Description
The μPD44164095B is a 2,097,152-word by 9-bit and the μPD44164185B is a 1,048,576-word by 18-bit synchronous double data rate static RAM fabricated with advanced CMOS technology using full CMOS six-transistor memory cell.
The μPD44164095B and μPD44164185B integrate unique synchronous peripheral circuitry and a burst counter. All input registers controlled by an input clock pair (K and K#) are latched on the positive edge of K and K#. These products are suitable for application which require synchronous operation, high speed, low voltage, high density and wide bit configuration.
These products are packaged in 165-pin PLASTIC BGA.

FEATUREs
• 1.8 ± 0.1 V power supply
• 165-pin PLASTIC BGA (13 x 15)
• HSTL interface
• PLL circuitry for wide output data valid window and future frequency scaling
• Separate independent read and write data ports
• DDR read or write operation initiated each cycle
• Pipelined double data rate operation
• Separate data input/output bus
• Two-tick burst for low DDR transaction size
• Two input clocks (K and K#) for precise DDR timing at clock rising edges only
• Two output clocks (C and C#) for precise flight time and clock skew matching-clock and data delivered together to receiving device
• Internally self-timed write control
• Clock-stop capability. Normal operation is restored in 20 μs after clock is resumed.
• User programmable impedance output (35 to 70 Ω)
• Fast clock cycle time : 3.3 ns (300 MHz), 3.5 ns (287 MHz), 4.0 ns (250 MHz), 5.0 ns (200 MHz)
• Simple control logic for easy depth expansion
• JTAG 1149.1 compatible test access port