Ordering number : EN*5610A CMOS LSI LC374500ST Internal Synchronization Silicon Gate 4M (524288-word × 8-bit) mask ROM Pin Compatible with Flash Memory Preliminary Overview Package Dimensions The LC374500ST is a 524288-word × 8-bit (4M) mask programmable ROM that is pin compatible with flash memory. Since this product supports the wide operating voltage range of 2.6 to 5.5 V and achieves access times of 100 ns (tCA) when VCC is between 4.5 and 5.5 V and 200 ns when VCC is between 2.6 and 5.5 V, it can be used both in high-speed 5-V systems and battery-operated 3-V systems. Since this product is pin compatible with flash memory it can replace flash memory used during prototyping and production. unit: mm 3224-TSOP32 [LC374500ST] Features • 524288-word × 8-bit organization • Wide supply voltage range: 2.6 to 5.5 V • Access times (tAA): 120 ns (maximum) at VCC = 4.5 to 5.5 V (tCA): 100 ns (maximum) at VCC = 4.5 to 5.5 V 200 ns (maximum) at VCC = 2.6 to 5.5 V • Operating supply current: 50 mA (maximum) • Standby mode supply current: 30 µA (maximum) • Fully static operation (internal synchronization) • Three-state outputs • Pin compatible with flash memory • Package—32-pin TSOP ( 8 × 20 mm) plastic package: LC374500ST SANYO: TSOP32 SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 22898HA (OT) No. 5610-1/4 LC374500ST Pin Assignment Top view Pin Functions A0 to A18 Address input Do to D7 Data output CE Chip enable input OE Output enable input VCC Power supply VSS Ground Address buffer Row decoder Block Diagram Memory cell array Column decoder CE buffer OE buffer Internal timing generator Sense amplifiers Output buffer Function Logic Table CE OE Output pin state Supply current H X High-impedance Standby mode current L H High-impedance Operating mode current L L DOUT Operating mode current Note: “X” indicates either a high or a low level. No. 5610-2/4 LC374500ST Specifications Absolute Maximum Ratings Parameter Symbol Condition Rating Unit Note Supply voltage VCC –0.3 to +7.0 V 1 Input pin voltage VIN –0.3 to VCC + 0.3 V 1, 2 Output pin voltage VOUT Allowable power dissipation Pd max –0.3 to VCC + 0.3 V 1 1.0 W 1 Ta = 25°C, reference value for the Sanyo DIP. Operating temperature Topr –10 to +70 °C 1 Storage temperature Tstg –55 to +125 °C 1 Note: 1. This device may be permanently damaged by stresses in excess of those listed in the maximum ratings. These are stress ratings only, and functional operation of the device at these conditions or any other conditions beyond those listed in the “DC Allowable Operating Ranges” item is not implied. 2. The minimum value is –3.0 V for pulse widths of under 30 ns. Capacitance Characteristics at Ta = 25°C, f = 1.0 MHz Parameter Input pin capacitance Output pin capacitance Note: Symbol CIN COUT Ratings Conditions min typ Unit Note 8 pF 3 10 pF 3 max VIN = 0 V, reference value for the Sanyo DIP. VOUT = 0 V, reference value for the Sanyo DIP. 3. These parameters are sampled, and are not measured for every unit. DC Allowable Operating Ranges at Ta = –10 to +70°C, VCC = 2.6 to 5.5 V Parameter Symbol Conditions Ratings min typ Unit max Supply voltage VCC 2.6 5.5 V Input high-level voltage VIH 2.2 VCC + 0.3 V Input low-level voltage VIL –0.3 +0.6 V 5.0 DC Electrical Characteristics at Ta = –10 to +70°C, VCC = 2.6 to 5.5 V Parameter Operating current Standby current Symbol Conditions Ratings min typ Unit max ICCA1 CE = 0.2 V, VI = VCC – 0.2 V/0.2 V 30 µA ICCA2 CE = VIL, IO = 0 mA, VL = VIH/VIL, f = 10 MHz 55 mA ICCS1 CE = VCC – 0.2 V ICCS2 CE = VIH 30 (1.0) µA 1.0 (300) mA (µA) Input leakage current ILI VIN = 0 to VCC ±1.0 µA Output leakage current ILO CE or OE = VIH, VOUT = 0 to VCC ±1.0 µA Output high-level voltage VOH IOH = –0.5 mA Output low-level voltage VOL IOL = 0.5 mA 0.8 VCC V 0.2 V Note: Values in parentheses are guaranteed at Ta = 25°C. AC Characteristics at Ta = –10 to +70°C, VCC = 2.6 to 5.5 V Parameter Cycle time Symbol tCYC Conditions Ratings min typ Unit max 200 ns Address access time tAA 200 (120) CE access time tCA 200 (100) ns OE access time tOA 80 (40) ns Output hold time tOH Output disable time* tOD 100 ns 20 ns ns Note: Values in parentheses are for VCC = 4.5 to 5.5 V *: tOD is defined as the time between the rise of either CE or OE, whichever comes first, and the point when the output goes to the high-impedance state. These parameters are sampled, and are not measured for every unit. No. 5610-3/4 LC374500ST Test Conditions Input voltage amplitude 0.4 V to 2.8 V Rise/fall time 5 ns Input discrimination level 1.5 V Output discrimination level 1.5 V Output capacitance See figure 1 *: Includes the oscilloscope and jig capacitances. Figure 1 Output Load Circuit Timing Waveforms Address input Valid Address High impedance Data output Valid data Notes on System Design This LSI adopts the ATD technique, in which operation starts when a change in either the CE or address inputs is detected. This means that the output data immediately after power is applied is invalid. When using this LSI as program memory for Z80 and similar microprocessors, applications must take into account the fact that valid data will not be output after power is first applied unless the value of either the CE or at least one of the address lines is changed after the power supply has stabilized. Another point due to the use of the ATD technique is that this LSI is sensitive to input noise. Do not apply voltages outside the allowable DC input levels for extended periods and do not apply input voltages with large noise components. ■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: ➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. ■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of April, 1998. Specifications and information herein are subject to change without notice. PS No. 5610-4/4