SAN CARLOS, Calif. — Mar. 10, 2014 — Alliance Memory today introduced a new line of high-speed CMOS double data rate 2 synchronous DRAMs (DDR2 SDRAM) with densities of 512 Mb (AS4C32M16D2) and 1 Gb (AS4C64M16D2, AS4C128M8D2) in 60-ball 8-mm by 10-mm by 1.2-mm and 84-ball 8-mm by 12.5-mm by 1.2-mm FBGA packages.
The devices released today provide reliable drop-in, pin-for-pin-compatible replacements for a number of similar solutions in automotive, industrial, consumer, and networking products requiring high memory bandwidth. The AS4C32M16D2 is internally configured as four banks of 8M words x 16 bits. The AS4C64M16D2 and AS4C128M8D2 are internally configured as eight banks of 8M x 16 bits and 16M x 8 bits, respectively. The DDR2 SDRAMs offer a synchronous interface, operate from a single + 1.8-V (± 0.1 V) power supply, and are lead (Pb)- and halogen-free.
The AS4C32M16D2, AS4C64M16D2, and AS4C128M8D2 feature a fast clock rate of 400 MHz and a data rate of 800 Mbps/pin, and they are offered in commercial (0 °C to +85 °C), industrial (-40 °C to + 95 °C), and automotive (-40 °C to +105 °C) temperature ranges. The DDR2 SDRAMs provide programmable read or write burst lengths of 4 or 8. An auto precharge function provides a self-timed row precharge initiated at the end of the burst sequence. Easy-to-use refresh functions include auto- or self-refresh while a programmable mode register allows the system to choose the most suitable modes to maximize performance.
| Part Number | Density | Configuration | Package | Temp. Range |
|---|---|---|---|---|
| AS4C32M16D2-25BCN | 512 Mb | 32M x 16 bit | 84-ball FBGA | 0° to +85 °C |
| AS4C32M16D2-25BIN | 512 Mb | 32M x 16 bit | 84-ball FBGA | -40 °C to +95 °C |
| AS4C32M16D2-25BAN | 512 Mb | 32M x 16 bit | 84-ball FBGA | -40 °C to +105 °C |
| AS4C64M16D2-25BCN | 1G | 64M x 16 bit | 84-ball FBGA | 0° to +85 °C |
| AS4C64M16D2-25BIN | 1G | 64M x 16 bit | 84-ball FBGA | -40 °C to +95 °C |
| AS4C64M16D2-25BAN | 1G | 64M x 16 bit | 84-ball FBGA | -40 °C to +105 °C |
| AS4C128M8D2-25BCN | 1G | 128M x 8 bit | 60-ball FBGA | 0° to +85 °C |
| AS4C128M8D2-25BIN | 1G | 128M x 8 bit | 60-ball FBGA | -40 °C to +95 °C |
| AS4C128M8D2-25BAN | 1G | 128M x 8 bit | 60-ball FBGA | -40 °C to +105 °C |
Samples of the new DDR2 SDRAMs are available now, with lead times of six to eight weeks for production quantities. Pricing for U.S. delivery starts at $1.30 per piece.
