DATA SHEET MOS INTEGRATED CIRCUIT µPD444001 4M-BIT CMOS FAST SRAM 4M-WORD BY 1-BIT Description The µPD444001 is a high speed, low power, 4,194,304 bits (4,194,304 words by 1 bit) CMOS static RAM. Operating supply voltage is 5.0 V ± 0.5 V. The µPD444001 is packaged in 32-pin PLASTIC SOJ. Features • 4,194,304 words by 1 bit organization • Fast access time : 10, 11, 12 ns (MAX.) • Output Enable input for easy application • Single +5.0 V power supply Ordering Information Part number Package Access time Supply current mA (MAX.) ns (MAX.) At operating At standby 10 µPD444001LE-10 32-pin PLASTIC SOJ 10 170 µPD444001LE-11 (10.16 mm (400)) 11 160 12 150 µPD444001LE-12 The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version. Not all devices/types available in every country. Please check with local NEC representative for availability and additional information. Document No. M14947EJ4V0DS00 (4th edition) Date Published May 2002 NS CP(K) Printed in Japan The mark shows major revised points. © 2000 µPD444001 Pin Configuration (Marking Side) /xxx indicates active low signal. 32-pin PLASTIC SOJ (10.16 mm (400)) A0 1 32 A21 A1 2 31 A20 A2 3 30 A19 A3 4 29 A18 A4 5 28 A17 A5 6 27 A16 /CS 7 26 /OE VCC 8 25 GND GND 9 24 VCC DIN 10 23 DOUT /WE 11 22 A15 A6 12 21 A14 A7 13 20 A13 A8 14 19 A12 A9 15 18 A11 A10 16 17 NC A0 - A21 : Address Inputs DIN : Data Input DOUT : Data Output /CS : Chip Select /WE : Write Enable /OE : Output Enable VCC : Power supply GND : Ground NC : No connection Remark Refer to Package Drawing for the 1-pin index mark. 2 Data Sheet M14947EJ4V0DS µPD444001 A0 | A21 DIN Row decoder Address buffer Block Diagram Memory cell array 4,194,304 bits Input data controller Sense amplifier / Switching circuit Output data controller Column decoder DOUT Address buffer /CS /OE /WE VCC GND Truth Table /CS /OE /WE Mode I/O Supply current H × × Not selected High impedance ISB L L H Read DOUT ICC L × L Write DIN L H H Output disable High impedance Remark × : Don’t care Data Sheet M14947EJ4V0DS 3 µPD444001 Electrical Specifications Absolute Maximum Ratings Parameter Symbol Supply voltage Condition VCC Rating Unit –0.5 Note to +7.0 V –0.5 Note Input / Output voltage VT to VCC+0.5 V Operating ambient temperature TA 0 to 70 °C Storage temperature Tstg –55 to +125 °C Note –2.0 V (MIN.) (pulse width : 2 ns) Caution Exposing the device to stress above those listed in Absolute Maximum Rating could cause permanent damage. The device is not meant to be operated under conditions outside the limits described in the operational section of this specification. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Condition MIN. TYP. MAX. Unit 5.0 5.5 V VCC + 0.5 V +0.8 V 70 °C Supply voltage VCC 4.5 High level input voltage VIH 2.2 Low level input voltage VIL –0.5 Operating ambient temperature TA 0 Note –2.0 V (MIN.) (pulse width : 2 ns) 4 Data Sheet M14947EJ4V0DS Note µPD444001 DC Characteristics (Recommended Operating Conditions Unless Otherwise Noted) Parameter Symbol Test condition MIN. TYP. MAX. Unit Input leakage current ILI VIN = 0 V to VCC –2 +2 µA Output leakage current ILO VOUT = 0 V to VCC, –2 +2 µA mA /CS = VIH or /OE = VIH or /WE = VIL Operating supply current Standby supply current ICC /CS = VIL, Cycle time : 10 ns 170 IOUT = 0 mA, Cycle time : 11 ns 160 Minimum cycle time Cycle time : 12 ns 150 ISB /CS = VIH, VIN = VIH or VIL 40 ISB1 /CS ≥ VCC – 0.2 V, 10 mA VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V High level output voltage VOH IOH = –4.0 mA Low level output voltage VOL IOL = +8.0 mA Remark 2.4 V 0.4 V MAX. Unit VIN = 0 V 6 pF VOUT = 0 V 8 pF VIN : Input voltage VOUT : Output voltage Capacitance (TA = 25 °C, f = 1 MHz) Parameter Input capacitance Output capacitance Symbol CIN COUT Test condition MIN. TYP. Remarks 1. VIN : Input voltage VOUT : Output voltage 2. These parameters are periodically sampled and not 100% tested. Data Sheet M14947EJ4V0DS 5 µPD444001 AC Characteristics (Recommended Operating Conditions Unless Otherwise Noted) AC Test Conditions Input Waveform (Rise and Fall Time ≤ 3 ns) Output Waveform Output Load AC characteristics directed with the note should be measured with the output load shown in Figure 1 or Figure 2. Figure 1 Figure 2 (for tAA, tACS, tOE, tOH) (for tCLZ, tOLZ, tCHZ, tOHZ, tWHZ, tOW ) Ω Ω Ω Ω Remark 6 CL includes capacitances of the probe and jig, and stray capacitances. Data Sheet M14947EJ4V0DS µPD444001 Read Cycle Parameter Symbol -10 MIN. -11 MAX. 10 MIN. -12 MAX. 11 MIN. Unit Notes MAX. Read cycle time tRC 12 ns Address access time tAA 10 11 12 ns /CS access time tACS 10 11 12 ns /OE access time tOE 5 5 6 ns Output hold from address change tOH 3 3 3 ns /CS to output in low impedance tCLZ 3 3 3 ns /OE to output in low impedance tOLZ 0 0 0 ns /CS to output in high impedance tCHZ 5 6 6 ns /OE to output hold in high impedance tOHZ 5 5 6 ns 1 2, 3 Notes 1. See the output load shown in Figure 1. 2. Transition is measured at ± 200 mV from steady-state voltage with the output load shown in Figure 2. 3. These parameters are periodically sampled and not 100% tested. Read Cycle Timing Chart 1 (Address Access) Remarks 1. In read cycle, /WE should be fixed to high level. 2. /CS = /OE = VIL Data Sheet M14947EJ4V0DS 7 µPD444001 Read Cycle Timing Chart 2 (/CS Access) Caution Address valid prior to or coincident with /CS low level input. Remark In read cycle, /WE should be fixed to high level. 8 Data Sheet M14947EJ4V0DS µPD444001 Write Cycle Parameter Symbol -10 MIN. -11 MAX. MIN. -12 MAX. MIN. Unit MAX. Write cycle time tWC 10 11 12 ns /CS to end of write tCW 7 7.5 8 ns Address valid to end of write tAW 7 7.5 8 ns Write pulse width tWP 7 8 8 ns Data valid to end of write tDW 5 5 6 ns Data hold time tDH 0 0 0 ns Address setup time tAS 0 0 0 ns Write recovery time tWR 1 1 1 ns /WE to output in high impedance tWHZ Output active from end of write tOW 5 3 5 3 6 3 Notes ns 1, 2 ns Notes 1. Transition is measured at ± 200 mV from steady-state voltage with the output load shown in Figure 2. 2. These parameters are periodically sampled and not 100% tested. Data Sheet M14947EJ4V0DS 9 µPD444001 Write Cycle Timing Chart 1 (/WE Controlled) Cautions 1. /CS or /WE should be fixed to high level during address transition. 2. Do not input data to DOUT while DOUT is in the output state. Remarks 1. Write operation is done during the overlap time of a low level /CS and a low level /WE. 2. When /WE is at low level, the DOUT pin is always high impedance. When /WE is at high level, read operation is executed. Therefore /OE should be at high level to make the DOUT pin high impedance. 10 Data Sheet M14947EJ4V0DS µPD444001 Write Cycle Timing Chart 2 (/CS Controlled) tWC Address (Input) tAS tCW /CS (Input) tAW tWP tWR /WE (Input) tDW tDH Data in DIN (Input) High impedance DOUT (Output) Cautions 1. /CS or /WE should be fixed to high level during address transition. 2. Do not input data to DOUT while DOUT is in the output state. Remark Write operation is done during the overlap time of a low level /CS and a low level /WE. Data Sheet M14947EJ4V0DS 11 µPD444001 Package Drawing 32-PIN PLASTIC SOJ (10.16mm (400)) B 32 17 C 1 D 16 G J E F U M N S M Q T P S K I H NOTE Each lead centerline is located within 0.12 mm of its true position (T.P.) at maximum material condition. ITEM MILLIMETERS B 21.26±0.2 C 10.16 D 11.18±0.2 E 1.005±0.1 F 0.74 G 3.5±0.2 H 2.545±0.2 I 0.8 MIN. J 2.6 K M 1.27(T.P.) 0.40±0.10 N 0.12 P 9.4±0.20 Q T 0.1 R0.85 U 0.20 +0.10 −0.05 P32LE-400A-1 12 Data Sheet M14947EJ4V0DS µPD444001 Recommended Soldering Conditions Please consult with our sales offices for soldering conditions of the µPD444001. Type of Surface Mount Device µPD444001LE : 32-pin PLASTIC SOJ (10.16 mm (400)) Data Sheet M14947EJ4V0DS 13 µPD444001 Revision History Edition/ Date 4th edition/ Page This edition Previous edition p.1, 2, 12, 13 p.1, 2, 13, 14 Type of revision Deletion May 2002 Location Ordering Information, Description (Previous edition → This edition) 32-pin PLASTIC TSOP (II) Pin Configuration, Package Drawing, Type of Surface Mount Device p.5 p.7, 9 p.5 p.7, 9 Deletion DC Characteristics Remark2 Modification Capacitance Remark2 Modification Read Cycle, Write Cycle Note3 Deletion 14 Data Sheet M14947EJ4V0DS Remark µPD444001 NOTES FOR CMOS DEVICES 1 PRECAUTION AGAINST ESD FOR SEMICONDUCTORS Note: Strong electric field, when exposed to a MOS device, can cause destruction of the gate oxide and ultimately degrade the device operation. Steps must be taken to stop generation of static electricity as much as possible, and quickly dissipate it once, when it has occurred. Environmental control must be adequate. When it is dry, humidifier should be used. It is recommended to avoid using insulators that easily build static electricity. Semiconductor devices must be stored and transported in an anti-static container, static shielding bag or conductive material. All test and measurement tools including work bench and floor should be grounded. The operator should be grounded using wrist strap. Semiconductor devices must not be touched with bare hands. Similar precautions need to be taken for PW boards with semiconductor devices on it. 2 HANDLING OF UNUSED INPUT PINS FOR CMOS Note: No connection for CMOS device inputs can be cause of malfunction. If no connection is provided to the input pins, it is possible that an internal input level may be generated due to noise, etc., hence causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input levels of CMOS devices must be fixed high or low by using a pull-up or pull-down circuitry. Each unused pin should be connected to V DD or GND with a resistor, if it is considered to have a possibility of being an output pin. All handling related to the unused pins must be judged device by device and related specifications governing the devices. 3 STATUS BEFORE INITIALIZATION OF MOS DEVICES Note: Power-on does not necessarily define initial status of MOS device. Production process of MOS does not define the initial operation status of the device. Immediately after the power source is turned ON, the devices with reset function have not yet been initialized. Hence, power-on does not guarantee out-pin levels, I/O settings or contents of registers. Device is not initialized until the reset signal is received. Reset operation must be executed immediately after power-on for devices having reset function. Data Sheet M14947EJ4V0DS 15 µPD444001 • The information in this document is current as of May, 2002. The information is subject to change without notice. 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