ACE24LA1024A

Two-wire Serial EEPROM

VER 1.3

10

Read identification page: The Identification Page (256 bytes) is an additional page which can be written

and (later) permanently locked in Read-only mode.

The Identification Page can be read by issuing an Read Identification Page instruction. This instruction

uses the same protocol and format as the Random Address Read (from memory array) with device type

identifier defined as 1011b. The MSB address bits B16/B8 are don't care, the LSB address bits B7/B0

define the byte address inside the Identification Page. The number of bytes to read in the ID page must

not exceed the page boundary (e.g.: when reading the Identification Page from location 10d, the number

of bytes should be less than or equal to 246, as the ID page boundary is 256 bytes)

Lock Identification Page: The Lock Identification Page instruction (Lock ID) permanently locks the

Identification page in Read-only mode. The Lock ID instruction is similar to Byte Write (into memory array)

with the following specific conditions:

Device type identifier = 1011b

Address bit B10 must be ‘1’; all other address bits are don't care

The data byte must be equal to the binary value xxxx xx1x, where x is don't care

DC Characteristics

Parameter

Symbol

Min

Typ

Max

Units

Condition

Supply Voltage

2.0

5.5

V

Supply Current VCC=5.0V

0.26

0.5

mA

READ at 400KHZ

Supply Current VCC=5.0V

0.28

0.5

mA

WRITE at 400KHZ

Supply Current VCC=5.0V

0.03

0.5

μA

Input Leakage Current

0.10

1.0

μA

Output Leakage Current

0.05

1.0

μA

Input Low Level

-0.3

VCC×0.3

V

Input High Level

VCC×0.7

VCC+0.3

V

Output Low Level VCC=1.7V

0.2

V

Output Low Level VCC=5.0V

0.4

V

Pin Capacitance

Parameter

Symbol

Max

Units

Condition

Input/Output Capacitance(SDA)

CI/O

8

pF

Input Capacitance(A1,A2,SCL)

CIN

6

pF