REV. 1.1, JUN. 23, 2003

P/N: PM0838

MX23L8051

8M-BIT [8M x 1] CMOS SERIAL MASK-ROM

GENERAL

· 8,338,608 x 1 bit structure

· Single Power Supply Operation

- 3.0 to 3.6 volt for read operations

· Latch-up protected to 100mA from -1V to Vcc +1V

PERFORMANCE

High Performance

Fast access time: 20MHz serial clock (50pF + 1TTL

Load)

Low Power Consumption

Low active read current: 10mA (typical) at 20MHz

Low standby current: 30uA (CMOS)

SOFTWARE FEATURES

· Input Data Format

1-byte Command code, 3-byte address, 1-byte byte

address

HARDWARE FEATURES

· SCLK Input

Serial clock input

· SI Input

Serial Data Input

· SO Output

Serial Data Output

· PACKAGE

28-pin SOP (330mil)

FEATURES

GENERAL DESCRIPTION

The MX23L8051 is a CMOS 8,338,608 bit serial Mask

ROM, which is configured as 1,048,576 x 8 internally. The

MX23L8051 features a serial peripheral interface and

software protocol allowing operation on a simple 3- wire

bus. The three bus signals are a clock input (SCLK), a

serial data input (SI), and a serial data output (SO). Serial

peripheral interface access to the device is enabled by CS

input.

The MX23L8051 provide sequential read operation on the

whole chip.

When the device is not in operation and CS is high, it is put

in standby mode and draws less than 30uA DC current.

PIN CONFIGURATIONS

SYMBOL

DESCRIPTION

Chip Select

Serial Data Input

Serial Data Output

SCLK

Clock Input

VCC

+ 3.3V Power Supply

GND

Ground

No Internal Connection

PIN DESCRIPTION

28-PIN SOP (330 mil)

GND

VCC

SCLK

MX23L8051

P/N: PM0838

REV. 1.1, JUN. 23, 2003

MX23L8051

COMMAND DEFINITION

Command

Read Array (byte)

1st

52H

2nd

AD1

3rd

AD2

4th

AD3

5th

6th

7th

8th

9th

Action

n bytes read out until CS goes high

1-byte command code

Bit7(MSB) Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

3-byte address(0 to 0FFFH)

AD1:

A19

A18

A17

AD2:

A16

A15

A14

A13

A12

A11

A10

AD3:

1-byte byte address(0 to 7FH)

BA:

Note:
1.X is dummy cycle and is necessary
2.AD1 to AD3 are address input data
3.BA is byte address

P/N: PM0838

REV. 1.1, JUN. 23, 2003

MX23L8051

DEVICE OPERATION

1.When incorrect command is inputted to this LSI, this LSI becomes standby mode and keeps the standby mode until

next CS falling edge. In standby mode, SO pin of this LSI should be High-Z.

2.When correct command is inputted to this LSI, this LSI becomes active mode and keeps the active mode until next CSB

rising edge.

COMMAND DESCRIPTION

(1) Read Array

This command is sent with the 4-byte address (command included), and the byte address, followed by four dummy bytes
sent to give the device time to stabilize. The device will then send out data starting at the byte address until CS goes
high. The clock to clock out the data is supplied by the master serial peripheral interface.

(2) Standby Mode

When CS is high and there is no operation in progress, the device is put in standby mode. Typical standby current is less
than 30uA.

ADDRESS SEQUENCE

The address assignment is described as follows :

BA: Byte address Bit sequence:

AD1:First Address Bit sequence:

A19

A18

A17

AD2:Second Address Bit sequence:

A16

A15

A14

A13

A12

A11

A10

AD3:Thrid Address Bit sequence:

DATA SEQUENCE

Output data is serially sent out through SO pin, synchronized with the rising edge of SCLK, whereas input data is serially
read in through SI pin, synchronized with the rising edge of SCLK. The bit sequence for both input and output data is bit
7 (MSB) first, then bit 6, bit 5, ...., and bit 0.(LSB)

P/N: PM0838

REV. 1.1, JUN. 23, 2003

MX23L8051

NOTICE:
1.Stresses greater than those listed under ABSOLUTE
MAXIMUM RATINGS may cause permanent damage to the
device. This is stress rating only and functional operational
sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended period may
affect reliability.

2.Specifications contained within the following tables are
subject to change.

3.During voltage transitions, all pins may overshoot to 4.6V or
-0.5V for period up to 20ns.

4.All input and output pins may overshoot to VCC+0.5V while
VCC+0.5V is smaller than or equal to 4.6V.

RATING

VALUE

Ambient Operating Temperature

C to 70

Storage Temperature

-55

C to 125

Applied Input Voltage

-0.5V to 4.6V

Applied Output Voltage

-0.5V to 4.6V

VCC to Ground Potential

-0.5V to 4.6V

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL SPECIFICATIONS

CAPACITANCE TA = 25

C, f = 1.0 MHz

SYMBOL

PARAMETER

MIN.

TYP

MAX.

UNIT

CONDITIONS

CIN

Input Capacitance

VIN = 0V

COUT

Output Capacitance

VOUT = 0V

Maximum Negative Overshoot Waveform

-0.5V

20ns

Maximum Positive Overshoot Waveform

4.6V

3.6V

20ns

Part Number MX23L8051