UPD44646187AF5-E25-FQ1-A中文資料瑞薩數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

Features

? 1.8 ± 0.1 V power supply

? 165-pin PLASTIC BGA (15 x 17)

? HSTL interface

? DLL/PLL circuitry for wide output data valid window and future frequency scaling

? 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 Echo clocks (CQ and CQ#)

? Data Valid pin (QVLD) supported

? Read latency : 2.5 clock cycles (Not selectable by user)

? 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 : 2.0 ns (500 MHz) for 2.5 clock cycles read latency

? Simple control logic for easy depth expansion

? JTAG 1149.1 compatible test access port

? On-Die Termination (ODT) for better signal quality (Selectable ON/OFF by user)