KM416C256D, KM416V256D CMOS DRAM 256K x 16Bit CMOS Dynamic RAM with Fast Page Mode DESCRIPTION This is a family of 262,144 x 16 bit Fast Page Mode CMOS DRAMs. Fast Page Mode offers high speed random access of memory cells within the same row. Power supply voltage (+5.0V or +3.3V), access time (-5,-6,-7), power consumption(Normal or Low power) and package type(SOJ or TSOP-II) are optional features of this family. All of this family have CAS-before-RAS refresh, RAS-only refresh and Hidden refresh capabilities. Furthermore, Self-refresh operation is available in L-version. This 256Kx16 fast page mode DRAM family is fabricated using Samsung's advanced CMOS process to realize high band-width, low power consumption and high reliability. It may be used as graphic memory unit for microcomputer, personal computer and portable machines. FEATURES Part Identification - KM416C256D/DL (5V, 512K Ref.) - KM416V256D/DL (3.3V, 512K Ref.) ¡Ü Active Power Dissipation Unit : mW Speed 3.3V(512 Ref.) 2 CAS Byte/Wrod Read/Write operation ¡Ü CAS-before-RAS refresh capability ¡Ü RAS-only and Hidden refresh capability ¡Ü Self-refresh capability (L-ver only) ¡Ü TTL(5V)/LVTTL(3.3V) compatible inputs and outputs ¡Ü Early Write or output enable controlled write ¡Ü JEDEC Standard pinout ¡Ü Available in 40-pin SOJ 400mil and44(40)-pin TSOP(II) 400mil packages -5 - 605 -6 325 495 ¡Ü Triple +5V¡¾10% power supply(5V product) 440 ¡Ü Triple +3.3V¡¾0.3V power supply(3.3V product) -7 ¡Ü 5V(512 Ref.) Fast Page Mode operation ¡Ü 290 Refresh Cycles Part NO. VCC C256D 5V V256D 3.3V FUNCTIONAL BLOCK DIAGRAM Refresh cycle Refresh period Normal L-ver 512K 8ms 128ms RAS UCAS LCAS W Control Clocks Refresh Timer ¡Ü tRAC tCAC tRC tPC Remark Refresh Control -5 50ns 15ns 90ns 35ns 5V only Refresh Counter -6 60ns 15ns 10ns 40ns 5V/3.3V -7 70ns 20ns 130ns 45ns 5V/3.3V A0 . . A8 Memory Array 262,144 x16 Cells Row Address Buffer Col. Address Buffer Lower Data in Buffer Row Decoder Performance Range: Speed Vcc Vss VBB Generator Column Decoder SAMSUNG ELECTRONICS CO., LTD. reserves the right to change products and specifications without notice. Sense Amps & I/O ¡Ü ¡Ü Lower Data out Buffer Upper Data in Buffer Upper Data out Buffer DQ0 to DQ7 OE DQ8 to DQ15 KM416C256D, KM416V256D CMOS DRAM PIN CONFIGURATION (Top Views) ¡Ü VCC DQ0 DQ1 DQ2 DQ3 VCC DQ4 DQ5 DQ6 DQ7 N.C N.C W RAS N.C A0 A1 A2 A3 VCC KM416C/V256DJ 1 ¡Û 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 ¡Û ¡Ü VSS DQ15 DQ14 DQ13 DQ12 VSS DQ11 DQ10 DQ9 DQ8 N.C LCAS UCAS OE A8 A7 A6 A5 A4 VSS KM416C/V256DT VCC DQ0 DQ1 DQ2 DQ3 VCC DQ4 DQ5 DQ6 DQ7 1 ¡Û 2 3 4 5 6 7 8 9 10 40 39 38 37 36 35 34 33 32 31 VSS DQ15 DQ14 DQ13 DQ12 VSS DQ11 DQ10 DQ9 DQ8 N.C N.C W RAS N.C A0 A1 A2 A3 VCC 11 12 13 14 15 16 17 18 19 20 30 29 28 27 26 25 24 23 22 21 N.C LCAS UCAS OE A8 A7 A6 A5 A4 VSS (SOJ) ¡Û (TSOP-II) Pin Name A0 - A8 DQ0 - 15 Pin Function Address Inputs Data In/Out VSS Ground RAS Row Address Strobe UCAS Upper Column Address Strobe LCAS Lower Column Address Strobe W Read/Write Input OE Data Output Enable VCC Power(+5V) Power(+3.3V) N.C No Connection KM416C256D, KM416V256D CMOS DRAM ABSOLUTE MAXIMUM RATINGS Parameter Rating Symbol Units 3.3V 5V VIN,VOUT -0.5 to +4.6 -1.0 to +7.0 V Voltage on VCC supply relative to VSS VCC -0.5 to +4.6 -1.0 to +7.0 V Storage Temperature Tstg -55 to +150 -55 to +150 ¡É Power Dissipation PD 1 1 W Short Circuit Output Current IOS 50 50 mA Voltage on any pin relative to VSS * Permanent device damage may occur if "ABSOLUTE MAXIMUM RATINGS" are exceeded. Functional operation should be restricted to the conditions as detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS (Voltage referenced to Vss, T A= 0 to 70¡É) Parameter 3.3V Symbol 5V Units Min Typ Max Min Typ Max Supply Voltage VCC 3.0 3.3 3.6 4.5 5.0 5.5 V Ground VSS 0 0 0 0 0 0 V Input High Voltage VIH 2.0 - 2.4 - Input Low Voltage VIL *2 -0.3 VCC+0.3*1 - 0.8 -1.0 *2 - VCC+1.0 *1 0.8 V V *1 : VCC+1.3V/15ns(3.3V), VCC+2.0V/20ns(5V), Pulse width is measured at VCC *2 : -1.3V/15ns(3.3V), -2.0V/20ns(5V), Pulse width is measured at VSS DC AND OPERATING CHARACTERISTICS (Recommended operating conditions unless otherwise noted.) Max 3.3V 5V Parameter Symbol Min Max Units Input Leakage Current (Any input 0¡ÂVIN¡ÂVIN+0.3V, all other input pins not under test=0 Volt) II(L) -5 5 uA Output Leakage Current (Data out is disabled, 0V¡ÂVOUT¡ÂVCC) IO(L) -5 5 uA Output High Voltage Level(IOH=-2mA) VOH 2.4 - V Output Low Voltage Level(IOL=2mA) VOL - 0.4 V Input Leakage Current (Any input 0¡ÂVIN¡ÂVIN+0.5V, all other input pins not under test=0 Volt) II(L) -5 5 uA Output Leakage Current (Data out is disabled, 0V¡ÂVOUT¡ÂVCC) IO(L) -5 5 uA Output High Voltage Level(IOH=-5mA) VOH 2.4 - V Output Low Voltage Level(IOL=4.2mA) VOL - 0.4 V KM416C256D, KM416V256D CMOS DRAM DC AND OPERATING CHARACTERISTICS (Continued) Max Symbol Power Speed Units KM416V254D KM416C254D -5 -6 -7 Don't care 90 80 1 110 90 80 2 mA mA mA mA -5 -6 -7 -5 -6 -7 90 80 60 55 0.5 100 110 90 80 70 60 55 1 150 mA mA mA mA mA mA mA uA 90 80 200 110 90 80 300 mA mA mA uA 100 200 uA ICC1 Don't care ICC2 Don't care ICC3 Don't care ICC4 Don't care ICC5 Normal L ICC6 Don't care ICC7 L -5 -6 -7 Don't care ICCS L Don't care Don't care ICC1* : Operating Current (RAS and UCAS, LCAS, Address cycling @tRC=min.) ICC2 : Standby Current (RAS=UCAS=LCAS=W=VIH) ICC3* : RAS-only Refresh Current (UCAS=LCAS=VIH, RAS, Address cycling @tRC=min.) ICC4* : Fast Page Mode Current (RAS=VIL, UCAS or LCAS, Address cycling @tPC=min.) ICC5 : Standby Current (RAS=UCAS=LCAS=W=VCC-0.2V) ICC6* : CAS-Before-RAS Refresh Current (RAS and UCAS or LCAS cycling @tRC=min.) ICC7 : Battery back-up current, Average power supply current, Battery back-up mode Input high voltage(VIH)=VCC-0.2V, Input low voltage(VIL)=0.2V, UCAS, LCAS=0.2V, Din=Don't care, TRC=125us, TRAS=TRASmin~300ns ICCS : Self Refresh Current RAS=UCAS=LCAS=VIL, W=OE=A0 ~ A8=VCC-0.2V or 0.2V, DQ0 ~ DQ15=VCC-0.2V, 0.2V or Open *Note : ICC1, ICC3, ICC4 and ICC6 are dependent on output loading and cycle rates. Specified values are obtained with the output open. ICC is specified as an average current. In ICC1, ICC3, ICC6 and ICC7, address can be changed maximum once while RAS=VIL. In ICC4, address can be changed maximum once within one fast page mode cycle time, tPC. KM416C256D, KM416V256D CMOS DRAM CAPACITANCE (TA=25¡É, VCC=5V or 3.3V, f=1MHz) Parameter Symbol Min Max Units Input capacitance [A0 ~ A8] CIN1 - 5 pF Input capacitance [RAS, UCAS, LCAS, W, OE] CIN2 - 7 pF Output capacitance [DQ0 - DQ15] CDQ - 7 pF AC CHARACTERISTICS (0¡É¡Â TA¡Â70¡É, See note 1,2) Test condition (5V device) : VCC=5.0V¡¾10%, Vih/Vil=2.4/0.8V, Voh/Vol=2.4/0.4V Test condition (3.3V device) : VCC=3.3V¡¾0.3V, Vih/Vil=2.2/0.7V, Voh/Vol=2.0/0.8V Parameter -5 Symbol Min *1 Max -6 Min -7 Max Min Units Notes Max Random read or write cycle time tRC 90 110 130 ns Read-modify-write cycle time tRWC 132 152 177 ns Access time from RAS tRAC 50 60 70 ns 3,4,10 Access time from CAS tCAC 15 15 20 ns 3,4,5 Access time from column address tAA 25 30 35 ns 3,10 CAS to output in Low-Z tCLZ 0 ns 3 Output buffer turn-off delay tOFF 0 12 0 12 0 17 ns 6 Transition time (rise and fall) tT 3 50 3 50 3 50 ns 2 RAS precharge time tRP 30 RAS pulse width tRAS 50 RAS hold time tRSH 15 15 20 ns CAS hold time tCSH 50 60 70 ns CAS pulse width tCAS 15 10K 15 10K 20 10K ns RAS to CAS delay time tRCD 20 35 20 45 20 50 ns 4 RAS to column address delay time tRAD 15 25 15 30 15 35 ns 10 CAS to RAS precharge time tCRP 5 5 5 ns Row address set-up time tASR 0 0 0 ns Row address hold time tRAH 10 10 10 ns Column address set-up time tASC 0 0 0 ns 12 Column address hold time tCAH 10 10 15 ns 12 Column address to RAS lead time tRAL 25 30 35 ns Read command set-up time tRCS 0 0 0 ns Read command hold time referenced to CAS tRCH 0 0 0 ns 8 Read command hold time referenced to RAS tRRH 0 0 0 ns 8 Write command set-up time tWCS 0 0 0 ns 7 Write command hold time tWCH 10 10 15 ns Write command pulse width tWP 10 10 15 ns Write command to RAS lead time tRWL 15 15 15 ns Write command to CAS lead time tCWL 13 15 15 ns Note) *1 : 5V only 0 0 40 10K 60 50 10K 70 ns 10K ns 15 KM416C256D, KM416V256D CMOS DRAM AC CHARACTERISTICS (Continued) Parameter *1-5 Symbol Min -6 Max Min -7 Max Min Units Notes Max Data set-up time tDS 0 0 0 ns 9,19 Data hold time tDH 10 10 15 ns 9,19 Refresh period (Normal) tREF Refresh period (L-ver) tREF CAS to W delay time 8 8 128 128 8 ms 128 ms tCWD 37 37 47 ns 7,14 RAS to W delay time tRWD 72 82 97 ns 7 Column address to W delay time tAWD 47 52 62 ns 7 CAS precharge to W delay time tCPWD 52 57 67 ns 7 CAS set-up time (CAS -before-RAS refresh) tCSR 10 10 10 ns 17 CAS hlod time (CAS -before-RAS refresh) 18 tCHR 10 10 10 ns RAS to CAS precharge time tRPC 5 5 5 ns CAS precharge time (CBR counter test cycle) tCPT 20 20 25 ns Access time from CAS precharge tCPA Fast Page mode cycle time tPC 35 40 45 ns Fast Page read-modify-write cycle time tPRWC 77 82 97 ns CAS precharge time (Fast Page cycle) 30 tCP 10 RAS pulse width (Fast Page cycle) tRASP 50 RAS hold time from CAS precharge tRHCP 30 OE access time tOEA OE to data delay tOED Output buffer turn off delay time from OE 35 10 100K 60 10 100K 35 15 12 70 15 20 0 13 ns ns 17 12 3 ns ns tOEZ 0 OE command hold time tOEH 15 15 20 ns RAS pulse width (C-B-R self refresh) tRASS 100 100 100 us 11 RAS precharge time (C-B-R self refresh) tRPS 90 110 130 ns 11 CAS hold time (C-B-R self refresh) tCHS -50 -50 -50 ns 11 Note) *1 : 5V only 0 ns ns 100K 40 12 12 40 17 ns 6 KM416C256D, KM416V256D CMOS DRAM NOTES 1. An initial pause of 200us is required after power-up followed by any 8 ROR or CBR cycles before proper device operation is achieved. 2. Input voltage levels are Vih/Vil. VIH(min) and VIL(max) are reference levels for measuring timing of input signals. Transition times are measured between VIH(min) and VIL(max) and are assumed to be 5ns for all inputs. 3. Measured with a load equivalent to 2 TTL(5V)/1TTL(3.3V) loads and 50pF. 4. Operation within the tRCD(max) limit insures that tRAC(max) can be met. tRCD(max) is specified as a reference point only. If tRCD is greater than the specified tRCD(max) limit, then access time is controlled exclusively by tCAC. 5. Assumes that tRCD¡ÃtRCD(max). 6. This parameter defines the time at which the output achieves the open circuit condition and is not referenced to Voh or Vol. 7. tWCS, tRWD, tCWD, tAWD and tCPWD are non restrictive operating parameters. They are included in the data sheet as electrical characteristics only. If tWCS¡ÃtWCS(min), the cycles is an early write cycle and the data output will remain high impedance for the duration of the cycle. If tCWD¡ÃtCWD(min), tRWD¡ÃtRWD(min), tAWD¡ÃtAWD(min) and tCPWD¡ÃtCPWD(min) then the cycle is a read-modify-write cycle and the data output will contain the data read from the selected address. If neither of the above conditions is satisfied, the condition of the data out is indeterminate. 8. Either tRCH or tRRH must be satisfied for a read cycle. 9. These parameters are referenced to the CAS leading edge in ealy write cycles and to the W FALLing edge in OE controlled write cycle and read-modify-write cycles. 10. Operation within the tRAD(max) limit insures that tRAC(max) can be met. tRAD(max) is specified as a reference point only. If tRAD is greater than the specified tRAD(max) limit, then access time is controlled by tAA. KM416C/V256D/DL Truth Table RAS LCAS UCAS W OE DQ0 - DQ7 DQ8-DQ15 STATE H H H H H Hi-Z Hi-Z Standby L H H H H Hi-Z Hi-Z Refresh L L H H L DQ-OUT Hi-Z Byte Read L H L H L Hi-Z DQ-OUT Byte Read L L L H L DQ-OUT DQ-OUT Word Read L L H L H DQ-IN - Byte Write L H L L H - DQ-IN Byte Write L L L L H DQ-IN DQ-IN Word Write L L L H H Hi-Z Hi-Z - KM416C256D, KM416V256D CMOS DRAM 11. 512cycle of burst refresh must be executed within 8ms before and after self refresh in order to meet refresh specification (Lversion). 12. tASC, tCAH are referenced to the earlier CAS rising edge. 13. tCP is specified from the last CAS rising edge in the previous cycle to the first CAS falling edge in the next cycle. 14. tCWD is referenced to the later CAS falling edge at word red-modify-write cycle. 15. tCWL is specified from W falling edge to the earlier CAS rising edge. 16. tCSR is referenced to earlier CAS falling low before RAS transition low. 17. tCHR is referenced to the later CAS rising high after RAS transition low. RAS LCAS UCAS tCSR 20. tDS, tDH are specified for earlier CAS falling low. LCAS UCAS tDS DQ0 ~ DQ15 w tDH Din tCHR