ACE24C04/08A
Two-wire Serial EEPROM
Description
The ACE24C04/08A provides low operation voltage of 4096/8192 bits of serial electrically erasable and
programmable read-only memory (EEPROM) organized as 512/1024 words of 8 bits each. The device is
optimized for use in many industrial and commercial applications where low-power and low-voltage
operations are essential.
Features
Low Operation Voltage: Vcc=1.7V to 5.5V
5V tolerant I/O
Internally Organized: 512x8 (4K), 1024x8 (8K)
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bi-directional Data Transfer Protocol
1MHz(2.5V~5.5V) and 400kHz(1.7V) Compatibility
Write Protect Pin for Hardware Data Protection
16-byte Page Write Modes
Partial Page Writes are Allowed
Self-timed Write Cycle (5 ms max)
High-reliability - Endurance: 1,000,000 Write Cycles
- Data Retention: 100 Years
Absolute Maximum Ratings
Operating Temperature
Storage Temperature
Voltage on Any Pin with Respect to Ground
Maximum Operating Voltage
DC Output Current
-55℃ to +125℃
-65℃ to +150℃
-1.0V to +7.0V
6.25V
5.0 mA
*Notice: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational
sections of this specification are not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
VER 1.5
1
ACE24C04/08A
Two-wire Serial EEPROM
Packaging Type
Pin Configurations
Pin Name
A0~A2
SDA
SCL
WP
V
CC
GND
Function
Device Address Inputs
Serial Data Input / Output
Serial Clock Input
Write Protect
Power Supply
Ground
Block Diagram
Figure 1
VER 1.5
2
ACE24C04/08A
Two-wire Serial EEPROM
Ordering Information
ACE24C04/08A XX + X H
Halogen - free
U : Tube
T : Tape and Reel
Pb - free
DP : DIP-8
FM : SOP-8
TM : TSSOP-8
Pin Description
Serial Clock (SCL):
The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock
data out of each device.
Serial Data (SDA):
The SDA pin is bi-directional for serial data transfer. This pin is open-drain driven and may be
wire-ORed with any number of other open-drain or open-collector devices.
Device/Page Addresses (A2,A1)
The ACE24C04A uses the A2 and A1 inputs for hard wire addressing and a total of four 4K devices
may be addressed on a single bus system. The A0 pin is a no connect and can be connected to
ground (device addressing is discussed in detail under the Device Addressing section).
The ACE24C08A only uses the A2 input for hardware addressing and total of two 8K devices may be
addressed on a single bus system. The A0 and A1 pins are no connects and can be connected to
ground (device addressing is discussed in detail under the Device Addressing section).
Write Protect (WP):
The ACE24C04/08A has a Write Protect pin that provides hardware data protection. The Write Protect pin
allows normal read/write operations when connected to ground (GND). When the Write Protect pin is conceded
to Vcc the write protection feature is enabled.
Write Protect Description
WP Pin Status
WP=V
CC
WP=GND
Part of the Array Protected
ACE24C04A
ACE24C08A
Full (4K) Array
Full (8K) Array
Normal Read / Write Operations
VER 1.5
3
ACE24C04/08A
Two-wire Serial EEPROM
Memory Organization
ACE24C04A, 4K SERIAL EEPROM:
Internally organized with 32 pages of 16 bytes each, the 4K requires an 9-bit data word address for
random word addressing.
ACE24C08A, 8K SERIAL EEPROM:
Internally organized with 64 pages of 16 bytes each, the 8K requires an 10-bit data word address for
random word addressing.
Pin Capacitance
Applicable over recommended operating range from: T
A
= 25℃, f = 1.0 MHz, V
CC
= +1.7V.
Symbol
C
I/O 1
C
IN 1
Test Condition
Input / Output Capacitance (SDA)
Input Capacitance (A
0
, A
1
, A
2
, SCL)
Max
8
6
Units
pF
pF
Conditions
V
I/O
= 0V
V
IN
= 0V
Note: This parameter is characterized and is not 100% tested.
DC Characteristics
Applicable over recommended operating range from: T
A
= -40℃ to +85℃, (unless otherwise noted).
Symbol
V
CC
I
CC1
I
CC2
I
SB1
I
SB2
I
LI
I
LO
V
IL1
V
IH1
V
OL2
V
OL1
Parameter
Supply Voltage
Supply Current
Supply Current
Standby Current
Standby Current
Input Leakage Current
Output Leakage Current
Input Low Level
Input High Level
Output Low Level
Output Low Level
Test Condition
Min
1.7
Typ
Max
5.5
Units
V
mA
mA
µA
µA
µA
µA
V
V
V
V
V
CC
= 5.5V, Read at 400K
V
CC
= 5.5V, Write at 400K
V
CC
= 1.7V, V
IN
= V
CC
/ V
SS
V
CC
= 5.5V, V
IN
= V
CC
/ V
SS
V
IN
= V
CC
/V
SS
V
OUT
= V
CC
/ V
SS
-0.6
V
CC
x0.7
V
CC
= 3.0V, I
OL
= 2.1 mA
V
CC
= 1.7V, I
OL
= 0.15 mA
0.4
2.0
3
8
0.10
0.05
1.0
3.0
6.0
18.0
3.0
3.0
V
CC
x0.3
5.5
0.4
0.2
Note: 1.
V
IL
min and
V
IH
max are reference only and are not tested.
VER 1.5
4
ACE24C04/08A
Two-wire Serial EEPROM
AC Characteristics
Applicable over recommended operating range from: T
A
= -40℃ to +85℃, V
CC
= +1.7V to +5.5V, CL = 1 TTL Gate and 100
pF (unless otherwise noted). Test conditions are listed in Note 2.
Symbol
f
SCL
T
LOW
T
HIGH
T
AA
T
BUF1
T
HD.STA
T
SU.STA
T
HD.DAT
T
SU.DAT
T
R
T
F
T
SU.STO
T
DH
T
WR
Endurance
(1)
Parameter
Clock Frequency, SCL
Clock Pulse Width Low
Clock Pulse Width High
Clock Low to Data Out Valid
Time the bus must be free before a new
transmission can Start
Start Hold Time
Start Setup Time
Data In Hold Time
Data In Setup Time
Inputs Rise Time
Inputs Fall Time
Stop Setup Time
Data Out Hold Time
Write Cycle Time
3.6V, 25℃, Page Mode
1.7-volt
2.5-volt
5.5-volt
Min Max Min Max Min Max
400
1.3
0.6
0.4
0.4
1000
0.4
0.4
1000
Units
kHz
µs
µs
µs
µs
µs
µs
µs
ns
0.1 0.9 0.05 0.55 0.05 0.55
1.2
0.6
0.6
0
100
0.3
300
0.6
50
5
0.25
50
5
1,000,000
0.5
0.25
0.25
0
100
0.3
100
0.25
50
5
0.5
0.25
0.25
0
100
0.3
100
µs
ns
µs
ns
ms
Write
Cycles
Notes:1. This parameter is characterized and not 100% tested.
2.AC measurement conditions:
RL (connects to Vcc): 1.3kΩ (2.5V, 5.5V), 10kΩ (1.7V)
Input pulse voltages: 0.3 Vcc to 0.7 Vcc
Input rise and fall times:
≦50
ns
Input and output timing reference voltages: 0.5Vcc
VER 1.5
5
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