Description
The R1Q2A7236 is a 2,097,152-word by 36-bit, the R1Q2A7218 is a 4,194,304-word by 18-bit, and the
R1Q2A7209 is a 8,388,608-word by 9-bit synchronous quad data rate static RAM fabricated with advanced
CMOS technology using full CMOS six-transistor memory cell. It integrates unique synchronous peripheral
circuitry and a burst counter. All input registers are controlled by an input clock pair (K and /K) and are latched
on the positive edge of K and /K. These products are suitable for applications which require synchronous
operation, high speed, low voltage, high density and wide bit configuration. These products are packaged in
165-pin plastic FBGA package.
Features
႑ Power Supply
• 1.8 V for core (VDD), 1.4 V to VDD for I/O (VDDQ)
႑ Clock
• Fast clock cycle time for high bandwidth
• Two input clocks (K and /K) for precise DDR timing at clock rising edges only
• Two input clocks for output data (C and /C) to minimize clock skew and flight time mismatches
• Two output echo clocks (CQ and /CQ) simplify data capture in high-speed systems
• Clock-stop capability with μs restart
႑ I/O
• Separate independent read and write data ports with concurrent transactions
• 100% bus utilization DDR read and write operation
• HSTL I/O
• User programmable output impedance
• DLL/PLL circuitry for wide output data valid window and future frequency scaling
႑ Function
• Two-tick burst for low DDR transaction size
• Internally self-timed write control
• Simple control logic for easy depth expansion
• JTAG 1149.1 compatible test access port
႑ Package
• 165 FBGA package (15 x 17 x 1.4 mm)