AS7C251MNTD18A
AS7C251MNTD18A is 2.5V 1M x 18 Pipelined SRAM manufactured by Alliance Semiconductor Corporation.
Features
- Organization: 1,048,576 words × 18 bits
- NTD™architecture for efficient bus operation
- Fast clock speeds to 166 MHz
- Fast clock to data access: 3.5/3.8 ns
- Fast OE access time: 3.5/3.8 ns
- Fully synchronous operation
- Asynchronous output enable control
- Available in 100-pin TQFP package ..
- Individual byte write and global write
- -
- -
- - Clock enable for operation hold Multiple chip enables for easy expansion 2.5V core power supply Self-timed write cycles Interleaved or linear burst modes Snooze mode for standby operation
Logic block diagram
A[19:0] 20 D
Address register burst logic
CLK CE0 CE1 CE2 R/W BWa BWb ADV / LD LBO ZZ
Q 20
Write delay addr. registers
Control logic
Write Buffer
1M x 18 SRAM array
DQ [a,b]
Data Q input register
18 18 18
18 CLK CEN CLK OE
Output register
18 OE
DQ [a,b]
Selection guide
-166 Minimum cycle time Maximum clock frequency Maximum clock access time Maximum operating current Maximum standby current Maximum CMOS standby current (DC)
12/23/04, v.2.2
-133 7.5 133 3.8 270 75...
