WED2ZL362MSJ White Electronic Designs 72Mb, 2M x 36 Synchronous Pipeline Burst NBL SRAM Advanced FEATURES DESCRIPTION n n n n n n n The WEDC SyncBurst - SRAM family employs highspeed, low-power CMOS designs that are fabricated using an advanced CMOS process. WEDCs 72Mb SyncBurst SRAMs integrate two 2M x 18 SRAMs into a single BGA package to provide a 2M x 36 configuration. All synchronous inputs pass through registers controlled by a positive-edge-triggered single-clock input (CLK). The NBL or No Bus Latency Memory utilizes all the bandwidth in any combination of operating cycles. Address, data inputs, and all control signals except output enable and linear burst order are synchronized to input clock. Burst order control must be tied High or Low. Asynchronous inputs include the sleep mode enable (ZZ) and Output Enable (OE). Write cycles are internally self-timed and initiated by the rising edge of the clock input. This feature eliminates complex off-chip write pulse generation and provides increased timing flexibility for incoming signals. Fast clock speed: 225, 200, 166 and 150MHz Fast access times: 2.8, 3.0, 3.5 and 3.8ns Fast OE access times: 2.8, 3.0, 3.5 and 3.8ns Separate Core and I/O Power Supply Snooze Mode for reduced-standby power Individual Byte Write control Clock-controlled and registered addresses, data I/Os and control signals n Burst control (interleaved or linear burst) n Packaging: 119-bump BGA package, JEDEC Pin Definition n Low capacitive bus loading FIG. 1 PIN CONFIGURATION (TOP VIEW) July 2002 Rev 0 ECO # 15239 2 SA CE 2 SA DQP C DQ C DQ C DQ C DQ C VDD DQ D DQ D DQ D DQ D DQP D SA SA RFU 3 SA SA SA V SS V SS V SS BW C V SS NC V SS BW D V SS V SS V SS LBO SA RFU 4 SA ADV VDD NC CE 1 OE SA WE VDD CLK NC CKE SA 1 SA 0 VDD SA RFU 5 SA SA SA V SS V SS V SS BW B V SS NC V SS BW A V SS V SS V SS NC SA RFU 6 SA CE 2 SA DQP B DQ B DQ B DQ B DQ B VDD DQ A DQ A DQ A DQ A DQP A SA SA NC 7 V DDQ NC NC DQ B DQ B V DDQ DQ B DQ B V DDQ DQ A DQ A V DDQ DQ A DQ A NC ZZ V DDQ BWA BWB 1 V DDQ NC NC DQ C DQ C V DDQ DQ C DQ C V DDQ DQ D DQ D V DDQ DQ D DQ D NC NC V DDQ BWC BWD A B C D E F G H J K L M N P R T U BLOCK DIAGRAM 2M x 18 CLK CKE ADV LBO CE1 CE2 CE2 OE WE ZZ CLK CKE ADV LBO CS1 CS2 CS2 OE WE ZZ 2M x 18 CLK CKE ADV LBO CS1 CS2 CS2 OE WE ZZ Address Bus (SA0 ñ SA20) DQC, DQD DQPC, DQPD DQA, DQB DQPA, DQPB DQA ñ DQD DQPA ñ DQPD 1 White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com White Electronic Designs WED2ZL362MSJ FUNCTION DESCRIPTION Write operation occurs when WE is driven low at the rising edge of the clock. BW[d:a] can be used for byte write operation. The pipe-lined NBL SSRAM uses a late-late write cycle to utilize 100% of the bandwidth. At the first rising edge of the clock, WE and address are registered, and the data associated with that address is required two cycle later. The WED2ZL362MSJ is an NBL SSRAM designed to sustain 100% bus bandwidth by eliminating turnaround cycle when there is transition from Read to Write, or vice versa. All inputs (with the exception of OE, LBO and ZZ) are synchronized to rising clock edges. All read, write and deselect cycles are initiated by the ADV input. Subsequent burst addresses can be internally generated by the burst advance pin (ADV). ADV should be driven to Low once the device has been deselected in order to load a new address for next operation. Subsequent addresses are generated by ADV High for the burst access as shown below. The starting point of the burst seguence is provided by the external address. The burst address counter wraps around to its initial state upon completion. The burst sequence is determined by the state of the LBO pin. When this pin is low, linear burst sequence is selected. And when this pin is high, Interleaved burst sequence is selected. Clock Enable (CKE) pin allows the operation of the chip to be suspended as long as necessary. When CKE is high, all synchronous inputs are ignored and the internal device registers will hold their previous values. NBL SSRAM latches external address and initiates a cycle when CKE and ADV are driven low at the rising edge of the clock. During normal operation, ZZ must be driven low. When ZZ is driven high, the SRAM will enter a Power Sleep Mode after 2 cycles. At this time, internal state of the SRAM is preserved. When ZZ returns to low, the SRAM operates after 2 cycles of wake up time. Output Enable (OE) can be used to disable the output at any given time. Read operation is initiated when at the rising edge of the clock, the address presented to the address inputs are latched in the address register, CKE is driven low, the write enable input signals WE are driven high, and ADV driven low. The internal array is read between the first rising edge and the second rising edge of the clock and the data is latched in the output register. At the second clock edge the data is driven out of the SRAM. During read operation OE must be driven low for the device to drive out the requested data. BURST SEQUENCE TABLE LBO Pin High First Address Fourth Address Case 1 A1 A0 0 0 0 1 1 0 1 1 (Interleaved Burst, LBO = High) Case 2 Case 3 Case 4 A1 A0 A1 A0 A1 A0 0 1 1 0 1 1 0 0 1 1 1 0 1 1 0 0 0 1 1 0 0 1 0 0 LBO Pin High First Address Fourth Address NOTE 1: LBO pin must be tied to High or Low, and Floating State must not be allowed. White Electronic Designs Corporation Westborough, MA (508) 366-5151 2 Case 1 A1 A0 0 0 0 1 1 0 1 1 (Linear Burst, LBO = Low) Case 2 Case 3 Case 4 A1 A0 A1 A0 A1 A0 0 1 1 0 1 1 1 0 1 1 0 0 1 1 0 0 0 1 0 0 0 1 1 0 WED2ZL362MSJ White Electronic Designs TRUTH TABLES SYNCHRONOUS TRUTH TABLE CEx H X L X L X L X L X X ADV L H L H L H L H L H X WE X X H X H X L X L X X BWx X X X X X X L L H H X OE X X L L H H X X X X X CKE L L L L L L L L L L H CLK Address Accessed N/A N/A External Address Next Address External Address Next Address External Address Next Address N/A Next Address Current Address Operation Deselect Continue Deselect Begin Burst Read Cycle Continue Burst Read Cycle NOP/Dummy Read Dummy Read Begin Burst Write Cycle Continue Burst Write Cycle NOP/Write Abort Write Abort Ignore Clock NOTES: 1. X means Dont Care. 2. The rising edge of clock is symbolized by ( ) 3. A continue deselect cycle can only be entered if a deselect cycle is executed first. 4. WRITE = L means Write operation in WRITE TRUTH TABLE. WRITE = H means Read operation in WRITE TRUTH TABLE. 5. Operation finally depends on status of asynchronous input pins (ZZ and OE). 6. CEx refers to the combination of CE1, CE2 and CE2. WRITE TRUTH TABLE WE H L L L L L L BWa X L H H H L H BWb X H L H H L H BWc X H H L H L H BWd X H H H L L H Operation Read Write Byte a Write Byte b Write Byte c Write Byte d Write All Bytes Write Abort/NOP NOTES: 1. X means Dont Care. 2. All inputs in this table must meet setup and hold time around the rising edge of CLK ( ). 3 White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com WED2ZL362MSJ White Electronic Designs A BSOLUTE MAXIMUM RATINGS* Voltage on VDD Supply Relative to VSS VIN (DQx) VIN (Inputs) Storage Temperature (BGA) Short Circuit Output Current -0.3V to +3.6V -0.3V to +3.6V -0.3V to +3.6V -55°C to +125°C 100mA *Stress greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions greater than those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating condtions for extended periods may affect reliability. ELECTRICAL CHARACTERISTICS Description Input High (Logic 1) Voltage Input Low (Logic 0) Voltage Input Leakage Current Output Leakage Current Output High Voltage Output Low Voltage Supply Voltage Symbol VIH VIL ILI ILO VOH VOL VDD Conditions Min 1.7 -0.3 -5 -5 2.0 2.375 0V £ VIN £ VDD Output(s) Disabled, 0V £ VIN £ VDD I OH = -1.0mA I OL = 1.0mA Max VDD +0.3 0.7 5 5 0.4 2.625 Units V V µA µA V V V Notes 1 1 2 1 1 1 NOTES: 1. All voltages referenced to VSS (GND) 2. ZZ pin has an internal pull-up, and input leakage is higher. DC CHARACTERISTICS Description Power Supply Current: Operating Power Supply Current: Standby Symbol I DD I SB 2 Power Supply Current: Current ISB3 Clock Running Standby Current ISB4 Conditions Device Selected; All Inputs £ VIL or ³ VIH; Cycle Time = tCYC MIN; VDD = MAX; Output Open Device Deselected; VDD = MAX; All Inputs £ VSS + 0.2 or VDD - 0.2; All Inputs Static; CLK Frequency = 0; ZZ £ VIL Device Selected; All Inputs £ VIL or ³ VIH; Cycle Time = tCYC MIN; VDD = MAX; Output Open; ZZ ³ VDD - 0.2V Device Deselected; VDD = MAX; All Inputs £ VSS + 0.2 or VDD - 0.2; Cycle Time = t CYC MIN; ZZ £ VIL Typ 225 MHz 800 200 MHz 740 166 MHz 690 150 MHz 640 Units mA Notes 1, 2 30 60 60 60 60 mA 3 20 40 40 40 40 mA 2 160 148 135 125 mA 2 NOTES: 1. IDD is specified with no output current and increases with faster cycle times. 2. Typical values are measured at 2.5V, 25°C, and 10ns cycle time. 3. Typical values are measured at 2.5V, 25°C. BGA CAPACITANCE Description Control Input Capacitance Input/Output Capacitance (DQ) Address Capacitance Clock Capacitance Symbol CI CO CA CCK Conditions TA = 25°C; f = 1MHz TA = 25°C; f = 1MHz TA = 25°C; f = 1MHz TA = 25°C; f = 1MHz NOTES: 1. This parameter is sampled. White Electronic Designs Corporation Westborough, MA (508) 366-5151 4 Typ 5 6 5 3 Max 7 8 7 5 Units pF pF pF pF Notes 1 1 1 1 WED2ZL362MSJ White Electronic Designs AC CHARACTERISTICS Symbol Parameter Clock Time Clock Access Time Output enable to Data Valid Clock High to Output Low-Z Output Hold from Clock High Output Enable Low to output Low-Z Output Enable High to Output High-Z Clock High to Output High-Z Clock High Pulse Width Clock Low Pulse Width Address Setup to Clock High CKE Setup to Clock High Data Setup to Clock High Write Setup to Clock High Address Advance to Clock High Chip Select Setup to Clock High Address Hold to Clock high CKE Hold to Clock High Data Hold to Clock High Write Hold to Clock High Address Advance to Clock High Chip Select Hold to Clock High tCYC tCD tOE tLZC tOH tLZOE tHZOE tHZC tCH tCL tAS tCES tDS tWS tADVS tCSS tAH tCEH tDH tWH tADVH tCSH 225MHz Min Max 4.4 2.8 2.8 1.5 1.5 0.0 2.5 2.5 1.8 1.8 1.5 1.5 1.5 1.5 1.5 1.5 0.5 0.5 0.5 0.5 0.5 0.5 200MHz Min Max 5.0 3.0 3.0 1.5 1.5 0.0 2.5 2.5 2.0 2.0 1.5 1.5 1.5 1.5 1.5 1.5 0.5 0.5 0.5 0.5 0.5 0.5 166MHz Min Max 6.0 3.5 3.5 1.5 1.5 0.0 3.0 3.0 2.2 2.2 1.5 1.5 1.5 1.5 1.5 1.5 0.5 0.5 0.5 0.5 0.5 0.5 150MHz Min Max 6.7 3.8 3.8 1.5 1.5 0.0 3.0 3.0 2.5 2.5 1.5 1.5 1.5 1.5 1.5 1.5 0.5 0.5 0.5 0.5 0.5 0.5 Units ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns NOTES: 1. All Address inputs must meet the specified setup and hold times for all rising clock (CLK) edges when ADV is sampled low and CEx is sampled valid. All other synchronous inputs must meet the specified setup and hold times whenever this device is chip selected. 2. Chip enable must be valid at each rising edge of CLK (when ADV is Low) to remain enabled. 3. A WRITE cycle is defined by WE low having been registered into the device at ADV Low. A READ cycle is defined by WE High with ADV Low. Both cases must meet setup and hold times. AC TEST CONDITIONS (VDD = 2.5V ± 5%, UNLESS OTHERWISE SPECIFIED) Parameter Input Pulse Level Input Rise and Fall Time (Measured at 20% to 80%) Input and Output Timing Reference Levels Output Load OUTPUT LOAD (A) Value 0 to 2.5V 1.0V/ns 1.25V See Output Load (A) OUTPUT LOAD (B) (FOR tLZC, tLZOE, tHZOE, AND tHZC) +2.5V Dout RL=50Ω Zo=50Ω 1667Ω Dout VL=1.25V 30pF* 1538Ω 5pF* *Including Scope and Jig Capacitance 5 White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com WED2ZL362MSJ White Electronic Designs SNOOZE MODE When ZZ becomes a logic HIGH, ISB2Z is guaranteed after the setup time tZZ is met. Any READ or WRITE operation pending when the device enters SNOOZE MODE is not guaranteed to complete successfully. Therefore, SNOOZE MODE must not be initiated until valid pending operations are completed. SNOOZE MODE is a low-current, power-down mode in which the device is deselected and current is reduced to ISB2Z. The duration of SNOOZE MODE is dictated by the length of time Z is in a HIGH state. After the device enters SNOOZE MODE, all inputs except ZZ become gated inputs and are ignored. ZZ is an asynchronous, active HIGH input that causes the device to enter SNOOZE MODE. SNOOZE MODE Description Current during SNOOZE MODE ZZ active to input ignored ZZ inactive to input sampled ZZ active to snooze current ZZ inactive to exit snooze current Conditions ZZ ³ VIH Symbol I SB2Z tZZ tRZZ tZZI tRZZI Min Max 10 2(tKC) Units mA ns ns ns ns 2(tKC) 2(tKC) FIG. 2 SNOOZE MODE TIMING DIAGRAM CLOCK t ZZ t RZZ ZZ t ZZI ISUPPLY t RZZI I ISB2Z ALL INPUTS (except ZZ) Output (Q) DESELECT or READ Only HIGH-Z DON'T CARE White Electronic Designs Corporation Westborough, MA (508) 366-5151 6 Notes 1 1 1 1 WED2ZL362MSJ White Electronic Designs FIG. 3 TIMING WAVEFORM OF READ CYCLE tCH tCL Clock tCYC tCES tCEH CKE tAS tAH A1 Address A2 tWS tWH tCSS tCSH tADVS tADVH A3 WRITE CEx ADV OE tOE tHZOE tLZOE Data Out Q1-1 tCD tOH Q2-1 tHZC Q2-2 Q2-3 Q2-4 Q3-1 Q3-2 Q3-3 Q3-4 Don't Care NOTES: WRITE = L means WE = L, and BWx = L CEx refers to the combination of CE1, CE2 and CE2. Undefined 7 White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com WED2ZL362MSJ White Electronic Designs FIG. 4 TIMING WAVEFORM OF WRITE CYCLE tCH tCL Clock tCYC tCES tCEH CKE Address A2 A1 A3 WRITE CEx ADV OE tDS Data In D1-1 D2-1 D2-2 D2-3 D2-4 D3-1 tDH D3-2 D3-3 D3-4 tHZOE Data Out Q0-3 Q0-4 Don't Care NOTES: WRITE = L means WE = L, and BWx = L CEx refers to the combination of CE1, CE2 and CE2. White Electronic Designs Corporation Westborough, MA (508) 366-5151 Undefined 8 WED2ZL362MSJ White Electronic Designs FIG. 5 TIMING WAVEFORM OF SINGLE READ/WRITE tCH tCL Clock tCYC tCES tCEH CKE Address A1 A2 A3 A4 Q1 Q3 A5 A6 A8 A7 A9 WRITE CEx ADV OE tOE tLZOE Data Out Q6 Q7 tDH tDS Data In Q4 D2 D5 Don't Care NOTES: WRITE = L means WE = L, and BWx = L CEx refers to the combination of CE1, CE2 and CE2. Undefined 9 White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com WED2ZL362MSJ White Electronic Designs FIG. 6 TIMING WAVEFORM OF CKE OPERATION tCL tCH Clock tCES tCEH tCYC CKE Address A1 A2 A3 A4 A5 A6 WRITE CEx ADV OE tCD tLZC Data Out tHZC Q1 Q3 tDH tDS Data In Q4 D2 Don't Care NOTES: WRITE = L means WE = L, and BWx = L CEx refers to the combination of CE1, CE2 and CE2. White Electronic Designs Corporation Westborough, MA (508) 366-5151 Undefined 10 WED2ZL362MSJ White Electronic Designs FIG. 7 TIMING WAVEFORM OF CE OPERATION tCH tCL Clock tCYC tCEH tCES CKE Address A1 A2 A3 A4 A5 WRITE CEx ADV OE tHZC tOE tLZOE Data Out Q1 tCD tLZC Q2 Q4 tDS tDH Data In D3 D5 Don't Care NOTES: WRITE = L means WE = L, and BWx = L CEx refers to the combination of CE1, CE2 and CE2. Undefined 11 White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com WED2ZL362MSJ White Electronic Designs PACKAGE DIMENSION: 119 BUMP PBGA 2.50 (0.099) MAX 7.62 (0.300) TYP 14.00 (0.551) TYP R 1.52 (0.060) MAX (4x) 7 6 5 4 3 2 1 A B A1 CORNER C D E F 1.27 (0.050) TYP G H 20.32 (0.800) TYP 22.00 (0.866) TYP J K L M N P R T U 0.600 (0.024) MAX 1.27 (0.050) TYP ALL LINEAR DIMENSIONS ARE IN MILLIMETERS AND PARENTHETICALLY IN INCHES NOTE: Ball attach pad for above BGA package is 620 microns in diameter. Pad is solder mask defined. ORDERING INFORMATION Commercial Temp Range (0°C to 70°C), Industrial Temp. Range (-40° to 85°C) Part Number Configuration t CD Clock Operating (ns) (MHz) Range WED2ZL362MSJ35ES 2M x 36 3.5 166 Engineering Samples WED2ZL362MSJ38ES 2M x 36 3.8 150 Engineering Samples WED2ZL362MSJ28BC 2M x 36 2.8 225 Commercial WED2ZL362MSJ30BC 2M x 36 3.0 200 Commercial WED2ZL362MSJ35BC 2M x 36 3.5 166 Commercial WED2ZL362MSJ38BC 2M x 36 3.8 150 Commercial WED2ZL362MSJ30BI 2M x 36 3.0 200 Industrial WED2ZL362MSJ35BI 2M x 36 3.5 166 Industrial WED2ZL362MSJ38BI 2M x 36 3.8 150 Industrial White Electronic Designs Corporation Westborough, MA (508) 366-5151 12