A-Data ADS6608A4A Synchronous DRAM 2M x 8 Bit x 4 Banks General Description Features The ADS6608A4A are four-bank Synchronous DRAMs organized as 2,097,152 words x 8 bits x 4 banks. Synchronous design allows precise cycle control with the use of system clock I/O transactions are possible on every clock cycle. Range of operating frequencies, programmable burst length and programmable latencies allow the same device to be useful for a variety of high bandwidth high performance memory system applications •JEDEC standard LVTTL 3.3V power supply •MRS Cycle with address key programs -CAS Latency (2 & 3) -Burst Length (1,2,4,8,& full page) -Burst Type (sequential & Interleave) •4 banks operation •All inputs are sampled at the positive edge of the system clock •Burst Read single write operation •Auto & Self refresh •4096 refresh cycle •DQM for masking •Package:54-pins 400 mil TSOP-Type II Ordering Information. Part No. Frequency Interface Package ADS6608A4A-75 133Mhz LVTTL 400mil 54pin TSOPII Pin Assignment VDD 1 54 Vss DQ0 2 53 DQ7 VDDQ 3 52 VssQ NC 4 51 NC DQ1 5 50 DQ6 VSSQ 6 49 VDDQ NC 7 48 NC DQ2 8 47 DQ5 VDDQ 9 46 VSSQ NC 10 45 NC DQ3 11 44 DQ4 VSSQ 12 43 VDDQ NC 13 42 NC VDD 14 41 VSS NC 15 40 NC/RFU /WE 16 39 DQM /CAS 17 38 CK /RAS 18 37 CKE /CS 19 36 NC BA0 20 35 A11 BA1 21 34 A9 A10/AP 22 33 A8 A0 23 32 A7 A1 24 31 A6 A2 25 30 A5 A3 26 29 A4 VDD 27 28 VSS 54-pin plastic TSOP II 400 mil Rev 1 April, 2001 1 A-Data ADS6608A4A Pin Description PIN NAME FUNCTION CK System Clock Active on the positive edge to sample all inputs. CKE Clock Enable Masks system clock to freeze operation from the next clock cycle. CKE should be enabled at least on cycle prior new command. Disable input buffers for power down in standby /CS Chip Select Disables or Enables device operation by masking or enabling all input except CK, CKE and L(U)DQM A0~A11 Address Row / Column address are multiplexed on the same pins. Row address : RA0~RA11 Column address : CA0~CA8 BA0~BA1 Banks Select Selects bank to be activated during row address latch time. Selects bank for read / write during column address latch time. DQ0~DQ7 Data Data inputs / outputs are multiplexed on the same pins. L(U)DQM Data Mask Makes data output Hi-Z, /RAS Row Address Strobe Latches row addresses on the positive edge of the CLK with /RAS low /CAS Column Address Strobe Latches Column addresses on the positive edge of the CLK with /CAS low /WE Write Enable Enables write operation and row recharge. VDD/VSS Power Supply/Ground Power and Ground for the input buffers and the core logic. VDDQ/VSSQ Data Output Power/Ground Power supply for output buffers. NC/RUF No Connection This pin is recommended to be left No Connection on the device. Block Diagram CK CKE Clock Generator Bank3 Bank2 Bank1 Mode Register Address Buffer & Refresh Counter Row Decoder Address Bank0 /CAS /WE Rev 1 April, 2001 Column Address Buffer & Refresh Counter DQM DQS Column Decoder Data Control Circuit 2 Data Latch /RAS Control Logic /CS Command Decoder Amplifier DQ0~DQn A-Data ADS6608A4A Absolute Maximum Ratings Parameter Symbol Value Unit VIN, Vout -1.0 ~ 4.6 V VDD, VDDQ -1.0 ~ 4.6 V TSTG -55 ~ +150 ℃ Power dissipation PD 1 W Short circuit current IOS 50 mA Voltage on any pin relative to Vss Voltage on VDD supply relative to Vss Storage temperature Note : Permanent device damage may occur if ABSOLUTE MAXIMUM RATING are exceeded. Functional operation should be restricted to recommended operating condition. Exposure to higher than recommended voltage for extended periods of time could affect device reliability. DC Operating Condition Voltage referenced to Vss = 0V, TA = 0 to 70 ℃ Parameter Symbol Min Typ Max Unit VDD, VDDQ 3.0 3.3 3.6 V Input logic high voltage VIH 2.0 3.0 VDD+0.3 V 1 Input logic low voltage VIL -0.3 0 0.8 V 2 Output logic high voltage VOH 2.4 - - V IOH=-2mA Output logic low voltage VOL - - 0.4 V IOL=2mA IIL -10 - 10 uA 3 Note Supply voltage Input leakage current Note Note : 1. VIH (max)=4.6V AC for pulse width ≦ 10ns acceptable. 2.VIL(min)=-1.5V AC for pulse width ≦ 10ns acceptable. 3.Any input 0V ≦ VIN ≦ VDD + 0.3V, all other pins are not under test = 0V. AC Operating Condition Voltage referenced to Vss = 0V, TA = 0 to 70 ℃ Parameter Symbol Value Unit VIH / VIL 2.4 / 0.4 V Vtrip 1.4 V Input rise / fall time TR / tF 1 Ns Output timing measurement reference level Voutfef 1.4 V CL 50 pF AC input high / low level voltage Input timing measurement reference level voltage Output load capacitance for access time measurement Note: 1. 3.15V ≦ VDD 2 ≦ 3.6V is applied for ADS6608A4A5. 2. Output load to measure access times is equivalent to two TTL gates and one capacitor (30pF). For details, refer to AC/DC output load circuit. Rev 1 April, 2001 3 A-Data ADS6608A4A Capacitance TA=25℃, f-=1Mhz, VDD=3.3V Parameter Pin Input capacitance Symbol Min Max Unit CLK Cl1 2.5 4 pF A0~A11,BA0,BA1,CKE,/CS,/RAS, Cl2 2.5 5 pF CI/O 4 6.5 pF /CAS,/WE,DQM Data input / output capacitance DQM Output load circuit 3.3 V 1200 ohms VOH(DC) = 2.4V,I OH= -2mA Output VOL(DC) = 0.4V,I OL= 2mA 50 pF 870 ohms DC Characteristics I Parameter Symbol Min Max Unit Note Input leakage current ILI -1 1 uA 1 Output leakage current ILO -1 1 uA 2 Output high voltage VOH 2.4 - V IOH = -4mA Output low voltage VOL - 0.4 V IOL = 4mA Note : 1.VIN = 0 TO 3.6V, All other pins are not tested under VIN = 0V. 2.DOUT is disabled, VOUT = 0 to 3.6. Rev 1 April, 2001 4 A-Data ADS6608A4A DC Characteristics II Speed Parameter Symbol Test condition Unit Note mA 1 -7.5 Burst length=1, One bank active Operating Current Precharge standby IDD1 IDD2P 75 tRC≧tRC(min),IOL=0mA CKE≦VIL(max), tCK=min 1 current in power down mode mA IDD2PS CKE≦VIL(max), tCK=∞ 1 CKE≧VIH(min), /CS≧VIH(min), tCK=min input signals are Precharge standby IDD2N changed one time during 2clks. current in Non power All other pins ≧VDD-0.2V or ≦ down mode 0.2V 15 mA CKE≧VIH(min), tCK=∞ IDD2NS 6 Input signals are stable. Active standby IDD3P CKE≦VIL(max), tCK=min 3 mA current in power down mode IDD3PS CKE≦VIL(max), tCK=∞ 3 CKE≧VIH(min), /CS≧VIH(min), tCK=min input signals are Active standby IDD3N changed one time during 2clks. current in Non power All other pins ≧VDD-0.2V or ≦ down mode 0.2V 30 mA CKE≧VIH(min), tCK=∞ IDD3NS 25 Input signals are stable. tCK≧tCK(min),IOL=0 mA Burst mode IDD4 operating current 115 mA 1 135 mA 2 1 mA All banks active tRRC≧tRRC(min), All banks Auto refresh current IDD5 active Self refresh current IDD6 CKE≦0.2V Note: 1. IDD1 and IDD4 depend on output loading and cycle rates. Specified values are measured with the output open. 2. Min. of tRRC is shown at AC characteristics. Rev 1 April, 2001 5 A-Data ADS6608A4A AC Characteristics -7.5 Parameter Symbol Unit Note Min System clock /CAS Latency = 3 tCK3 7.5 Cycle time tCK2 10 Clock high pulse width tCHW Clock low pulse width Access time Max 1000 ns 2.5 - ns 1 tCLW 2.5 - ns 1 /CAS Latency = 3 tAC3 - 5.4 ns 2 form clock /CAS Latency = 2 tAC2 - 6 /RAS cycle Operation tRC 65 - time Auto Refresh tRRC 65 - /RAS to /CAS delay tRCD 20 - ns /RAS active time tRAS 45 100 ns /RAS precharge time tRP 20 - ns /RAS to /RAS bank active delay tRRD 15 - ns /CAS to /CAS delay tCCD 1 - CLK Data – in active command tDAL 4 - CLK Data – out hold time tOH 3 - ns Address setup time tAS 1.5 - ns 1 Address hold time tAH 1 - ns 1 CKE setup time tCKS 1.5 - ns 1 CKE hold time tCKH 1 - ns 1 Command setup time tCS 1.5 - ns 1 Command hold time tCH 1 - ns 1 CLK to data output in low Z-time tOLZ 1.5 - ns MRS to new command tMRD 1 - CLK Power down exit time tPDE 1 - CLK Self refresh exit time tSRE 1 - CLK Refresh time tREF 64 - ms /CAS Latency = 2 ns Note : 1. Assume tR / tF (input rise and fall time) is 1 ns. 2. Access times to be measured with input signals of 1v / ns edge rate. 3.A new command can be given tRRC after self refresh exit. Rev 1 April, 2001 6 3 A-Data ADS6608A4A Command Truth-Table Command CKEn-1 CKEn /CS /RAS /CAS /WE DQM Mode Register Set H X L L L L X OP code H X X X No Operation H X X X L H H H Bank Active H X L L H H X H X L H L H X ADDR A10/AP RA Read BA V L CA Read with Auto Precharge Write H X L H L L X CA Write with Auto Precharge H X L L H L X Precharge select Bank Burst Stop H DQM H Auto Refresh H H L L L Entry H L L L X L H H L H Exit L H L X X L H X H H H X X X Precharge L H H H Power down H X X X L V V V H X X X L V V V Exit Rev 1 April, 2001 L X X L X H X X L Clock Suspend V H X H L X X L X V X H H X H Entry V X X X Self Refresh Exit L H Precharge All Bank Entry V H X H X 7 X X A-Data ADS6608A4A Package Information SYMBOL A A1 A2 B c D HE E e L L1 MIN. 0.05 0.95 0.30 0.12 11.56 10.03 0.80 BSC 0.40 S θ 0° MILLIMETER NOM. 0.10 1.00 0.35 22.22 BSC 11.76 10.16 0.50 0.80 REF 0.71 REF - MAX. 1.20 0.15 1.05 0.45 0.21 11.96 10.29 MIN. 0.002 0.037 0.012 0.005 0.60 0.460 0.390 0.031 0.016 8° 0° 400mil 54pin TSOP II Package Rev 1 April, 2001 8 INCH NOM. 0.004 0.039 0.014 0.875 BSC 0.463 0.400 0.020 0.031 REF 0.028 REF - MAX. 0.047 0.006 0.041 0.018 0.008 0.470 0.410 0.024 8°