Features: • Operates at 50 MHz
• Uses 64K x 18 / 128K x 18 or 256K x 18 high-performance synchronous SRAMs
• 144-Position Angled DIMM from Berg p/n 61178
• 3.3V inputs/data outputsPinout
Specifications(Above which the useful life may be impaired. For user guidelinesnot tested.)
Storage Temperature .................................... 55 to +125
Ambient Temperature
with Power Applied............................................ 0 to +70
3.3V Supply Voltage to Ground Potential........ 0.5V to +4.5V
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 mADescriptionThe CYM9270, CYM9271B, CYM9272A, and the CYM9273 are high-performance synchronous memory modules organized as 64K(9270), 128K(9271B), 256K(9272A), 512K(9273) by 36 bits. The CYM9270, CYM9271B, CYM9272A, and the CYM9273 are constructed using either 128K x 18 SRAMs (9270, 9271B, 9272A) or 256K x 18 SRAMs (9273) in plastic surface mount packages on an epoxy laminate board with pins. The CYM9270, CYM9271B, CYM9272A, and the CYM9273 are designed to be incorporated into large memory arrays.
The CYM9270, CYM9271B, CYM9272A, and the CYM9273 are configured as single banks or multiple banks depending on the SRAM used to make the module. Separate clock are provided for each of the banks. Separate clocks are provided for each of the SRAMs.
Multiple ground pins and on-board decoupling capacitors of CYM9270, CYM9271B, CYM9272A, and the CYM9273 ensure high performance with maximum noise immunity.
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 flash.
CYM9270 Data Sheet
