CY7C1352F

CY7C1352F 4-Mbit (256Kx18) Pipelined SRAM with NoBL™ Architecture Features • Pin compatible and functionally equivalent to ZBT™ devices • Internally self-timed output buffer control to eliminate the need to use OE • Byte Write capability • 256K x 18 common I/O architecture • Single 3.3V power supply • 2.5V / 3.3V I/O Operation • Fast clock-to-output times — 2.6 ns (for 250-MHz device) — 2.6 ns (for 225-MHz device) — 2.8 ns (for 200-MHz device) — 3.5 ns (for 166-MHz device) — 4.0 ns (for 133-MHz device) — 4.5 ns (for 100-MHz device) • Clock Enable (CEN) pin to suspend operation • Synchronous self-timed writes • Asynchronous output enable (OE) • JEDEC-standard 100 TQFP package • Burst Capability—linear or interleaved burst order • “ZZ” Sleep Mode Option and Stop Clock option Functional Description[1] The CY7C1352F is a 3.3V, 256K x 18 synchronous-pipelined Burst SRAM designed specifically to support unlimited true back-to-back Read/Write operations without the insertion of wait states. The CY7C1352F is equipped with the advanced No Bus Latency™ (NoBL™) logic required to enable consecutive Read/Write operations with data being transferred on every clock cycle. This feature dramatically improves the throughput of the SRAM, especially in systems that require frequent Write/Read transitions. All synchronous inputs pass through input registers controlled by the rising edge of the clock. All data outputs pass through output registers controlled by the rising edge of the clock. The clock input is qualified by the Clock Enable (CEN) signal, which, when deasserted, suspends operation and extends the previous clock cycle. Maximum access delay from the clock rise is 2.8 ns (200-MHz device) Write operations are controlled by the two Byte Write Select (BW[A:B]) and a Write Enable (WE) input. All writes are conducted with on-chip synchronous self-timed write circuitry. Three synchronous Chip Enables (CE1, CE2, CE3) and an asynchronous Output Enable (OE) provide for easy bank selection and output three-state control. In order to avoid bus contention, the output drivers are synchronously three-stated during the data portion of a write sequence. Logic Block Diagram A0, A1, A MODE CLK CEN ADDRESS REGISTER 0 A1 A1' D1 Q1 A0 A0' BURST D0 Q0 LOGIC ADV/LD C WRITE ADDRESS REGISTER 1 WRITE ADDRESS REGISTER 2 C ADV/LD BWA BWB WE WRITE REGISTRY AND DATA COHERENCY CONTROL LOGIC WRITE DRIVERS MEMORY ARRAY S E N S E A M P S O U T P U T R E G I S T E R S D A T A S T E E R I N G O U T P U T B U F F E R S DQs DQPA DQPB E E INPUT REGISTER 1 E INPUT REGISTER 0 E OE CE1 CE2 CE3 ZZ READ LOGIC Sleep Control Note: 1. For best–practices recommendations, please refer to the Cypress application note System Design Guidelines on www.cypress.com. Cypress Semiconductor Corporation Document #: 38-05211 Rev. *C • 3901 North First Street • San Jose, CA 95134 • 408-943-2600 Revised April 16, 2004 CY7C1352F Selection Guide Maximum Access Time Maximum Operating Current Maximum CMOS Standby Current 250 MHz 2.6 325 40 225 MHz 2.6 290 40 200 MHz 2.8 265 40 166 MHz 3.5 240 40 133 MHz 4.0 225 40 100 MHz 4.5 205 40 Unit ns mA mA Shaded area contains advance information. Please contact your local Cypress sales representative for availability of these parts. Pin Configuration 100-Pin TQFP ADV/LD BWB BWA CE1 CE2 CE3 VDD VSS CEN CLK WE NC NC NC OE A A NC A 82 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 NC NC NC VDDQ VSS NC NC DQB DQB VSS VDDQ DQB DQB NC BYTE B VDD NC VSS DQB DQB VDDQ VSS DQB DQB DQPB NC VSS VDDQ NC NC NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 100 81 80 79 78 77 76 75 74 73 72 71 70 A 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 BYTE A CY7C1352F 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 A 49 A MODE VSS VDD NC NC NC A1 A0 NC A A A A A A A Document #: 38-05211 Rev. *C A A 50 Page 2 of 13 CY7C1352F Pin Definitions Name A0, A1, A TQFP 37,36,32, 33,34,35, 44,45,46, 47,48,49, 50,80,81, 82,99,100 93,94 88 85 I/O InputSynchronous Description Address Inputs used to select one of the 256K address locations. Sampled at the rising edge of the CLK. A[1:0] are fed to the two-bit burst counter. BW[A:B] WE ADV/LD InputSynchronous InputSynchronous InputSynchronous Byte Write Inputs, active LOW. Qualified with WE to conduct writes to the SRAM. Sampled on the rising edge of CLK. Write Enable Input, active LOW. Sampled on the rising edge of CLK if CEN is active LOW. This signal must be asserted LOW to initiate a write sequence. Advance/Load Input. Used to advance the on-chip address counter or load a new address. When HIGH (and CEN is asserted LOW) the internal burst counter is advanced. When LOW, a new address can be loaded into the device for an access. After being deselected, ADV/LD should be driven LOW in order to load a new address. Clock Input. Used to capture all synchronous inputs to the device. CLK is qualified with CEN. CLK is only recognized if CEN is active LOW. Chip Enable 1 Input, active LOW. Sampled on the rising edge of CLK. Used in conjunction with CE2 and CE3 to select/deselect the device. Chip Enable 2 Input, active HIGH. Sampled on the rising edge of CLK. Used in conjunction with CE1 and CE3 to select/deselect the device. Chip Enable 3 Input, active LOW. Sampled on the rising edge of CLK. Used in conjunction with CE1 and CE2 to select/deselect the device. Output Enable, asynchronous input, active LOW. Combined with the synchronous logic block inside the device to control the direction of the I/O pins. When LOW, the DQ pins are allowed to behave as outputs. When deasserted HIGH, DQ pins are three-stated, and act as input data pins. OE is masked during the data portion of a write sequence, during the first clock when emerging from a deselected state, when the device has been deselected. Clock Enable Input, active LOW. When asserted LOW the Clock signal is recognized by the SRAM. When deasserted HIGH the Clock signal is masked. Since deasserting CEN does not deselect the device, CEN can be used to extend the previous cycle when required. ZZ “sleep” Input. This active HIGH input places the device in a non-time-critical “sleep” condition with data integrity preserved. For normal operation, this pin has to be LOW or left floating. ZZ pin has an internal pull-down. Bidirectional Data I/O Lines. As inputs, they feed into an on-chip data register that is triggered by the rising edge of CLK. As outputs, they deliver the data contained in the memory location specified by the address during the clock rise of the read cycle. The direction of the pins is controlled by OE and the internal control logic. When OE is asserted LOW, the pins can behave as outputs. When HIGH, DQs and DQP[A:B] are placed in a three-state condition. The outputs are automatically three-stated during the data portion of a write sequence, during the first clock when emerging from a deselected state, and when the device is deselected, regardless of the state of OE. Bidirectional Data Parity I/O Lines. Functionally, these signals are identical to DQs. During write sequences, DQP[A:B] is controlled by BW[A:B] correspondingly. Mode Input. Selects the burst order of the device. When tied to Gnd selects linear burst sequence. When tied to VDD or left floating selects interleaved burst sequence. Power supply inputs to the core of the device. Power supply for the I/O circuitry. CLK CE1 CE2 CE3 OE 89 98 97 92 86 Input-Clock InputSynchronous InputSynchronous InputSynchronous InputAsynchronous CEN 87 InputSynchronous ZZ 64 InputAsynchronous I/OSynchronous DQs 58,59,62, 63,68,69, 72,73, 8,9,12,13, 18,19,22, 23 DQP[A:B] MODE 74,24 31 I/OSynchronous Input Strap pin Power Supply I/O Power Supply VDD VDDQ 15,41,65, 91 4,11,20,27,54,6 1,70, 77 Document #: 38-05211 Rev. *C Page 3 of 13 CY7C1352F Pin Definitions (continued) Name VSS TQFP 5,10,17,21,26,4 0,55, 60,67,71, 76,90 1,2,3,6,7, 14,16,25, 28,29,30, 38,39,42, 43,51,52, 53,56,57, 66,75,78, 79,83,84, 95,96 I/O Ground Ground for the device. Description NC No Connects. Not internally connected to the die. Functional Overview The CY7C1352F is a synchronous-pipelined Burst SRAM designed specifically to eliminate wait states during Write/Read transitions. All synchronous inputs pass through input registers controlled by the rising edge of the clock. The clock signal is qualified with the Clock Enable input signal (CEN). If CEN is HIGH, the clock signal is not recognized and all internal states are maintained. All synchronous operations are qualified with CEN. All data outputs pass through output registers controlled by the rising edge of the clock. Maximum access delay from the clock rise (tCO) is 2.8 ns (200-MHz device). Accesses can be initiated by asserting all three Chip Enables (CE1, CE2, CE3) active at the rising edge of the clock. If Clock Enable (CEN) is active LOW and ADV/LD is asserted LOW, the address presented to the device will be latched. The access can either be a read or write operation, depending on the status of the Write Enable (WE). BW[A:B] can be used to conduct byte write operations. Write operations are qualified by the Write Enable (WE). All writes are simplified with on-chip synchronous self-timed write circuitry. Three synchronous Chip Enables (CE1, CE2, CE3) and an asynchronous Output Enable (OE) simplify depth expansion. All operations (Reads, Writes, and Deselects) are pipelined. ADV/LD should be driven LOW once the device has been deselected in order to load a new address for the next operation. Single Read Accesses A read access is initiated when the following conditions are satisfied at clock rise: (1) CEN is asserted LOW, (2) CE1, CE2, and CE3 are ALL asserted active, (3) the Write Enable input signal WE is deasserted HIGH, and (4) ADV/LD is asserted LOW. The address presented to the address inputs is latched into the Address Register and presented to the memory core and control logic. The control logic determines that a read access is in progress and allows the requested data to propagate to the input of the output register. At the rising edge of the next clock the requested data is allowed to propagate through the output register and onto the data bus, provided OE is active LOW. After the first clock of the read access the output buffers are controlled by OE and the internal control logic. OE must be driven LOW in order for the device to drive out the requested data. During the second clock, a subsequent Document #: 38-05211 Rev. *C operation (Read/Write/Deselect) can be initiated. Deselecting the device is also pipelined. Therefore, when the SRAM is deselected at clock rise by one of the chip enable signals, its output will three-state following the next clock rise. Burst Read Accesses The CY7C1352F has an on-chip burst counter that allows the user the ability to supply a single address and conduct up to four Reads without reasserting the address inputs. ADV/LD must be driven LOW in order to load a new address into the SRAM, as described in the Single Read Access section above. The sequence of the burst counter is determined by the MODE input signal. A LOW input on MODE selects a linear burst mode, a HIGH selects an interleaved burst sequence. Both burst counters use A0 and A1 in the burst sequence, and will wrap-around when incremented sufficiently. A HIGH input on ADV/LD will increment the internal burst counter regardless of the state of chip enables inputs or WE. WE is latched at the beginning of a burst cycle. Therefore, the type of access (Read or Write) is maintained throughout the burst sequence. Single Write Accesses Write accesses are initiated when the following conditions are satisfied at clock rise: (1) CEN is asserted LOW, (2) CE1, CE2, and CE3 are ALL asserted active, and (3) the write signal WE is asserted LOW. The address presented to the address inputs is loaded into the Address Register. The write signals are latched into the Control Logic block. On the subsequent clock rise the data lines are automatically three-stated regardless of the state of the OE input signal. This allows the external logic to present the data on DQs and DQP[A:B]. In addition, the address for the subsequent access (Read/Write/Deselect) is latched into the Address Register (provided the appropriate control signals are asserted). On the next clock rise the data presented to DQs and DQP[A:B] (or a subset for byte write operations, see Write Cycle Description table for details) inputs is latched into the device and the write is complete. The data written during the Write operation is controlled by BW[A:B] signals. The CY7C1352F provides byte write capability that is described in the Write Cycle Description table. Asserting the Write Enable input (WE) with the selected Byte Write Select (BW[A:B]) input will selectively write to only the desired bytes. Bytes not selected during a byte write operation will remain unaltered. A synchronous self-timed write Page 4 of 13 CY7C1352F mechanism has been provided to simplify the write operations. Byte write capability has been included in order to greatly simplify Read/Modify/Write sequences, which can be reduced to simple byte write operations. Because the CY7C1352F is a common I/O device, data should not be driven into the device while the outputs are active. The Output Enable (OE) can be deasserted HIGH before presenting data to the DQs and DQP[A:B] inputs. Doing so will three-state the output drivers. As a safety precaution, DQs and DQP[A:B] are automatically three-stated during the data portion of a write cycle, regardless of the state of OE. Burst Write Accesses The CY7C1352F has an on-chip burst counter that allows the user the ability to supply a single address and conduct up to four Write operations without reasserting the address inputs. ADV/LD must be driven LOW in order to load the initial address, as described in the Single Write Access section above. When ADV/LD is driven HIGH on the subsequent clock rise, the chip enables (CE1, CE2, and CE3) and WE inputs are ignored and the burst counter is incremented. The correct BW[A:B] inputs must be driven in each cycle of the burst write in order to write the correct bytes of data. Sleep Mode The ZZ input pin is an asynchronous input. Asserting ZZ places the SRAM in a power conservation “sleep” mode. Two clock cycles are required to enter into or exit from this “sleep” mode. While in this mode, data integrity is guaranteed. Accesses pending when entering the “sleep” mode are not considered valid nor is the completion of the operation guaranteed. The device must be deselected prior to entering the “sleep” mode. CE1, CE2, and CE3, must remain inactive for the duration of tZZREC after the ZZ input returns LOW. Interleaved Burst Address Table (MODE = Floating or VDD) First Address A1, A0 00 01 10 11 Second Address A1, A0 01 00 11 10 Third Address A1, A0 10 11 00 01 Fourth Address A1, A0 11 10 01 00 Linear Burst Address Table (MODE = GND) First Address A1, A0 00 01 10 11 Second Address A1, A0 01 10 11 00 Third Address A1, A0 10 11 00 01 Fourth Address A1, A0 11 00 01 10 Truth Table [2, 3, 4, 5, 6, 7, 8] Operation Deselect Cycle Continue Deselect Cycle Read Cycle (Begin Burst) Read Cycle (Continue Burst) NOP/Dummy Read (Begin Burst) Dummy Read (Continue Burst) Write Cycle (Begin Burst) Write Cycle (Continue Burst) NOP/WRITE ABORT (Begin Burst) Address Used None None External Next External Next External Next None CE H X L X L X L X L ZZ L L L L L L L L L ADV/LD L H L H L H L H L WE X X H X H X L X L BWx X X X X X X L L H X X L L H H X X X OE L L L L L L L L L CEN CLK L-H L-H L-H L-H L-H L-H L-H L-H L-H DQ three-state three-state Data Out (Q) Data Out (Q) three-state three-state Data In (D) Data In (D) three-state Notes: 2. X=”Don't Care.” H= Logic HIGH, L =Logic LOW. CE stands for ALL Chip Enables active. BWX = 0 signifies at least one Byte Write Select is active, BWX = Valid signifies that the desired byte write selects are asserted, see Write Cycle Description table for details. 3. Write is defined by BW[A:B], and WE. See Write Cycle Descriptions table. 4. When a write cycle is detected, all I/Os are three-stated, even during byte writes. 5. The DQ and DQP pins are controlled by the current cycle and the OE signal. OE is asynchronous and is not sampled with the clock. 6. CEN = H, inserts wait states. 7. Device will power-up deselected and the I/Os in a three-state condition, regardless of OE. 8. OE is asynchronous and is not sampled with the clock rise. It is masked internally during write cycles. During a read cycle DQs and DQP[A:B] = Three-state when OE is inactive or when the device is deselected, and DQs and DQP[A:B] = data when OE is active. Document #: 38-05211 Rev. *C Page 5 of 13 CY7C1352F Truth Table [2, 3, 4, 5, 6, 7, 8] (continued) Operation WRITE ABORT (Continue Burst) IGNORE CLOCK EDGE (Stall) SNOOZE MODE Address Used Next Current None CE X X X ZZ L L H ADV/LD H X X WE X X X BWx H X X X X X OE L H X CEN CLK L-H L-H X DQ three-state – three-state Truth Table for Read/Write [ 2, 3] Function Read Write − No bytes written Write Byte A − (DQA and DQPA) Write Byte B − (DQB and DQPB) Write All Bytes WE H L L L L BWB X H H L L BWA X H L H L ZZ Mode Electrical Characteristics Parameter IDDZZ tZZS tZZREC tZZI tRZZI Description Snooze mode standby current Device operation to ZZ ZZ recovery time ZZ active to snooze current ZZ inactive to exit snooze current Test Conditions ZZ > VDD − 0.2V ZZ > VDD − 0.2V ZZ < 0.2V This parameter is sampled This parameter is sampled 0 2tCYC 2tCYC Min. Max. 40 2tCYC Unit mA ns ns ns ns Document #: 38-05211 Rev. *C Page 6 of 13 CY7C1352F Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ..................................... −65°C to +150°C Ambient Temperature with Power Applied .................................................. −55°C to +125°C Supply Voltage on VDD Relative to GND .........−0.5V to +4.6V DC Voltage Applied to Outputs in three-state ............................................−0.5V to VDDQ + 0.5V DC Input Voltage ...................................... −0.5V to VDD + 0.5V Current into Outputs (LOW)......................................... 20 mA Static Discharge Voltage.......................................... > 2001V (per MIL-STD-883, Method 3015) Latch-up Current.................................................... > 200 mA Operating Range Range Com’l Ind’l Ambient Temperature (TA) 0°C to +70°C –40°C to +85°C VDD VDDQ 3.3V – 5%/+10% 2.5V –5% to VDD Electrical Characteristics Over the Operating Range[9, 10] Parameter VDD VDDQ VOH VOL VIH VIL IX Description Power Supply Voltage I/O Supply Voltage Output HIGH Voltage Output LOW Voltage Input HIGH Input LOW Voltage[9] Voltage[9] VDDQ = 3.3V, VDD = Min., IOH = –4.0 mA VDDQ = 2.5V, VDD = Min., IOH = –2.0 mA VDDQ = 3.3V, VDD = Min., IOL = 8.0 mA VDDQ = 2.5V, VDD = Min., IOL = 2.0 mA VDDQ = 3.3V VDDQ = 2.5V VDDQ = 3.3V VDDQ = 2.5V Input Load Current except ZZ and MODE GND ≤ VI ≤ VDDQ 2.0 1.7 –0.3 –0.3 −5 −30 5 −5 30 −5 4-ns cycle, 250 MHz 4.4-ns cycle, 225 MHz 5-ns cycle, 200 MHz 6-ns cycle, 166 MHz 7.5-ns cycle, 133 MHz 10-ns cycle, 100MHz 5 325 290 265 240 225 205 Test Conditions Min. 3.135 2.375 2.4 2.0 0.4 0.4 VDD + 0.3V VDD + 0.3V 0.8 0.7 5 Max. 3.6 VDD Unit V V V V V V V V V V µA µA µA µA µA µA mA mA mA mA mA mA Input Current of MODE Input = VSS Input = VDD Input Current of ZZ Input = VSS Input = VDD IOZ IDD Output Leakage Current VDD Operating Supply Current GND ≤ VI ≤ VDDQ, Output Disabled VDD = Max., IOUT = 0 mA, f = fMAX = 1/tCYC Document #: 38-05211 Rev. *C Page 7 of 13 CY7C1352F Electrical Characteristics Over the Operating Range[9, 10] (continued) Parameter ISB1 Description Automatic CE Power-Down Current—TTL Inputs Test Conditions VDD = Max, Device Deselected, VIN ≥ VIH or VIN ≤ VIL f = fMAX = 1/tCYC 4-ns cycle, 250 MHz 4.4-ns cycle, 225 MHz 5-ns cycle, 200 MHz 6-ns cycle, 166 MHz 7.5-ns cycle, 133 MHz 10-ns cycle, 100 MHz ISB2 ISB3 VDD = Max, Device Deselected, All speeds Automatic CE Power-down VIN ≤ 0.3V or VIN > VDDQ – 0.3V, f Current—CMOS Inputs = 0 Automatic CE VDD = Max, Device Deselected, or 4-ns cycle, 250 MHz Power-down VIN ≤ 0.3V or VIN > VDDQ – 0.3V 4.4-ns cycle, 225 MHz Current—CMOS Inputs f = fMAX = 1/tCYC 5-ns cycle, 200 MHz 6-ns cycle, 166 MHz 7.5-ns cycle, 133 MHz 10-ns cycle, 100 MHz ISB4 Automatic CE Power-down Current—TTL Inputs VDD = Max, Device Deselected, VIN ≥ VIH or VIN ≤ VIL, f = 0 All speeds Min. Max. 120 115 110 100 90 80 40 Unit mA mA mA mA mA mA mA 105 100 95 85 75 65 45 mA mA mA mA mA mA mA Shaded areas contain advance information. Thermal Resistance[11] Parameter ΘJA ΘJC Description Thermal Resistance (Junction to Ambient) Thermal Resistance (Junction to Case) Test Conditions Test conditions follow standard test methods and procedures for measuring thermal impedance, per EIA / JESD51. TQFP Package 41.83 9.99 Unit °C/W °C/W Capacitance[11] Parameter CIN CCLK CI/O Description Input Capacitance Clock Input Capacitance Input/Output Capacitance Test Conditions TA = 25°C, f = 1 MHz, VDD = 3.3V, VDDQ = 3.3V Max. 5 5 5 Unit pF pF pF Document #: 38-05211 Rev. *C Page 8 of 13 CY7C1352F AC Test Loads and Waveforms 3.3V I/O Test Load OUTPUT Z0 = 50Ω 3.3V OUTPUT RL = 50Ω R = 317Ω VDD 5 pF GND R = 351Ω 10% 1ns ALL INPUT PULSES 90% 90% 10% ≤ 1ns VL = 1.5V ≤ 1ns (a) 2.5V I/O Test Load OUTPUT Z0 = 50Ω 2.5V INCLUDING JIG AND SCOPE (b) (c) R = 1667Ω VDD GND R =1538Ω 10% ALL INPUT PULSES 90% 90% 10% ≤ 1ns OUTPUT RL = 50Ω VL = 1.25V 5 pF INCLUDING JIG AND SCOPE ≤ 1ns (a) Notes: 9. Overshoot: VIH(AC) < VDD +1.5V (Pulse width less than tCYC/2), undershoot: VIL(AC)> -2V (Pulse width less than tCYC/2). 10. TPower-up: Assumes a linear ramp from 0V to VDD (min.) within 200ms. During this time VIH < VDD and VDDQ < VDD. 11. Tested initially and after any design or process changes that may affect these parameters. (b) (c) Switching Characteristics Over the Operating Range[12, 13, 14, 15, 16, 17] 250 MHz Parameter tPOWER Clock tCYC tCH tCL tCO tDOH tCLZ tCHZ tOEV tOELZ tOEHZ tAS Clock Cycle Time Clock HIGH Clock LOW Data Output Valid After CLK Rise Data Output Hold After CLK Rise Clock to Low-Z[13, 14, 15] Clock to High-Z [13, 14, 15] 225 MHz 1 4.4 2.0 2.0 200 MHz 1 5.0 2.0 2.0 166 MHz 1 6.0 2.5 2.5 133 MHz 1 7.5 3.0 3.0 100 MHz 1 10 3.5 3.5 ms ns ns ns 4.5 2.0 0 ns ns ns 4.5 4.5 0 4.5 1.5 ns ns ns ns ns Description VDD (typical) to the first Access[12] Min. Max Min. Max Min. Max Min. Max Min. Max Min. Max Unit 1 4.0 1.7 1.7 2.6 1.0 0 2.6 2.6 [13, 14, 15] Output Times 2.6 1.0 0 2.6 2.6 0 2.6 0.8 1.2 2.6 1.2 0 2.8 1.5 1.0 0 2.8 2.8 0 3.5 1.5 2.8 2.0 0 3.5 3.5 0 4.0 3.5 2.0 0 4.0 4.0 4.0 OE LOW to Output Valid OE LOW to Output Low-Z 0 OE HIGH to Output High-Z[13, 14, 15] Address Set-up Before CLK Rise Set-up Times Shaded areas contain advance information. Notes: 12. This part has a voltage regulator internally; tpower is the time that the power needs to be supplied above VDD minimum initially before a read or write operation can be initiated. 13. tCHZ, tCLZ,tOELZ, and tOEHZ are specified with AC test conditions shown in part (b) of AC Test Loads. Transition is measured ± 200 mV from steady-state voltage. 14. At any given voltage and temperature, tOEHZ is less than tOELZ and tCHZ is less than tCLZ to eliminate bus contention between SRAMs when sharing the same data bus. These specifications do not imply a bus contention condition, but reflect parameters guaranteed over worst case user conditions. Device is designed to achieve Three-state prior to Low-Z under the same system conditions. 15. This parameter is sampled and not 100% tested. 16. Timing reference level is 1.5V when VDDQ = 3.3V and is 1.25V when VDDQ = 2.5V. 17. Test conditions shown in (a) of AC Test Loads unless otherwise noted. Document #: 38-05211 Rev. *C Page 9 of 13 CY7C1352F Switching Characteristics Over the Operating Range[12, 13, 14, 15, 16, 17] (continued) 250 MHz Parameter tALS tWES tCENS tDS tCES Hold Times tAH tALH tWEH tCENH tDH tCEH Address Hold After CLK Rise ADV/LD Hold after CLK Rise GW, BW[A:B] Hold After CLK Rise CEN Hold After CLK Rise Data Input Hold After CLK Rise Chip Enable Hold After CLK Rise 0.4 0.4 0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 ns ns ns ns ns ns Description ADV/LD Set-up Before CLK Rise GW, BW[A:B] Set-Up Before CLK Rise 0.8 0.8 225 MHz 1.2 1.2 1.2 1.2 1.2 200 MHz 1.2 1.2 1.2 1.2 1.2 166 MHz 1.5 1.5 1.5 1.5 1.5 133 MHz 1.5 1.5 1.5 1.5 1.5 100 MHz 1.5 1.5 1.5 1.5 1.5 ns ns ns ns ns Min. Max Min. Max Min. Max Min. Max Min. Max Min. Max Unit 0.8 CEN Set-up Before CLK Rise Data Input Set-up Before CLK Rise 0.8 Chip Enable Set-Up Before CLK Rise 0.8 Switching Waveforms Read/Write Timing[18, 19, 20] 1 CLK tCENS tCENH 2 t CYC 3 4 5 6 7 8 9 10 tCH tCL CEN tCES tCEH CE ADV/LD WE BW[A:B] ADDRESS tAS A1 tAH A2 tDS tDH A3 A4 tCO tCLZ tDOH A5 tOEV A6 tCHZ A7 Data In-Out (DQ) OE WRITE D(A1) WRITE D(A2) D(A1) D(A2) D(A2+1) Q(A3) Q(A4) tOEHZ Q(A4+1) D(A5) Q(A6) tDOH tOELZ BURST WRITE D(A2+1) READ Q(A3) READ Q(A4) BURST READ Q(A4+1) WRITE D(A5) READ Q(A6) WRITE D(A7) DESELECT DON’T CARE UNDEFINED Note: 18. For this waveform ZZ is tied low. 19. When CE is LOW: CE1 is LOW, CE2 is HIGH and CE3 is LOW. When CE is HIGH: CE1 is HIGH or CE2 is LOW or CE3 is HIGH. 20. Order of the Burst sequence is determined by the status of the MODE (0= Linear, 1= Interleaved). Burst operations are optional. Document #: 38-05211 Rev. *C Page 10 of 13 CY7C1352F Switching Waveforms (continued) NOP, STALL, and DESELECT Cycles[18, 19, 21] 1 CLK CEN CE ADV/LD WE BW[A:B] ADDRESS Data In-Out (DQ) WRITE D(A1) 2 3 4 5 6 7 8 9 10 A1 A2 A3 D(A1) A4 Q(A2) WRITE D(A4) A5 tCHZ Q(A3) STALL NOP D(A4) READ Q(A5) DESELECT Q(A5) CONTINUE DESELECT READ Q(A2) STALL READ Q(A3) DON’T CARE ZZ Mode Timing[22, 23] CLK t ZZ UNDEFINED t ZZREC ZZ t ZZI I SUPPLY I DDZZ t RZZI DESELECT or READ Only ALL INPUTS (except ZZ) Notes: 21. The IGNORE CLOCK EDGE or STALL cycle (Clock 3) illustrated CEN being used to create a pause. A write is not performed during this cycle. 22. Device must be deselected when entering ZZ mode. See cycle description table for all possible signal conditions to deselect the device. 23. DQs are in high-Z when exiting ZZ sleep mode. Document #: 38-05211 Rev. *C Page 11 of 13 CY7C1352F Ordering Information Speed (MHz) 250 225 200 166 133 100 Ordering Code CY7C1352F-250AC CY7C1352F-250AI CY7C1352F-225AC CY7C1352F-225AI CY7C1352F-200AC CY7C1352F-200AI CY7C1352F-166AC CY7C1352F-166AI CY7C1352F-133AC CY7C1352F-133AI CY7C1352F-100AC CY7C1352F-100AI Package Name A101 A101 A101 A101 A101 A101 A101 A101 A101 A101 A101 A101 Package Type 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) 100-Lead Thin Quad Flat Pack(14 x 20 x 1.4mm) Operating Range Commercial Industrial Commercial Industrial Commercial Industrial Commercial Industrial Commercial Industrial Commercial Industrial Shaded areas contain advance information. Please contact your local cypress sales representative to order parts that are not listed in the ordering information table. Package Diagram 100-Pin Thin Plastic Quad Flatpack (14 x 20 x 1.4 mm) A101 51-85050-*A 51-85050-*A ZBT is a trademark of Integrated Device Technology. NoBL and No Bus Latency are trademarks of Cypress Semiconductor. All product and company names mentioned in this document are trademarks of their respective holders. Document #: 38-05211 Rev. *C Page 12 of 13 © Cypress Semiconductor Corporation, 2004. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. CY7C1352F Document History Page Document Title: CY7C1352F 4-Mbit (256Kx18) Pipelined SRAM with NoBL™ Architecture Document #: 38-05211 Rev. *C REV. ** *A *B *C ECN NO. Issue Date 119826 123116 200662 225487 12/16/02 01/18/03 See ECN See ECN Orig. of Change HGK RBI SWI VBL New Data Sheet Added power-up requirements to AC test loads and waveforms information Final Data Sheet Update Ordering Info section: unshade active part numbers. Description of Change Document #: 38-05211 Rev. *C Page 13 of 13