| Density | 72M |
|---|---|
| Org | 4Mx18 |
| Burst | 2 |
| Status | Prod |
| Speed Mhz | 450, 500, 550, 567 |
| Comments Previous Revision | 2.5 Cycle Read Latency, IS61DDPB24M18A/A1/A2 |
| Product Family | 61 = QUAD/P DDR-2/P |
| Configuration | 4M18 = 4M x18 |
| Package Code | B4 = 165 ball BGA (13 x 15 mm) |
| ROHS Version | = Leaded |
| Burst Type | B2 = Burst 2 |
| Die Rev | C = C |
| Read Latency (RL) | blank = 1.5 clock cycles or 2.5 clock cycles |
| ODT Option | 1 = ODT Option 1 If ODT = HIGH or floating, a high range termination resistance is selected. If ODT = LOW, a low range termination resistance is selected. |
| Product Type | DDP = DDR-IIP, Common I/O |
| Temperature Range | I = Industrial (-40°C to +85°C) |
| Speed | 500 = 500MHz |
The 72Mb IS61DDPB22M36C/C1/C2 and IS61DDPB24M18 C/C1/C2 are synchronous, high-performance CMOS static random access memory (SRAM) devices. These SRAMs have a common I/O bus. The rising edge of K clock initiates the read/write operation, and all internal opera- tions are self-timed. Refer to the Timing Reference Diagram for Truth Table for a description of the basic operations of these DDR-IIP (Burst of 2) CIO SRAMs. Read and write addresses are registered on alternating rising edges of the K clock. Reads and writes are performed in double data rate. Byte writes can change with the corresponding data-in to enable or disable writes on a per-byte basis. An internal write buffer enables the data-ins to be registered one cycle after the write address. The first data-in burst is clocked one cycle later than the write command signal, and the second burst is timed to the following rising edge of the K# clock. During the burst read operation, the data-outs from the first bursts are updated from output registers of the third rising edge of the K# clock (starting two and half cycles later after read command). The data-outs from the second burst are updated with the fourth rising edge of the K clock where read command receives at the first rising edge of K. The device is operated with a single +1.8V power supply and is compatible with HSTL I/O interfaces.