GS8640FZ18/36T-xxxV 100-Pin TQFP Commercial Temp Industrial Temp 6.5 ns–8.0 ns 1.8 V or 2.5 V VDD 1.8 V or 2.5 V I/O 72Mb Flow Through Synchronous NBT SRAM Features • NBT (No Bus Turn Around) functionality allows zero wait read-write-read bus utilization; Fully pin-compatible with flow through NtRAM™, NoBL™ and ZBT™ SRAMs • 1.8 V or 2.5 V core power supply • 1.8 V or 2.5 V I/O supply • LBO pin for Linear or Interleave Burst mode • Pin compatible with 4Mb, 9Mb, 18Mb and 36Mb devices • Byte write operation (9-bit Bytes) • 3 chip enable signals for easy depth expansion • ZZ Pin for automatic power-down • JEDEC-standard 100-lead TQFP package • RoHS-compliant 100-lead TQFP package available Functional Description The GS8640FZ18/36T-xxxV is a 72Mbit Synchronous Static SRAM. GSI's NBT SRAMs, like ZBT, NtRAM, NoBL or other flow through read/single late write SRAMs, allow utilization of all available bus bandwidth by eliminating the need to insert deselect cycles when the device is switched from read to write cycles. Because it is a synchronous device, address, data inputs, and read/ write control inputs are captured on the rising edge of the input clock. Burst order control (LBO) must be tied to a power rail for proper operation. Asynchronous inputs include the Sleep mode enable (ZZ) and Output Enable. Output Enable can be used to override the synchronous control of the output drivers and turn the RAM's output drivers off at any time. Write cycles are internally self-timed and initiated by the rising edge of the clock input. This feature eliminates complex offchip write pulse generation required by asynchronous SRAMs and simplifies input signal timing. The GS8640FZ18/36T-xxxV is implemented with GSI's high performance CMOS technology and is available in a JEDECstandard 100-pin TQFP package. Parameter Synopsis Flow Through 2-1-1-1 Rev: 1.00a 2/2009 tKQ tCycle Curr (x18) Curr (x32/x36) -6.5 -7.5 -8.0 Unit 6.5 6.5 245 280 7.5 7.5 220 250 8.0 8.0 210 240 ns ns mA mA 1/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV A A E1 E2 NC NC BB BA E3 VDD VSS CK W CKE G ADV A A A A GS8640FZ18T-xxxV Pinout (Package T) NC NC NC VDDQ A NC NC VDDQ VSS NC DQPA DQA DQA VSS VDDQ DQA DQA VSS NC VDD ZZ DQA DQA VDDQ VSS DQA DQA NC NC VSS VDDQ NC NC NC LBO A A A A A1 A0 NC NC VSS VDD A A A A A A A A A VSS NC NC DQB DQB VSS VDDQ DQB DQB NC VDD NC VSS DQB DQB VDDQ VSS DQB DQB DQPB NC VSS VDDQ NC NC NC 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 1 80 2 79 3 78 4 77 5 76 6 75 7 74 8 73 9 72 4M x 18 10 71 Top View 11 70 12 69 13 68 14 67 15 66 16 65 17 64 18 63 19 62 20 61 21 60 22 59 23 58 24 57 25 56 26 55 27 54 28 53 29 52 30 51 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Rev: 1.00a 2/2009 2/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV A A E1 E2 BD BC BB BA E3 VDD VSS CK W CKE G ADV A A A A GS8640FZ36T-xxxV Pinout (Package T) DQPC DQC DQC VDDQ DQPB DQB DQB VDDQ VSS DQB DQB DQB DQB VSS VDDQ DQB DQB VSS NC VDD ZZ DQA DQA VDDQ VSS DQA DQA DQA DQA VSS VDDQ DQA DQA DQPA LBO A A A A A1 A0 NC NC VSS VDD A A A A A A A A A VSS DQC DQC DQC DQC VSS VDDQ DQC DQC NC VDD NC VSS DQD DQD VDDQ VSS DQD DQD DQD DQD VSS VDDQ DQD DQD DQPD 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 1 80 2 79 3 78 4 77 5 76 6 75 7 74 8 73 9 72 2M x 36 10 71 Top View 11 70 12 69 13 68 14 67 15 66 16 65 17 64 18 63 19 62 20 61 21 60 22 59 23 58 24 57 25 56 26 55 27 54 28 53 29 52 30 51 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Rev: 1.00a 2/2009 3/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV TQFP Pin Descriptions Symbol Type Description A 0, A 1 In Burst Address Inputs; Preload the burst counter A In Address Inputs CK In Clock Input Signal BA In Byte Write signal for data inputs DQA1-DQA9; active low BB In Byte Write signal for data inputs DQB1-DQB9; active low BC In Byte Write signal for data inputs DQC1-DQC9; active low BD In Byte Write signal for data inputs DQD1-DQD9; active low W In Write Enable; active low E1 In Chip Enable; active low E2 In Chip Enable; Active High. For self decoded depth expansion E3 In Chip Enable; Active Low. For self decoded depth expansion G In Output Enable; active low ADV In Advance/Load; Burst address counter control pin CKE In Clock Input Buffer Enable; active low DQA I/O Byte A Data Input and Output pins DQB I/O Byte B Data Input and Output pins DQC I/O Byte C Data Input and Output pins DQD I/O Byte D Data Input and Output pins ZZ In Power down control; active high LBO In Linear Burst Order; active low VDD In Core power supply VSS In Ground VDDQ In Output driver power supply NC — No Connect Rev: 1.00a 2/2009 4/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Register 1 Register 2 K Write Data Write Data K D Q K NC DQa–DQn GS8640FZ18/36T-xxxV NBT SRAM Functional Block Diagram Memory Array Sense Amps FT Register 2 Register 1 Control Logic 5/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. G CKE CK E3 E2 E1 BD BC BB BA W LBO ADV A0–An K K Data Coherency Match Read, Write and K Write Address Write Address K K D Q SA1 SA0 Burst Counter SA1’ SA0’ Write Drivers Rev: 1.00a 2/2009 © 2007, GSI Technology GS8640FZ18/36T-xxxV Functional Details Clocking Deassertion of the Clock Enable (CKE) input blocks the Clock input from reaching the RAM's internal circuits. It may be used to suspend RAM operations. Failure to observe Clock Enable set-up or hold requirements will result in erratic operation. Flow Through Mode Read and Write Operations Operation of the RAM in Flow Through mode is very similar to operations in Pipeline mode. Activation of a Read Cycle and the use of the Burst Address Counter is identical. In Flow Through mode the device may begin driving out new data immediately after new address are clocked into the RAM, rather than holding new data until the following (second) clock edge. Therefore, in Flow Through mode the read pipeline is one cycle shorter than in Pipeline mode. Function W BA BB BC BD Read H X X X X Write Byte “a” L L H H H Write Byte “b” L H L H H Write Byte “c” L H H L H Write Byte “d” L H H H L Write all Bytes L L L L L Write Abort/NOP L H H H H Write operations are initiated in the same way, but differ in that the write pipeline is one cycle shorter as well, preserving the ability to turn the bus from reads to writes without inserting any dead cycles. While the pipelined NBT RAMs implement a double late write protocol, in Flow Through mode a single late write protocol mode is observed. Therefore, in Flow Through mode, address and control are registered on the first rising edge of clock and data in is required at the data input pins at the second rising edge of clock. Rev: 1.00a 2/2009 6/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Synchronous Truth Table Operation Type Address CK CKE ADV W Bx E1 E2 E3 G ZZ DQ Notes Read Cycle, Begin Burst R External L-H L L H X L H L L L Q Read Cycle, Continue Burst B Next L-H L H X X X X X L L Q 1,10 NOP/Read, Begin Burst R External L-H L L H X L H L H L High-Z 2 Dummy Read, Continue Burst B Next L-H L H X X X X X H L High-Z 1,2,10 Write Cycle, Begin Burst W External L-H L L L L L H L X L D 3 Write Abort, Begin Burst D None L-H L L L H L H L X L High-Z 1 Write Cycle, Continue Burst B Next L-H L H X L X X X X L D 1,3,10 Write Abort, Continue Burst B Next L-H L H X H X X X X L High-Z 1,2,3,10 Deselect Cycle, Power Down D None L-H L L X X H X X X L High-Z Deselect Cycle, Power Down D None L-H L L X X X X H X L High-Z Deselect Cycle, Power Down D None L-H L L X X X L X X L High-Z Deselect Cycle, Continue D None L-H L H X X X X X X L High-Z None X X X X X X X X X H High-Z Current L-H H X X X X X X X L - Sleep Mode Clock Edge Ignore, Stall 1 4 Notes: 1. Continue Burst cycles, whether read or write, use the same control inputs. A Deselect continue cycle can only be entered into if a Deselect cycle is executed first. 2. Dummy Read and Write abort can be considered NOPs because the SRAM performs no operation. A Write abort occurs when the W pin is sampled low but no Byte Write pins are active so no write operation is performed. 3. G can be wired low to minimize the number of control signals provided to the SRAM. Output drivers will automatically turn off during write cycles. 4. If CKE High occurs during a pipelined read cycle, the DQ bus will remain active (Low Z). If CKE High occurs during a write cycle, the bus will remain in High Z. 5. X = Don’t Care; H = Logic High; L = Logic Low; Bx = High = All Byte Write signals are high; Bx = Low = One or more Byte/Write signals are Low 6. All inputs, except G and ZZ must meet setup and hold times of rising clock edge. 7. Wait states can be inserted by setting CKE high. 8. This device contains circuitry that ensures all outputs are in High Z during power-up. 9. A 2-bit burst counter is incorporated. 10. The address counter is incriminated for all Burst continue cycles. Rev: 1.00a 2/2009 7/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Flow Through Mode Data I/O State Diagram B W R B R High Z (Data In) Data Out (Q Valid) W D D W R High Z B D Key Notes Input Command Code 1. The Hold command (CKE Low) is not shown because it prevents any state change. ƒ Transition Current State (n) 2. W, R, B and D represent input command codes as indicated in the Truth Tables. Next State (n+1) n n+1 n+2 n+3 Clock (CK) Command ƒ Current State ƒ ƒ ƒ Next State Current State and Next State Definition for: Pipeline and Flow Through Read Write Control State Diagram Rev: 1.00a 2/2009 8/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Burst Cycles Although NBT RAMs are designed to sustain 100% bus bandwidth by eliminating turnaround cycle when there is transition from read to write, multiple back-to-back reads or writes may also be performed. NBT SRAMs provide an on-chip burst address generator that can be utilized, if desired, to further simplify burst read or write implementations. The ADV control pin, when driven high, commands the SRAM to advance the internal address counter and use the counter generated address to read or write the SRAM. The starting address for the first cycle in a burst cycle series is loaded into the SRAM by driving the ADV pin low, into Load mode. Burst Order The burst address counter wraps around to its initial state after four addresses (the loaded address and three more) have been accessed. The burst sequence is determined by the state of the Linear Burst Order pin (LBO). When this pin is low, a linear burst sequence is selected. When the RAM is installed with the LBO pin tied high, Interleaved burst sequence is selected. See the tables below for details. Mode Pin Functions Mode Name Pin Name Burst Order Control LBO Power Down Control ZZ State Function L Linear Burst H Interleaved Burst L or NC Active H Standby, IDD = ISB Note: There is a pull-down device on the ZZ pin, so this input pin can be unconnected and the chip will operate in the default states as specified in the above tables. Burst Counter Sequences Linear Burst Sequence Interleaved Burst Sequence A[1:0] A[1:0] A[1:0] A[1:0] A[1:0] A[1:0] A[1:0] A[1:0] 1st address 00 01 10 11 1st address 00 01 10 11 2nd address 01 10 11 00 2nd address 01 00 11 10 3rd address 10 11 00 01 3rd address 10 11 00 01 4th address 11 00 01 10 4th address 11 10 01 00 Note: The burst counter wraps to initial state on the 5th clock. Note: The burst counter wraps to initial state on the 5th clock. BPR 1999.05.18 Rev: 1.00a 2/2009 9/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Sleep Mode During normal operation, ZZ must be pulled low, either by the user or by it’s internal pull down resistor. When ZZ is pulled 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 normally after 2 cycles of wake up time. Sleep mode is a low current, power-down mode in which the device is deselected and current is reduced to ISB2. The duration of Sleep mode is dictated by the length of time the ZZ is in a high state. After entering Sleep mode, all inputs except ZZ become disabled and all outputs go to High-Z The ZZ pin is an asynchronous, active high input that causes the device to enter Sleep mode. When the ZZ pin is driven high, ISB2 is guaranteed after the time tZZI is met. Because ZZ is an asynchronous input, pending operations or operations in progress may not be properly completed if ZZ is asserted. Therefore, Sleep mode must not be initiated until valid pending operations are completed. Similarly, when exiting Sleep mode during tZZR, only a deselect or read commands may be applied while the SRAM is recovering from Sleep mode. Sleep Mode Timing Diagram tKH tKC tKL CK tZZR tZZS tZZH ZZ Rev: 1.00a 2/2009 10/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Absolute Maximum Ratings (All voltages reference to VSS) Symbol Description Value Unit VDD Voltage on VDD Pins –0.5 to 4.6 V VDDQ Voltage on VDDQ Pins –0.5 to VDD V VI/O Voltage on I/O Pins –0.5 to VDDQ +0.5 ( 4.6 V max.) V VIN Voltage on Other Input Pins –0.5 to VDD +0.5 ( 4.6 V max.) V IIN Input Current on Any Pin +/–20 mA IOUT Output Current on Any I/O Pin +/–20 mA PD Package Power Dissipation 1.5 W TSTG Storage Temperature –55 to 125 o TBIAS Temperature Under Bias –55 to 125 o C C Note: Permanent damage to the device may occur if the Absolute Maximum Ratings are exceeded. Operation should be restricted to Recommended Operating Conditions. Exposure to conditions exceeding the Absolute Maximum Ratings, for an extended period of time, may affect reliability of this component. Power Supply Voltage Ranges (1.8 V/2.5 V Version) Parameter Symbol Min. Typ. Max. Unit 1.8 V Supply Voltage VDD1 1.7 1.8 2.0 V 2.5 V Supply Voltage VDD2 2.3 2.5 2.7 V 1.8 V VDDQ I/O Supply Voltage VDDQ1 1.7 1.8 VDD V 2.5 V VDDQ I/O Supply Voltage VDDQ2 2.3 2.5 VDD V Notes Notes: 1. The part numbers of Industrial Temperature Range versions end the character “I”. Unless otherwise noted, all performance specifications quoted are evaluated for worst case in the temperature range marked on the device. 2. Input Under/overshoot voltage must be –2 V > Vi < VDDn+2 V not to exceed 4.6 V maximum, with a pulse width not to exceed 20% tKC. Rev: 1.00a 2/2009 11/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV VDDQ2 & VDDQ1 Range Logic Levels Parameter Symbol Min. Typ. Max. Unit Notes VDD Input High Voltage VIH 0.6*VDD — VDD + 0.3 V 1 VDD Input Low Voltage VIL –0.3 — 0.3*VDD V 1 Notes: 1. The part numbers of Industrial Temperature Range versions end the character “I”. Unless otherwise noted, all performance specifications quoted are evaluated for worst case in the temperature range marked on the device. 2. Input Under/overshoot voltage must be –2 V > Vi < VDDn+2 V not to exceed 4.6 V maximum, with a pulse width not to exceed 20% tKC. Recommended Operating Temperatures Parameter Symbol Min. Typ. Max. Unit Notes Ambient Temperature (Commercial Range Versions) TA 0 25 70 C 2 Ambient Temperature (Industrial Range Versions) TA –40 25 85 C 2 Notes: 1. The part numbers of Industrial Temperature Range versions end the character “I”. Unless otherwise noted, all performance specifications quoted are evaluated for worst case in the temperature range marked on the device. 2. Input Under/overshoot voltage must be –2 V > Vi < VDDn+2 V not to exceed 4.6 V maximum, with a pulse width not to exceed 20% tKC. Undershoot Measurement and Timing Overshoot Measurement and Timing VIH 20% tKC VDD + 2.0 V VSS 50% 50% VDD VSS – 2.0 V 20% tKC VIL Capacitance (TA = 25oC, f = 1 MHZ, VDD = 2.5 V) Parameter Symbol Test conditions Typ. Max. Unit Input Capacitance CIN VIN = 0 V 8 10 pF Input/Output Capacitance CI/O VOUT = 0 V 12 14 pF Note: These parameters are sample tested. Rev: 1.00a 2/2009 12/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV AC Test Conditions Parameter Conditions Input high level VDD – 0.2 V Input low level 0.2 V Input slew rate 1 V/ns Input reference level VDD/2 Output reference level VDDQ/2 Output load Fig. 1 Figure 1 Output Load 1 DQ 30pF* 50 Notes: 1. Include scope and jig capacitance. 2. Test conditions as specified with output loading as shown in Fig. 1 unless otherwise noted. 3. Device is deselected as defined by the Truth Table. VDDQ/2 * Distributed Test Jig Capacitance DC Electrical Characteristics Parameter Symbol Test Conditions Min Max Input Leakage Current (except mode pins) IIL VIN = 0 to VDD –1 uA 1 uA FT, ZZ Input Current IIN VDD VIN 0 V –100 uA 100 uA Output Leakage Current IOL Output Disable, VOUT = 0 to VDD –1 uA 1 uA DC Output Characteristics (1.8 V/2.5 V Version) Parameter Symbol Test Conditions Min Max 1.8 V Output High Voltage VOH1 IOH = –4 mA, VDDQ = 1.7 V VDDQ – 0.4 V — 2.5 V Output High Voltage VOH2 IOH = –8 mA, VDDQ = 2.375 V 1.7 V — 1.8 V Output Low Voltage VOL1 IOL = 4 mA — 0.4 V 2.5 V Output Low Voltage VOL2 IOL = 8 mA — 0.4 V Rev: 1.00a 2/2009 13/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Operating Currents -6.5 Parameter Test Conditions Operating Current Device Selected; All other inputs VIH or VIL Output open Mode -7.5 -8.0 Symbol 0 to 70°C –40 to 85°C 0 to 70°C –40 to 85°C 0 to 70°C –40 to 85°C IDD 255 25 275 25 230 20 250 20 220 20 240 20 mA Unit (x32/ x36) Flow Through (x18) Flow Through IDDQ 230 15 250 15 205 15 225 15 195 15 215 15 mA IDDQ IDD Standby Current ZZ VDD – 0.2 V Flow Through ISB 100 120 100 120 100 120 mA Deselect Current Device Deselected; All other inputs VIH or VIL Flow Through IDD 125 140 120 135 120 135 mA Notes: 1. IDD and IDDQ apply to any combination of VDD and VDDQ operation. 2. All parameters listed are worst case scenario. Rev: 1.00a 2/2009 14/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV AC Electrical Characteristics Flow Through Parameter Symbol Clock Cycle Time -6.5 -7.5 -8 Unit Min Max Min Max Min Max tKC 6.5 — 7.5 — 8.0 — ns Clock to Output Valid tKQ — 6.5 — 7.5 — 8.0 ns Clock to Output Invalid tKQX 3.0 — 3.0 — 3.0 — ns Clock to Output in Low-Z tLZ1 3.0 — 3.0 — 3.0 — ns Setup time tS 1.5 — 1.5 — 1.5 — ns Hold time tH 0.5 — 0.5 — 0.5 — ns Clock HIGH Time tKH 1.3 — 1.3 — 1.3 — ns Clock LOW Time tKL 1.7 — 1.7 — 1.7 — ns Clock to Output in High-Z tHZ1 1.5 2.5 1.5 3.0 1.5 3.0 ns G to Output Valid tOE — 2.5 — 3.0 — 3.5 ns 1 G to output in Low-Z tOLZ 0 — 0 — 0 — ns G to output in High-Z tOHZ1 — 2.5 — 3.0 — 3.0 ns ZZ setup time tZZS2 5 — 5 — 5 — ns ZZ hold time tZZH2 1 — 1 — 1 — ns ZZ recovery tZZR 20 — 20 — 20 — ns Notes: 1. These parameters are sampled and are not 100% tested. 2. ZZ is an asynchronous signal. However, in order to be recognized on any given clock cycle, ZZ must meet the specified setup and hold times as specified above. Rev: 1.00a 2/2009 15/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Flow Through Mode Timing (NBT) Begin Read A Cont Cont Write B Read C Read C+1 Read C+2 Read C+3 Read C Cont Deselect tKL tKH tKC CK ADSP Fixed High tS tH tS tH ADSC initiated read ADSC tS tH ADV tS tH A0–An A B C tS tH GW tS tH BW tS tH Ba–Bd tS Deselected with E1 tH E1 tS tH E2 and E3 only sampled with ADSC E2 tS tH E3 G tH tS tOE DQa–DQd Rev: 1.00a 2/2009 tOHZ Q(A) D(B) tKQ tLZ tHZ tKQX Q(C) Q(C+1) Q(C+2) 16/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. Q(C+3) Q(C) © 2007, GSI Technology GS8640FZ18/36T-xxxV TQFP Package Drawing (Package T) L Min. Nom. Max A1 Standoff 0.05 0.10 0.15 A2 Body Thickness 1.35 1.40 1.45 b Lead Width 0.20 0.30 0.40 c Lead Thickness 0.09 — 0.20 D Terminal Dimension 21.9 22.0 22.1 D1 Package Body 19.9 20.0 20.1 E Terminal Dimension 15.9 16.0 16.1 E1 Package Body 13.9 14.0 14.1 e Lead Pitch — 0.65 — L Foot Length 0.45 0.60 0.75 L1 Lead Length — 1.00 — Y Coplanarity Lead Angle e D D1 Description c Pin 1 Symbol L1 b A1 A2 0.10 Y 0 — 7 E1 E Notes: 1. All dimensions are in millimeters (mm). 2. Package width and length do not include mold protrusion. Rev: 1.00a 2/2009 17/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV Ordering Information—GSI NBT Synchronous SRAM Org Part Number1 Type Voltage Option Package Speed2 (MHz/ns) TA3 Status4 4M x 18 GS8640FZ18T-6.5V NBT 1.8 V or 2.5 V TQFP 6.5 C PQ 4M x 18 GS8640FZ18T-7.5V NBT 1.8 V or 2.5 V TQFP 7.5 C PQ 4M x 18 GS8640FZ18T-8V NBT 1.8 V or 2.5 V TQFP 8 C PQ 2M x 36 GS8640FZ36T-6.5V NBT 1.8 V or 2.5 V TQFP 6.5 C PQ 2M x 36 GS8640FZ36T-7.5V NBT 1.8 V or 2.5 V TQFP 7.5 C PQ 2M x 36 GS8640FZ36T-8V NBT 1.8 V or 2.5 V TQFP 8 C PQ 4M x 18 GS8640FZ18T-6.5IV NBT 1.8 V or 2.5 V TQFP 6.5 I PQ 4M x 18 GS8640FZ18T-7.5IV NBT 1.8 V or 2.5 V TQFP 7.5 I PQ 4M x 18 GS8640FZ18T-8IV NBT 1.8 V or 2.5 V TQFP 8 I PQ 2M x 36 GS8640FZ36T-6.5IV NBT 1.8 V or 2.5 V TQFP 6.5 I PQ 2M x 36 GS8640FZ36T-7.5IV NBT 1.8 V or 2.5 V TQFP 7.5 I PQ 2M x 36 GS8640FZ36T-8IV NBT 1.8 V or 2.5 V TQFP 8 I PQ 4M x 18 GS8640FZ18GT-6.5V NBT 1.8 V or 2.5 V RoHS-compliant TQFP 6.5 C PQ 4M x 18 GS8640FZ18GT-7.5V NBT 1.8 V or 2.5 V RoHS-compliant TQFP 7.5 C PQ 4M x 18 GS8640FZ18GT-8V NBT 1.8 V or 2.5 V RoHS-compliant TQFP 8 C PQ 2M x 36 GS8640FZ36GT-6.5V NBT 1.8 V or 2.5 V RoHS-compliant TQFP 6.5 C PQ 2M x 36 GS8640FZ36GT-7.5V NBT 1.8 V or 2.5 V RoHS-compliant TQFP 7.5 C PQ 2M x 36 GS8640FZ36GT-8V NBT 1.8 V or 2.5 V RoHS-compliant TQFP 8 C PQ 4M x 18 GS8640FZ18GT-6.5IV NBT 1.8 V or 2.5 V RoHS-compliant TQFP 6.5 I PQ 4M x 18 GS8640FZ18GT-7.5IV NBT 1.8 V or 2.5 V RoHS-compliant TQFP 7.5 I PQ 4M x 18 GS8640FZ18GT-8IV NBT 1.8 V or 2.5 V RoHS-compliant TQFP 8 I PQ 2M x 36 GS8640FZ36GT-6.5IV NBT 1.8 V or 2.5 V RoHS-compliant TQFP 6.5 I PQ 2M x 36 GS8640FZ36GT-7.5IV NBT 1.8 V or 2.5 V RoHS-compliant TQFP 7.5 I PQ 2M x 36 GS8640FZ36GT-8IV NBT 1.8 V or 2.5 V RoHS-compliant TQFP 8 I PQ Notes: 1. Customers requiring delivery in Tape and Reel should add the character “T” to the end of the part number. Example: GS8640FZ36T-8IVT. 2. The speed column indicates the latency (ns) in Flow Through mode. 3. TA = C = Commercial Temperature Range. TA = I = Industrial Temperature Range. 4. PQ = Pre-Qualification. 5. GSI offers other versions this type of device in many different configurations and with a variety of different features, only some of which are covered in this data sheet. See the GSI Technology web site (www.gsitechnology.com) for a complete listing of current offerings Rev: 1.00a 2/2009 18/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology GS8640FZ18/36T-xxxV 72Mb Sync SRAM Datasheet Revision History DS/DateRev. Code: Old; New Types of Changes Format or Content • Creation of new datasheet 8640FZVxx_r1 8640FZVxx_r1.00a Rev: 1.00a 2/2009 Page;Revisions;Reason Content • Removed “Preliminary” banner due to MP status 19/19 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. © 2007, GSI Technology