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Ordering number : EN*5610A
CMOS LSI
LC374500ST
Internal Synchronization Silicon Gate 4M (524288-word x 8-bit) mask ROM Pin Compatible with Flash Memory
Preliminary Overview
The LC374500ST is a 524288-word x 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.
Package Dimensions
unit: mm 3224-TSOP32
[LC374500ST]
Features
* 524288-word x 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 A (maximum) * Fully static operation (internal synchronization) * Three-state outputs * Pin compatible with flash memory * Package--32-pin TSOP ( 8 x 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 Do to D7 CE OE VCC VSS Address input Data output Chip enable input Output enable input Power supply Ground
Block Diagram
Row decoder
Memory cell array
Address buffer
Column decoder
CE buffer
Internal timing generator
Sense amplifiers
OE buffer
Output buffer
Function Logic Table
CE H L L OE X H L Output pin state High-impedance High-impedance DOUT Supply current Standby mode current Operating mode current Operating mode current
Note: "X" indicates either a high or a low level.
No. 5610-2/4
LC374500ST
Specifications
Absolute Maximum Ratings
Parameter Supply voltage Input pin voltage Output pin voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC VIN VOUT Pd max Topr Tstg Ta = 25C, reference value for the Sanyo DIP. Condition Rating -0.3 to +7.0 -0.3 to VCC + 0.3 -0.3 to VCC + 0.3 1.0 -10 to +70 -55 to +125 Unit V V V W C C Note 1 1, 2 1 1 1 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 = 25C, f = 1.0 MHz
Parameter Input pin capacitance Output pin capacitance Note: Symbol CIN COUT Conditions VIN = 0 V, reference value for the Sanyo DIP. VOUT = 0 V, reference value for the Sanyo DIP. Ratings min typ max 8 10 Unit pF pF Note 3 3
3. These parameters are sampled, and are not measured for every unit.
DC Allowable Operating Ranges at Ta = -10 to +70C, VCC = 2.6 to 5.5 V
Parameter Supply voltage Input high-level voltage Input low-level voltage Symbol VCC VIH VIL Conditions Ratings min 2.6 2.2 -0.3 typ 5.0 max 5.5 VCC + 0.3 +0.6 Unit V V V
DC Electrical Characteristics at Ta = -10 to +70C, VCC = 2.6 to 5.5 V
Parameter Symbol ICCA1 ICCA2 ICCS1 ICCS2 ILI ILO VOH VOL Conditions CE = 0.2 V, VI = VCC - 0.2 V/0.2 V CE = VIL, IO = 0 mA, VL = VIH/VIL, f = 10 MHz CE = VCC - 0.2 V CE = VIH VIN = 0 to VCC CE or OE = VIH, VOUT = 0 to VCC IOH = -0.5 mA IOL = 0.5 mA 0.8 VCC 0.2 Ratings min typ max 30 55 30 (1.0) 1.0 (300) 1.0 1.0 Unit A mA A mA (A) A A V V
Operating current
Standby current Input leakage current Output leakage current Output high-level voltage Output low-level voltage
Note: Values in parentheses are guaranteed at Ta = 25C.
AC Characteristics at Ta = -10 to +70C, VCC = 2.6 to 5.5 V
Parameter Cycle time Address access time CE access time OE access time Output hold time Output disable time* Symbol tCYC tAA tCA tOA tOH tOD 20 100 Conditions Ratings min 200 200 (120) 200 (100) 80 (40) typ max Unit ns ns ns ns 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 Rise/fall time Input discrimination level Output discrimination level Output capacitance 0.4 V to 2.8 V 5 ns 1.5 V 1.5 V 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.
s 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. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: 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: 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. s 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

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