72Mb QUAD (Burst 4) SYNCHRONOUS SRAM
IS61QDB44M18A IS61QDB42M36A
4Mx18, 2Mx36 72Mb QUAD (Burst 4) SYNCHRONOUS SRAM
FEATURES
DESCRIPTION
AUGUST 2014
2Mx...
Description
IS61QDB44M18A IS61QDB42M36A
4Mx18, 2Mx36 72Mb QUAD (Burst 4) SYNCHRONOUS SRAM
FEATURES
DESCRIPTION
AUGUST 2014
2Mx36 and 4Mx18 configuration available.
On-chip Delay-Locked Loop (DLL) for wide data valid window.
Separate independent read and write ports with concurrent read and write operations.
Synchronous pipeline read with late write operation.
Double Data Rate (DDR) interface for read and write input ports.
1.5 cycle read latency.
Fixed 4-bit burst for read and write operations.
Clock stop support.
Two input clocks (K and K#) for address and control registering at rising edges only.
Two output clocks (C and C#) for data output control.
Two echo clocks (CQ and CQ#) that are delivered simultaneously with data.
+1.8V core power supply and 1.5, 1.8V VDDQ, used with 0.75, 0.9V VREF.
HSTL input and output interface.
Registered addresses, write and read controls, byte writes, data in, and data outputs.
Full data coherency.
Boundary scan using limited set of JTAG 1149.1 functions.
Byte write capability.
Fine ball grid array (FBGA) package: 13mmx15mm and 15mmx17mm body size 165-ball (11 x 15) array
Programmable impedance output drivers via 5x user-supplied precision resistor.
The 72Mb IS61QDB42M36A and IS61QDB44M18A are synchronous, high-performance CMOS static random access memory (SRAM) devices. These SRAMs have separate I/Os, eliminating the need for high-speed bus turnaround. The rising edge of K clock initiates the read/write operati...
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