SANYO LC378000RP Datasheet

Overview

The LC378000RP is an 8-Mbit mask ROM that can be
switched between byte mode, which provides an 8-bit ×
1,048,576-word structure, and word mode, which provides
a 16-bit × 524,288-word structure. Since this device
operates over the wide supply voltage range of 2.6 to

5.5 V and achieves access times (tAA) of 100 ns (at VCC=

4.5 to 5.5 V) and 200 ns (at VCC= 2.6 to 5.5 V), it can be
used in a wide range of systems, from 5-V systems
requiring high-speed access to 3-V battery operated
systems.

Features

• Supply voltage range: 2.6 to 5.5 V

• Access time (tAA):100 ns (VCC= 4.5 to 5.5 V)
(tCA): 110 ns (VCC= 4.5 to 5.5 V)

200 ns (VCC= 2.6 to 5.5 V)

• Switchable between 8-bit and 16-bit data path widths

Byte mode: 1,048,576 words × 8 bits
Word mode: 524,288 words × 16 bits

• Operating current drain: 90 mA (maximum)

• Standby current: 30 µA (maximum)

• Fully static operation (internal synchronization)

• Three-state outputs

• Package: 42-pin DIP (600 mil) plastic package

Package Dimensions

unit: mm

3014A-DIP42

CMOS IC

42098RM (OT) No. 5793-1/4

Preliminary

SANYO: DIP42

[LC378000RP]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Internally Synchronized Silicon Gate 8M (1,048,576-

word × 8-bit, 524,288-word × 16-bit) Mask ROM

LC378000RP

Ordering number : EN*5793

Pin Assignment

No. 5793-2/4

LC378000RP

Block Diagram

Pin Functions

D15/A-1:In byte mode, this pin functions as

the A-1 address input, and in word
mode, it functions as the D15 data
output pin.

A0 to A19 Address inputs
D0 to D15/A-1 Data outputs
CE Chip enable input
OE Output enable input
BYTE Byte/word mode switching
V

CC

Power

V

SS

Ground

Function Logic Table

Note: X: A high-level or low-level input

D8 to 14 are high impedance and D15 functions as the A-1 address input.

CE OE BYTE Output pin state Current drain

H X L High impedance Standby mode level
L H L High impedance Operating mode level
L L L DOUT × 8 (BYTE MODE)* Operating mode level
H X H High impedance Standby mode level
L H H High impedance Operating mode level
L L H DOUT × 16 (WORD MODE) Operating mode level

Address buffer

Row decoder

Memory array

Column decoder

+ bias circuit

Sense amplifier

Byte/word output

switching circuit

Output buffer

A-1 buffer

CE buffer

BYTE buffer

OE buffer

Internal timing

generator