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1CY M74 P43 4B/4 35B
PRELIMINARY
CYM74P430B/431B CYM74P434B/435B
IntelTM 82430FX, HX, VX PCIset Pipelined L2 Cache Modules
Features
* Secondary cache modules that are ideal for the Intel 82430FX, 82430HX, and 82430VX chip sets * Complies with Intel COAST 3.0 cache module specifications * High-performance cache modules based on synchronous pipelined 32Kx32 data BSRAM * All modules contain series damping resistors on the data lines to improve system signal quality * Operates at 50, 60, and 66 MHz * 160-position connector is compatible with all four Keying Options defined in COAST 3.0. * 3.3V compatible inputs/data outputs The CYM74P430B/431B/434B/435B modules are based on industry standard 32Kx32 synchronous pipelined BSRAM. The CYM74P430B (256-Kbyte) and CYM74P431B (512-Kbyte) are high performance modules compatible with all three chipsets. The CYM74P434B (256-Kbyte) and CYM74P435B (512-Kbyte) are high performance modules with extended cacheability for systems based on the 82430HX chipset. Multiple ground pins and on-board decoupling capacitors ensure high performance with maximum noise immunity. All modules have series damping resistors on the data lines. All components on the cache modules are surface mounted on a multi-layer epoxy laminate (FR-4) substrate. The contact pins are plated with 150 micro-inches of nickel covered by 30 micro-inches of gold.
Functional Description
The cache modules are designed for Intel P54C/P55C systems with the 82430FX, 82430HX, and 82430VX chip sets.
Logic Block Diagram
Note:The tag rams are 8Kx8 for CYM74P430B/434B and 32Kx8 for CYM74P431B/435B WE CYM74P430B/434BA 17:3 CYM74P431B/435BA 18:3 A CE WE A CYM74P430B/434BECS 1 CYM74P431B/435BGND CLK1 CLK0 CK D31:0 A17:3 CWE7:0 ADSP ADSC ADV CCS COE GWE BWE CYM74P430B/434BECS 1 CYM74P431B/435BA 18 BOSEL VCC3 CWE3:0 A14:0 BW3:0 ADSP ADSC ADV CS1 OE GWE BWE CS2 MODE CS 2 32Kx32 CWE7:4 D31:0 A14:0 BW3:0 ADSP ADSC ADV CS1 OE GWE BWE CS2 MODE CS2 32Kx32 GND A18 CWE3:0 CK D31:0 D63:32 A14:0 BW3:0 ADSP ADSC ADV CS1 OE GWE BWE CS2 MODE CS2 32Kx32 CWE7:4 CK D31:0 D31:0 CE D7:0 D2:0 CYM74P430B/434B CYM74P431B/435B
PD3 NC GND
PD2 GND NC
[1]
PD1 NC GND
PD0 NC GND
Extended cache ability only CYM74P434B/435B
TIO10:8 ECS2 TIO7:0
TWE
CYM74P430B/434BECS 1 CYM74P431B/435BNC
CYM74P431B/435B ONLY
D63:0
CK D31:0 A14:0 BW3:0 ADSP ADSC ADV CS1 OE GWE BWE CS2 MODE CS2 32Kx32 D63:32
Note:All modules have series damping resistors on each data line between the SRAM and the module connector
Intel is a trademark of Intel Corporation. Cypress Semiconductor Corporation * 3901 North First Street * San Jose * CA 95134 * 408-943-2600 December 1995 - Revised June 1996
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Selection Guide
CYM74P430B/431B CYM74P434B/435B
Synchronous Pipelined Cache Modules Part Number Cache Size System Clock (MHz) Data SRAM tCO w/0 pF loading Tag SRAM tAA 50 13.5 ns 20 ns 74P430B-50 74P430B-60 256 KB 60 10 ns 15 ns 66 8.5 ns 15 ns 50 13.5 ns 20 ns 60 10 ns 15 ns 74P430B-66 74P431B-50 74P431B-60 512 KB 66 8.5 ns 15 ns 74P431B-66
Synchronous Pipelined Cache Modules with Extended Cacheability Part Number Cache Size System Clock (MHz) Data SRAM tCO w/0 pF loading Tag SRAM tAA 50 13.5 ns 20 ns 74P434B-50 74P434B-60 256 KB 60 10 ns 15 ns 66 8.5 ns 15 ns 50 13.5 ns 20 ns 60 10 ns 15 ns 74P434B-66 74P435B-50 74P435B-60 512 KB 66 8.5 ns 15 ns 74P435B-66
2
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Pin Configuration
Dual Read-Out SIMM (DIMM) Top View
GND TIO1 TIO7 TIO5 TIO [1] (CYM74P434B,CYM74P435B)TIO 3 9 VCC5 [1] (CYM74P434B,CYM74P435B)TIO 10 ADV GND COE CWE5 CWE7 CWE1 VCC5 CWE3 NC NC GND RSVD A4 A6 A8 A10 VCC5 A17 GND A9 A14 A15 RSVD PD0 PD2 [2] BOSEL GND CLK0 GND D63 VCC5 D61 D59 D57 GND D55 D53 D51 D49 GND D47 D45 D43 VCC5 D41 D39 D37 GND D35 D33 D31 VCC D29 D27 D25 GND D23 D21 D19 VCC5 D17 D15 D13 GND D11 D9 D7 VCC5 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
CYM74P430B/431B CYM74P434B/435B
GND TIO0 TIO2 TIO6 TIO4 [1] TIO8 (CYM74P434B, CYM74P435B) VCC3 TWE ADSC GND CWE4 CWE6 CWE0 CWE2 VCC3 CCS GWE BWE GND A3 A7 A5 A11 A16 VCC3 A18 (CYM74P431B,CYM74P435B) GND A12 A13 ADSP ECS1 ECS2 PD1 PD3 GND CLK1 (CYM74P431B,CYM74P435B) GND D62 VCC3 D60 D58 D56 GND D54 D52 D50 D48 GND D46 D44 D42 VCC3 D40 D38 D36 GND D34 D32 D30 VCC3 D28 D26 D24 GND D22 D20 D18 VCC3 D16 D14 D12 GND D10 D8 D6 VCC3 D4 D2 D0 GND
Notes: 1. For the CYM74P434B and CYM74P435B
TIO8 and TIO9 are pulled up on the module through a 8.2K resistor. TIO10 is pulled to ground on the module through an 8.2K resisitor.
2. BOSEL is pulled up through a 4.7K resistor on the module for backward compatible operation in systems not supporting BOSEL operation.
3
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Pin Definitions
Common Signals VCC5 VCC3 GND A18:3 COE CWE7:0 BWE GWE D63:0 TIO7:0 TIO10:8 TWE ADSP ADSC ADV CCS ECS1 ECS2 CLK1:0 PD3:0 BOSEL 5V Supply 3.3V Supply Ground Addresses from processor Output Enable Byte Write Selects Byte Write Enable Global Write Enable Data lines from processor Tag data bits Description
CYM74P430B/431B CYM74P434B/435B
Extended cacheability tag data bits for CYM74P434B or CYM74P435B Tag Write Enable signal Processor Address Strobe Cache Controller Address Strobe Burst Address Advance Cache Chip Select 256-Kbyte Expansion Chip Select input pin (CYM74P430B or CYM74P434B) 256-Kbyte Expansion Chip Select output pin (CYM74P430B or CYM74P434B) Clock signals, CLK1 is not used on CYM74P430B or CYM74P434B Presence Detect output pins Burst Order Select. When LOW, linear burst sequence is selected. When HIGH, interleaved burst sequence is selected. If not driven (a no-connect on the motherboard) a pull-up resistor on the module will default to interleaved burst sequence. Reserved. Signal not connected on module.
RSVD NC
Presence Detect Pins
PD3 CYM74P430B, CYM74P434B CYM74P431B, CYM74P435B NC GND PD2 GND NC PD1 NC GND PD0 NC GND
4
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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 3.3V Supply Voltage to Ground Potential....... -0.5V to +4.6V 5V Supply Voltage to Ground Potential.......... -0.5V to +7.0V
CYM74P430B/431B CYM74P434B/435B
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 0 to 70C VCC5 5V 5% VCC3 3.3V +10%-5%
Electrical Characteristics Over the Operating Range
Parameter VIH VIL VOH VOL ICC (74P430B) ICC (74P431B) ICC (74P434B) ICC (74P435B) Description Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Output LOW Voltage VCC Operating Supply Current VCC Operating Supply Current VCC Operating Supply Current VCC Operating Supply Current VCC=Min. IOH = -4 mA VCC=Min. IOL = 8 mA VCC=Max., IOUT=0 mA, f=fMAX VCC=Max., IOUT=0 mA, f=fMAX VCC=Max., IOUT=0 mA, f=fMAX VCC=Max., IOUT=0 mA, f=fMAX Test Condition Min. 2.0 -0.3 2.4 0.4 750 1400 900 1550 Max. VCC3 + 0.3 0.8 Unit V V V V mA mA mA mA
Ordering Information
Speed (MHz) 50 Ordering Code CYM74P430BPM-50C CYM74P431BPM-50C CYM74P434BPM-50C CYM74P435BPM-50C 60 CYM74P430BPM-60C CYM74P431BPM-60C CYM74P434BPM-60C CYM74P435BPM-60C 66 CYM74P430BPM-66C CYM74P431BPM-66C CYM74P434BPM-66C CYM74P435BPM-66C Document #: 38-M-00079 Package Name PM38 PM40 PM39 PM41 PM38 PM40 PM39 PM41 PM38 PM40 PM39 PM41 160-Pin Dual-Readout SIMM 160-Pin Dual-Readout SIMM Package Type 160-Pin Dual-Readout SIMM Description 256 KB 512 KB 256 KB extended cache 512 KB extended cache 256 KB 512 KB 256 KB extended cache 512 KB extended cache 256 KB 512 KB 256 KB extended cache 512 KB extended cache Commercial Commercial Operating Range Commercial
5
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Package Diagrams
CYM74P430B/431B CYM74P434B/435B
CYM74P430BPM in 160-pin Dual Readout SIMM PM38
CYM74P434BPM in 160-pin Dual Readout SIMM PM39
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Package Diagrams (continued)
CYM74P431BPM in 160-pin Dual Readout SIMM PM40
CYM74P430B/431B CYM74P434B/435B
*
CYM74P435BPM in 160-pin Dual Readout SIMM PM41
*
* The 512-KByte modules CYM74P431B and CYM74P435B have a 1.300 max. height vs. 1.140 for the 256-KB modules.
(c) Cypress Semiconductor Corporation, 1996. 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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