Description
The CY7C148 and CY7C149 are high-performance CMOS static RAMs organized as 1024 by 4 bits.
2 A5 A6 V CC A7
INPUTBUFFER
A9 A8 A7 A6 A5 A4
A0 A1 A2
SENSE AMP
ROW DECODER
I/O0 I/O1 I/O2 I/O3 CS
CS GND
64 x 64 ARRAY
LCC Top View
2 1 1817 3 16 4 15 5 14 13 6 12 7 8 9 1011 CS GND WE I/0 3
COLUMN DECODER
POWER DO
Features
- Automatic power-down when deselected (7C148) CMOS for optimum speed/power 25-ns access time Low active power.
- 440 mW (commercial) sion is provided by an active LOW chip select (CS) input and three-state outputs. The CY7C148 remains in a low-power mode as long as the device remains unselected; i. e. , (CS) is HIGH, thus reducing the average power requirements of the device. The chip select (CS) of the CY7C149 does not affect the power dissipation of.
CY7C148_CypressSemiconductor.pdf