ACE93C46

Three-wire Serial EEPROM

VER 1.2

5

Symbol

Parameter

Test Condition

Min

Typ Max

Units

tdih

DI Hold Time

Relative to

SK

4.5≦Vcc≦5.5v

2.7≦Vcc≦5.5V

1.8V≦Vcc≦5.5V

100

100

400

ns

tpd1

Output Delay to “1”

AC Test

4.5≦Vcc≦5.5v

2.7≦Vcc≦5.5V

1.8V≦Vcc≦5.5V

250

250

1000

ns

tpd0

Output Delay to “0”

AC Test

4.5≦Vcc≦5.5v

2.7≦Vcc≦5.5V

1.8V≦Vcc≦5.5V

250

250

1000

ns

tsv

CS to Status Valid

AC Test

4.5≦Vcc≦5.5v

2.7≦Vcc≦5.5V

1.8V≦Vcc≦5.5V

250

250

1000

ns

tdf

CS to DO in High

Impedance

AC Test

CS=VIL

4.5≦Vcc≦5.5v

2.7≦Vcc≦5.5V

1.8V≦Vcc≦5.5V

100

100

400

ns

twp

Write Cycle Time

1.5

5

ms

Endurance

(1)

5.0V, 25℃

1M

Write

Cycle

Note: 1. This parameter is characterized and is not 100% tested.

Functional Description

The ACE93C46 is accessed via a simple and versatile three-wire serial communication interface. Device operation is

controlled by seven instructions issued by the host processor. A valid instruction starts with a rising edge of CS and

consists of a start bit (logic“1”) followed by the appropriate op code and the desired memory address location.

Instruction Set for the ACE93C46

Address

Data

Instruction

SB

OP

Code

*8

*16

*8

*16

Comments

READ

1

10

Read data stored in memory, at

specified address

EWEN

1

00

11XXXXX

11XXXX

Write enable must precede all

programming modes

REASE

1

11

Erase memory location An-A0

WRITE

1

01

Writes memory location An-A0

ERAL

1

00

10XXXXX

10XXXX

Erases all memory locations. Valid

only at VCC=4.5V to 5.5V

WRAL

1

00

01XXXXX

01XXXX

Writes all memory locations. Valid