AS4C8M16SB Revision History 8M x 16 SDRAM 54-PIN TSOP Package Revision Details Date Rev 1.0 Initial Release Apr. 2021 Confidential - 155 - Rev.1.0 Apr. 2021AS4C8M16SB 8M x 16 bit Synchronous DRAM (SDRAM) (Rev. 1.0, Apr. /2021) Features Overview Fast access time from clock: 5 ns The AS4C8M16SB SDRAM is a high-speed CMOS synchronous DRAM containing 128 Mbits. It Fast clock rate: 166 MHz is internally configured as 4 Banks of 2M word x 16 Fully synchronous operation DRAM with a synchronous interface (all signals are Internal pipelined architecture registered on the positive edge of the clock signal, 2M word x 16-bit x 4-bank CLK). Read and write accesses to the SDRAM are Programmable Mode registers burst oriented accesses start at a selected location - CAS Latency: 2 or 3 and continue for a programmed number of locations - Burst Length: 1, 2, 4, 8, or full page in a programmed sequence. Accesses begin with - Burst Type: Sequential or Interleaved the registration of a BankActivate command which is then followed by a Read or Write command. - Burst stop function The AS4C8M16SB provides for programmable Auto Refresh and Self Refresh Read or Write burst lengths of 1, 2, 4, 8, or full page, 4096 refresh cycles/64ms with a burst termination option. An auto precharge CKE power down mode function may be enabled to provide a self-timed row Single +3.3V 0.3V power supply precharge that is initiated at the end of the burst Operating temperature: T = -40 ~ 85C (Industrial) A sequence. The refresh functions, either Auto or Self Interface: LVTTL Refresh are easy to use. By having a programmable Package: Pb free and Halogen free mode register, the system can choose the most - 54-pin 400 mil plastic TSOP II suitable modes to maximize its performance. These devices are well suited for applications requiring high memory bandwidth and particularly well suited to high performance PC applications. Table 1. Key Specifications -6 Unit AS4C8M16SB-6TIN 6 ns Clock Cycle time(min.) tCK3 5 ns Access time from CLK (max.) tAC3 42 ns Row Active time(min.) tRAS 60 ns Row Cycle time(min.) tRC Table 2. Ordering Information Package Temperature Temp Range Part Number Frequency AS4C8M16SB-6TIN 166MHz 54 Pin TSOP II Industrial -40C to 85C Confidential - 255 - Rev.1.0 Apr. 2021