MT18VDDT12872AG Datasheet, PDF (5/29 Pages) Micron Technology – DDR SDRAM UNBUFFERED DIMM

256MB, 512MB, 1GB (x72, ECC, DR), PC3200
184-PIN DDR SDRAM UDIMM
Table 5: Pin Descriptions (Continued)
Pin numbers may not correlate with symbols; refer to Pin Assignment Tables on page 3 for more information
PIN NUMBERS
2, 4, 6, 8, 12, 13, 19, 20, 23,
24, 28, 31, 33, 35, 39, 40, 53,
55, 57, 60, 61, 64, 68, 69, 72,
73, 79, 80, 83, 84, 87, 88, 94,
95, 98, 99, 105, 106, 109,
110, 114, 117, 121, 123, 126,
127, 131, 133, 146, 147, 150,
151, 153, 155, 161, 162, 165,
166, 170, 171, 174, 175, 178,
179
92
181,182, 183
91
SYMBOL
DQ0–DQ63
SCL
SA0–SA2
SDA
1
15, 22, 30, 54, 62, 77, 96,
104, 112, 128, 136, 143, 156,
164, 172, 180
7, 38, 46, 70, 85, 108, 120,
148, 168
3, 11, 18, 26, 34, 42, 50, 58,
66, 74, 81, 89, 93, 100, 116,
124, 132, 139, 145, 152, 160,
176
184
9, 10, 71, 82, 90, 101, 102,
103, 113, 115 (256MB), 163,
167, 173
VREF
VDDQ
VDD
VSS
VDDSPD
NC
TYPE
Input/
Output
Data I/Os: Data bus.
DESCRIPTION
Input
Input
Input/
Output
Supply
Supply
Serial Clock for Presence-Detect: SCL is used to synchronize the
presence-detect data transfer to and from the module.
Presence-Detect Address Inputs: These pins are used to
configure the presence-detect device.
Serial Presence-Detect Data: SDA is a bidirectional pin used to
transfer addresses and data into and out of the presence-
detect portion of the module.
SSTL_2 reference voltage.
DQ Power Supply: +2.6V ±0.1V.
Supply Power Supply: +2.6V ±0.1V.
Supply Ground.
Supply Serial EEPROM positive power supply: +2.3V to +3.6V.
— No Connect: These pins should be left unconnected.
pdf: 09005aef80814e61, source: 09005aef80a43eed
DDA18C32_64_128x72AG.fm - Rev. E 9/04 EN
5
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©2004 Micron Technology, Inc.