Description
ISSI's 1Gb DDR2 SDRAM uses a double-data-rate architecture to achieve high-speed operation.
The double-data rate architecture is essentially a 4n-prefetch architecture, with an interface designed to transfer two data words per clock cycle at the I/O balls.
Features
- Standard Voltage: Vdd and Vddq = 1.8V ±0.1V.
- Low Voltage (L): Vdd and Vddq = 1.5V ±0.075V.
- SSTL_18-compatible for Standard Voltage.
- SSTL_15-compatible for Low Voltage.
- Double data rate interface: two data transfers per clock
cycle.
- Differential data strobe (DQS, DQS).
- 4-bit prefetch architecture.
- On chip DLL to align DQ and DQS transitions with CK.
- 8 internal banks for concurrent operation.
- Programmable CA.
IS46DR16640D Datasheet
