AS4C2M32S 2M x 32 bit Synchronous DRAM (SDRAM) Confidential Advanced (Rev. 3.0, Dec. /2012) Features Overview Fast access time: 5.4/5.4 ns The 64Mb SDRAM is a high-speed CMOS synchronous DRAM containing 64 Mbits. It is Fast Clock rate: 166/143 MHz internally configured as a quad 512K x 32 DRAM Fully synchronous operation with a synchronous interface (all signals are Internal pipelined architecture registered on the positive edge of the clock signal, Four internal banks (512K x 32bit x 4bank) CLK). Each of the 512K x 32 bit banks is organized Programmable Mode as 2048 rows by 256 columns by 32 bits. Read and - CAS Latency: 2 or 3 write accesses to the SDRAM are burst oriented - Burst Length: 1, 2, 4, 8, or full page accesses start at a selected location and continue for a programmed number of locations in a programmed - Burst Type: Sequential or Interleaved sequence. Accesses begin with the registration of a - Burst-Read-Single-Write BankActivate command which is then followed by a Burst stop function Read or Write command. Individual byte controlled by DQM0-3 The SDRAM provides for programmable Read Auto Refresh and Self Refresh or Write burst lengths of 1, 2, 4, 8, or full page, with a Operating temperature range burst termination option. An auto precharge function - Commercial (0 ~ 70C) may be enabled to provide a self-timed row - Industrial (-40 ~ 85C) precharge that is initiated at the end of the burst 4096 refresh cycles/64ms sequence. The refresh functions, either Auto or Self Refresh are easy to use. Single +3.3V 0.3V power supply Interface: LVTTL By having a programmable mode register, the system can choose the most suitable modes to 90-ball 8 x 13 x 1.2mm TFBGA package maximize its performance. These devices are well - Pb and Halogen Free suited for applications requiring high memory bandwidth. Table 1. Key Specifications AS4C2M32S -6/7 Clock Cycle time(min.) 6/7 ns tCK3 tAC3 Access time from CLK (max.) 5.4/5.4 ns tRAS Row Active time(min.) 42/42 ns tRC Row Cycle time(min.) 60/63 ns Table 2.Ordering Information Part Number Frequency Package Temperature Temp Range AS4C2M32S-6BIN 166MHz 90-ball TFBGA Industrial -40 ~ 85C AS4C2M32S-7BCN 143MHz 90-ball TFBGA Commercial 0 ~ 70C B: indicates 90-ball (8 x 13 x 1.2mm) TFBGA package N: indicates Pb and Halogen Free Confidential 1 Rev. 3.0 Dec. /2012 AS4C2M32S Figure 1. Ball Assignment (Top View) 1 2 3 7 8 9 DQ26 DQ24 VSS VDD DQ23 DQ21 A DQ28 VDDQ VSSQ VDDQ VSSQ DQ19 B VSSQ DQ27 DQ25 DQ22 DQ20 VDDQ C VSSQ DQ29 DQ30 DQ17 DQ18 VDDQ D VDDQ DQ31 NC NC DQ16 VSSQ E VSS DQM3 A3 A2 DQM2 VDD F A4 A5 A6 A10 A0 A1 G A7 A8 NC NC BA1 NC H CLK CKE A9 BA0 CS RAS J DQM1 NC NC CAS WE DQM0 K VDDQ DQ8 VSS VDD DQ7 VSSQ L VSSQ DQ10 DQ9 DQ6 DQ5 VDDQ M VSSQ DQ12 DQ14 DQ1 DQ3 VDDQ N DQ11 VDDQ VSSQ VDDQ VSSQ DQ4 P DQ13 DQ15 VSS VDD DQ0 DQ2 R Confidential 2 Rev. 3.0 Dec. /2012