Memory Module Specification KVR266X72RC25/256 Registered DDR266 SDRAM 184-Pin ECC Dual In-Line Memory Module (DIMM) DESCRIPTION: This document describes ValueRAM's 32M x 72-bit (256MB), CAS Latency 2.5 SDRAM (Synchronous DRAM) Registered DDR266 ECC memory module. The components on this module include eighteen 16M x 8-bit (4M x 8-bit x 4 Bank / 133MHz, 7.5ns, CL2.5 components) SDRAM in TSOP packages and three 16-bit drivers in TSSOP packages. This 184-pin DIMM uses gold contact fingers and requires +2.5V. The electrical and mechanical specifications are as follows: FEATURES: Clock Cycle Time (tCK) Row Cycle Time (tRC) Refresh Row Cycle Time (tRFC) Row Active Time (tRAS) Single Power Supply of Power UL Rating
7.5ns (min.) / 15ns (max.) 65ns (min.) 75ns (min.) 45ns (min.) / 12,000ns (max.) +2.5V (+/- .25V) 4.200 W (operating) 94 V - 0
Units : Inches (Millimeters)
1.700
(31.75) (17.80) 0.700 0.393 (10.00)
0.250 (6.350)
0.157 (4.00) 0.1496 (3.80)
2.175
0.071 (1.80)
0.100
0.26 (6.62)
(2.50 )
2.886 (73.30)
5.250 (133.35)
1
0.000 (00.00)
0.000 (00.00)
0.118 (3.00)
0.039 ± 0.002 (1.000 ± 0.050) 0.0787 (2.00) 0.0078 ±0.006 (0.20 ±0.15) 0.050 (1.270)
0.1575 (4.00)
Figure 1: KVR266X72RC25/256 184-Pin DDR SDRAM Module Part No. VALUERAM0037-001.B00
01/09/01