byte Write Enables Latch Enable Presence Detect output pins Data lines from processor Tag data bits Tag Write Enable signal Signal not connected on module Reserved Description
Presence Detect Pins
MODULE CYM74C430 PD4 GND PD3 NC PD2 GND PD1 GND PD0 NC
Selection Guide
CYM74C430-50 Cache Size System Clock (MHz) RAM Type Data RAM tAA Tag RAM tAA 256 KB 50 20 ns 30 ns 60 17 ns 20 ns 66 15 ns 15 ns Asynchronous 5V with outputs clamped to 3.3V CYM74C430-60 CYM74C430-65
3
CYM74C430
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ................................. -55C to +125C Ambient Temperature with Power Applied ........................................ -0C to +70C 5V Supply Voltage to Ground Potential....... -0.5V to +5.25V DC Voltage Applied to Outputs in High Z State .............................................. -0.5V to +4.6V DC Input Voltage ........................................... -0.5V to +4.6V Output Current into Outputs (LOW)............................. 20 mA
Operating Range
Range Commercial Ambient Temperature 0C to +70C VCC 5V 5%
Electrical Characteristics Over the Operating Range
Parameter VIH VIL VOH VOL ICC Description Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Output LOW Voltage VCC Operating Supply Current VCC=Min. IOH = -4 mA VCC=Min. IOL = 8 mA VCC=Max., IOUT=0 mA, f=fMAX=1/tRC Test Condition Min. 2.2 -0.5 2.4 0.4 1600 Max. VCC + 0.3 0.8 Unit V V V V mA
Ordering Information
Speed (MHz) 50 60 66 Ordering Code CYM74C430PM-50C CYM74C430PM-60C CYM74C430PM-66C Package Name PM37 PM37 PM37 Package Type 160-Pin Dual-Readout SIMM 160-Pin Dual-Readout SIMM 160-Pin Dual-Readout SIMM Description Async 256 KB Async 256 KB Async 256 KB Operating Range Commercial Commercial Commercial
Document #: 38-M-00078
Package Diagram
160-Pin Dual-Readout SIMM PM37
(c) Cypress Semiconductor Corporation, 1995. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.

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