CY7C1049B 512K x 8 Static RAM Functional Description[1] Features • High speed — tAA = 12 ns • Low active power — 1320 mW (max.) • Low CMOS standby power (Commercial L version) — 2.75 mW (max.) • 2.0V Data Retention (400 µW at 2.0V retention) • Automatic power-down when deselected • TTL-compatible inputs and outputs • Easy memory expansion with CE and OE features • Available in Pb-free and non Pb-free 36-Lead (400-Mil) Molded SOJ The CY7C1049B is a high-performance CMOS static RAM organized as 524,288 words by 8 bits. Easy memory expansion is provided by an active LOW Chip Enable (CE), an active LOW Output Enable (OE), and tri-state drivers. Writing to the device is accomplished by taking Chip Enable (CE) and Write Enable (WE) inputs LOW. Data on the eight I/O pins (I/O0 through I/O7) is then written into the location specified on the address pins (A0 through A18). Reading from the device is accomplished by taking Chip Enable (CE) and Output Enable (OE) LOW while forcing Write Enable (WE) HIGH. Under these conditions, the contents of the memory location specified by the address pins will appear on the I/O pins. The eight input/output pins (I/O0 through I/O7) are placed in a high-impedance state when the device is deselected (CE HIGH), the outputs are disabled (OE HIGH), or during a write operation (CE LOW, and WE LOW). The CY7C1049B is available in a standard 400-mil-wide 36-pin SOJ package with center power and ground (revolutionary) pinout. Logic Block Diagram Pin Configuration SOJ Top View A0 A1 A2 A3 A4 CE I/O0 I/O1 VCC GND I/O2 I/O3 WE A5 A6 A7 A8 A9 I/O0 INPUT BUFFER CE I/O1 I/O2 SENSE AMPS ROW DECODER A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 512K x 8 ARRAY I/O3 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 NC A18 A17 A16 A15 OE I/O7 I/O6 GND VCC I/O5 I/O4 A14 A13 A12 A11 A10 NC I/O4 I/O5 COLUMN DECODER POWER DOWN I/O6 I/O7 A 11 A 12 A 13 A14 A15 A16 A17 A18 WE OE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Note: 1. For guidelines on SRAM system design, please refer to the ‘System Design Guidelines’ Cypress application note, available on the internet at www.cypress.com. Cypress Semiconductor Corporation Document #: 38-05169 Rev. *B • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised August 31, 2006 [+] Feedback CY7C1049B Selection Guide Maximum Access Time (ns) Maximum Operating Current (mA) Maximum CMOS Standby Current (mA) Commercial Industrial Commercial L Maximum Ratings -12 -15 -17 12 15 17 240 220 195 8 8 8 - - - - - 0.5 Current into Outputs (LOW)......................................... 20 mA (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 Static Discharge Voltage............................................ >2001V (per MIL-STD-883, Method 3015) Latch-Up Current ..................................................... >200 mA Operating Range Supply Voltage on VCC to Relative GND[2] .... –0.5V to +7.0V Range Ambient Temperature DC Voltage Applied to Outputs in High Z State[2] ....................................–0.5V to VCC + 0.5V VCC Commercial 0°C to +70°C 4.5V–5.5V DC Input Voltage[2] .................................–0.5V to VCC + 0.5V Industrial –40°C to +85°C Electrical Characteristics Over the Operating Range Parameter Description Test Conditions -12 Min. -15 Max. 2.4 Min. -17 Max. VOH Output HIGH Voltage VCC = Min., IOH = –4.0 mA VOL Output LOW Voltage VCC = Min., IOL = 8.0 mA 2.4 VIH Input HIGH Voltage 2.2 VCC + 0.3 2.2 VCC + 0.3 VIL Input LOW Voltage[2] –0.3 0.8 –0.3 0.4 Min. Max. 2.4 0.4 Unit V 0.4 V 2.2 VCC + 0.3 V 0.8 –0.3 0.3 V IIX Input Leakage Current GND < VI < VCC –1 +1 –1 +1 –1 +1 µA IOZ Output Leakage Current GND < VOUT < VCC, Output Disabled –1 +1 –1 +1 –1 +1 µA ICC VCC Operating Supply Current VCC = Max., f = fMAX = 1/tRC 240 220 195 mA ISB1 Automatic CE Power-Down Current —TTL Inputs Max. VCC, CE > VIH VIN > VIH or VIN < VIL, f = fMAX 40 40 40 mA ISB2 Automatic CE Power-Down Current —CMOS Inputs Max. VCC, CE > VCC – 0.3V, VIN > VCC – 0.3V, or VIN < 0.3V, f = 0 8 8 8 mA - - 0.5 mA - - 8 mA Com’l Com’l Ind’l L Note: 2. Minimum voltage is–2.0V for pulse durations of less than 20 ns. Document #: 38-05169 Rev. *B Page 2 of 9 [+] Feedback CY7C1049B Capacitance[3] Parameter Description CIN Input Capacitance COUT I/O Capacitance Test Conditions Max. Unit 8 pF 8 pF TA = 25°C, f = 1 MHz, VCC = 5.0V AC Test Loads and Waveforms R1 481Ω 5V R1 481 Ω 5V OUTPUT ALL INPUT PULSES 3.0V 90% OUTPUT 30 pF R2 255Ω INCLUDING JIG AND SCOPE (a) 5 pF R2 255Ω INCLUDING JIG AND SCOPE (b) GND ≤ 3 ns 10% 90% 10% ≤ 3 ns THÉVENIN EQUIVALENT 167Ω 1.73V OUTPUT Equivalent to: Note: 3. Tested initially and after any design or process changes that may affect these parameters. Document #: 38-05169 Rev. *B Page 3 of 9 [+] Feedback CY7C1049B Switching Characteristics Over the Operating Range[4] -12 Parameter Description Min. -15 Max. Min. -17 Max. Min. Max. Unit Read Cycle tpower VCC(typical) to the First Access[5] 1 1 1 ms tRC Read Cycle Time 12 15 17 ns tAA Address to Data Valid tOHA Data Hold from Address Change tACE CE LOW to Data Valid 12 15 17 ns tDOE OE LOW to Data Valid 6 7 8 ns tLZOE 12 3 [7] OE LOW to Low Z 3 0 OE HIGH to High Z tLZCE CE LOW to Low Z[7] tHZCE CE HIGH to High Z[6, 7] tPU CE LOW to Power-Up tPD CE HIGH to Power-Down ns ns 7 3 7 ns 7 0 12 ns 3 6 0 ns 0 6 3 17 3 0 [6, 7] tHZOE 15 7 ns 0 ns 15 17 ns Write Cycle[8, 9] tWC Write Cycle Time 12 15 17 ns tSCE CE LOW to Write End 10 12 12 ns tAW Address Set-Up to Write End 10 12 12 ns tHA Address Hold from Write End 0 0 0 ns tSA Address Set-Up to Write Start 0 0 0 ns tPWE WE Pulse Width 10 12 12 ns tSD Data Set-Up to Write End 7 8 8 ns tHD Data Hold from Write End 0 0 0 ns tLZWE WE HIGH to Low Z[7] 3 3 3 ns tHZWE WE LOW to High Z[6, 7] 6 7 8 ns Max. Unit 200 µA Data Retention Characteristics Over the Operating Range Parameter Conditions[11] Description VDR VCC for Data Retention ICCDR Data Retention Current tCDR[3] Chip Deselect to Data Retention Time tR[10] Operation Recovery Time Min. 2.0 Com’l L VCC = VDR = 2.0V, CE > VCC – 0.3V VIN > VCC – 0.3V or VIN < 0.3V V 0 ns tRC ns Notes: 4. Test conditions assume signal transition time of 3 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified IOL/IOH and 30-pF load capacitance. 5. This part has a voltage regulator which steps down the voltage from 5V to 3.3V internally. tpower time has to be provided initially before a read/write operation is started. 6. tHZOE, tHZCE, and tHZWE are specified with a load capacitance of 5 pF as in part (b) of AC Test Loads. Transition is measured ±500 mV from steady-state voltage. 7. At any given temperature and voltage condition, tHZCE is less than tLZCE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any given device. 8. The internal write time of the memory is defined by the overlap of CE LOW, and WE LOW. CE and WE must be LOW to initiate a write, and the transition of either of these signals can terminate the write. The input data set-up and hold timing should be referenced to the leading edge of the signal that terminates the write. 9. The minimum write cycle time for Write Cycle no. 3 (WE controlled, OE LOW) is the sum of tHZWE and tSD. 10. tr < 3 ns for all the speeds 11. No input may exceed VCC + 0.5V. Document #: 38-05169 Rev. *B Page 4 of 9 [+] Feedback CY7C1049B Data Retention Waveform DATA RETENTION MODE 3.0V VCC 3.0V VDR > 2V tCDR tR CE Switching Waveforms Read Cycle No. 1[12, 13] tRC ADDRESS tAA tOHA DATA OUT PREVIOUS DATA VALID DATA VALID Read Cycle No. 2 (OE Controlled)[13, 14] ADDRESS tRC CE tACE OE tHZOE tDOE DATA OUT tLZOE HIGH IMPEDANCE tLZCE VCC SUPPLY CURRENT tHZCE HIGH IMPEDANCE DATA VALID tPD tPU 50% ICC 50% ISB Notes: 12. Device is continuously selected. OE, CE = VIL. 13. WE is HIGH for read cycle. 14. Address valid prior to or coincident with CE transition LOW. Document #: 38-05169 Rev. *B Page 5 of 9 [+] Feedback CY7C1049B Switching Waveforms (continued) Write Cycle No. 1 (CE Controlled)[15, 16] tWC ADDRESS tSCE CE tSA tSCE tAW tHA tPWE WE tSD DATA I/O tHD DATA VALID Write Cycle No. 2 (WE Controlled, OE HIGH During Write)[15, 16] tWC ADDRESS tSCE CE tAW tSA tHA tPWE WE OE tSD DATA I/O tHD DATAIN VALID NOTE 17 tHZOE Notes: 15. Data I/O is high impedance if OE = VIH. 16. If CE goes HIGH simultaneously with WE going HIGH, the output remains in a high-impedance state. 17. During this period the I/Os are in the output state and input signals should not be applied. Document #: 38-05169 Rev. *B Page 6 of 9 [+] Feedback CY7C1049B Switching Waveforms (continued) Write Cycle No. 3 (WE Controlled, OE LOW)[16] tWC ADDRESS tSCE CE tAW tSA tHA tPWE WE tSD DATA I/O NOTE 17 tHD DATA VALID tLZWE tHZWE Ordering Information Speed (ns) 12 15 17 Ordering Code CY7C1049B-12VC Package Name Package Type 51-85090 36-Lead (400-Mil) Molded SOJ CY7C1049B-12VXC 36-Lead (400-Mil) Molded SOJ (Pb-free) CY7C1049B-15VC 36-Lead (400-Mil) Molded SOJ CY7C1049B-15VXC 36-Lead (400-Mil) Molded SOJ (Pb-free) CY7C1049B-15VI 36-Lead (400-Mil) Molded SOJ CY7C1049B-15VXI 36-Lead (400-Mil) Molded SOJ (Pb-free) CY7C1049BL-17VC 36-Lead (400-Mil) Molded SOJ Document #: 38-05169 Rev. *B Operating Range Commercial Industrial Commercial Page 7 of 9 [+] Feedback CY7C1049B Package Diagram 36-lead (400-Mil) Molded SOJ (51-85090) 51-85090-*B All product and company names mentioned in this document may be the trademarks of their respective holders. Document #: 38-05169 Rev. *B Page 8 of 9 © Cypress Semiconductor Corporation, 2006. 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. [+] Feedback CY7C1049B Document History Page Document Title: CY7C1049B 512K x 8 Static RAM Document Number: 38-05169 REV. ECN NO. Issue Date Orig. of Change Description of Change ** 110209 12/02/01 SZV Change from Spec number: 38-00937 to 38-05169 *A 116465 09/16/02 CEA Add applications foot note to data sheet, page 1 *B 498501 See ECN NXR Removed 20 ns and 25 ns speed bin Changed the description of IIX from Input Load Current to Input Leakage Current in DC Electrical Characteristics table Updated the Ordering Information Table Document #: 38-05169 Rev. *B Page 9 of 9 [+] Feedback