AT24C02EEPROM驱动_AT24C32资源-CSDN文库

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AT24C02

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Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016

Features

 Low-voltage Operation

 V

= 1.7V to 5.5V

 Internally Organized as 128 x 8 (1K) or 256 x 8 (2K)

 I

C Compatible (2-wire) Serial Interface

 Schmitt Trigger, Filtered Inputs for Noise Suppression

 Bidirectional Data Transfer Protocol

 400kHz (1.7V) and 1MHz (2.5V, 2.7V, 5.0V) Compatibility

 Write Protect Pin for Hardware Data Protection

 8-byte Page Write Mode

 Partial Page Writes Allowed

 Self-timed Write Cycle (5ms max)

 High-reliability

 Endurance: 1,000,000 Write Cycles

 Data Retention: 100 Years

 Green Package Options (Pb/Halide-free/RoHS-compliant)

 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, 5-lead

SOT23, and 8-ball VFBGA

 Die Sale Options: Wafer Form and Tape and Reel Available

Description

The Atmel

AT24C01C/02C provides 1024/2048-bits of Serial Electrically

Erasable and Programmable Read-Only Memory (EEPROM) organized as

128/256 words of eight bits each. Both devices include a cascading feature that

allows up to eight devices to share a common 2-wire bus. These devices are

optimized for use in many industrial and commercial applications where low

power and low voltage operation are essential. The AT24C01C/02C are available

in space saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-lead UDFN,

5-lead SOT23, and 8-ball VFBGA packages. In addition, the entire family

operates from 1.7V to 5.5V V

AT24C01C and AT24C02C

C-Compatible (2-wire) Serial EEPROM

1-Kbit (128 x 8), 2-Kbit (256 x 8)

DATASHEET

AT24C01C/02C [DATASHEET]

Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016

1. Pin Configurations and Pinouts

Table 1-1. Pin Descriptions

Note: 1. For use of 5-lead SOT23, the software A2, A1, and A0 bits in the device address word must be set to zero to

properly communicate.

Number

Symbol

Pin Name and Functional Description

Asserted

State

Type

1, 2, 3 A

– A

Address Inputs: The A

, A

, and A

pins are device address inputs that

are hard wired. As many as eight 1-Kbit or 2-Kbit devices may be

addressed on a single bus system.

— Input

4 GND

Ground: The ground reference for the power supply. GND should be

connected to the system ground.

— Power

5 SDA

Serial Data: The SDA pin is bidirectional 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.

—

Input/

Output

6 SCL

Serial Clock Input: The SCL input is used to positive edge clock data

into each EEPROM device and negative edge clock data out of each

device.

— Input

7 WP

Write Protect: Provides hardware data protection. The Write Protect pin

allows normal read/write operations when connected to Ground (GND).

When the Write Protect pin is connected to V

, the write protection

feature is enabled and operates as shown in Table 5-1.

Input

8 V

Device Power Supply: The V

pin is used to supply the source voltage

to the device. Operations at invalid V

voltages may produce spurious

results and should not be attempted.

— Power

Note: Package drawings are not to scale.

Top View

8-pad UDFN

GND

SCL

SDA

SCL

SDA

GND

8-ball VFBGA

Top View

8-lead TSSOP

Top View

GND

SCL

SDA

Top View

SCL

GND

SDA

5-lead SOT23

GND

SCL

SDA

8-lead SOIC

Top View

8-lead PDIP

GND

SCL

SDA

AT24C01C/02C [DATASHEET]

Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016

2. Block Diagram

Figure 2-1. Block Diagram

3. Absolute Maximum Ratings

Start

Stop

Logic

GND

SCL

SDA

Serial

Control

Logic

H.V. Pump/Timing

EEPROM

Data Recovery

Serial MUX

X DEC

OUT

/ACK

Logic

COMP

LOAD

INC

Data Word

Addr/counter

Y DEC

R/W

OUT

LOAD

Device

Address

Comparator

Operating Temperature . . . . . . . . . . .-55C to +125C

Storage Temperature . . . . . . . . . . . . .-65C to +150C

Voltage on any pin

with respect to ground . . . . . . . . . . . . . -1.0V to +7.0V

Maximum Operating Voltage . . . . . . . . . . . . . . . 6.25V

DC Output Current . . . . . . . . . . . . . . . . . . . . . . .5.0mA

*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 is not implied. Exposure to

absolute maximum rating conditions for

extended periods may affect device reliability.

AT24C01C/02C [DATASHEET]

Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016

4. Memory Organization

AT24C01C, 1K Serial EEPROM: Internally organized with 16 pages of eight bytes each, the 1K requires a 7-bit

data word address for random word addressing.

AT24C02C, 2K Serial EEPROM: Internally organized with 32 pages of eight bytes each, the 2K requires an

8-bit data word address for random word addressing.

4.1 Pin Capacitance

Table 4-1. Pin Capacitance

(1)

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

4.2 DC Characteristics

Table 4-2. DC Characteristics

Note: 1. V

min and V

max are reference only and are not tested.

Applicable over recommended operating range from T

= 25C, f = 1.0MHz, V

= 1.7V to 5.5V.

Symbol Test Condition Max Units Conditions

I/O

Input/Output Capacitance (SDA) 8 pF V

I/O

= 0V

Input Capacitance (A

, A

, SCL) 6 pF V

= 0V

Applicable over recommended operating range from: T

= -40°C to +85°C, V

= 1.7V to 5.5V (unless otherwise noted).

Symbol Parameter Test Condition Min Typ Max Units

CC1

Supply Voltage 1.7 5.5 V

CC2

Supply Voltage 2.5 5.5 V

CC3

Supply Voltage 4.5 5.5 V

CC1

Supply Current V

= 5.0V Read at 400kHz 0.4 1.0 mA

CC2

Supply Current V

= 5.0V Write at 400kHz 2.0 3.0 mA

SB1

Standby Current V

= 1.7V V

= V

or V

1.0 μA

SB2

Standby Current V

= 2.5V V

= V

or V

2.0 μA

SB3

Standby Current V

= 5.5V V

= V

or V

6.0 μA

Input Leakage Current V

= V

or V

0.10 3.0 μA

Output Leakage Current V

OUT

= V

or V

0.05 3.0 μA

Input Low Level

(1)

-0.6 V

x 0.3 V

Input High Level

(1)

x 0.7 V

+ 0.5 V

OL1

Output Low Level V

= 1.7V I

= 0.15mA 0.2 V

OL2

Output Low Level V

= 3.0V I

= 2.1mA 0.4 V

AT24C01C/02C [DATASHEET]

Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016

4.3 AC Characteristics

Table 4-3. AC Characteristics

Note: 1. This parameter is ensured by characterization only.

2. AC measurement conditions:

 R

(connects to V

): 1.3 k (2.5V, 5V), 10 k (1.7V)

 Input pulse voltages: 0.3 V

to 0.7 V

 Input rise and fall times:  50ns

 Input and output timing reference voltages: 0.5 V

Applicable over recommended operating range from T

= -40C to +85C, V

= 1.7V to 5.5V, CL = 1TTL Gate and 100pF

(unless otherwise noted). Test conditions are listed in Note 2.

Symbol Parameter

1.7V 2.5V, 5.0V

UnitsMin Max Min Max

SCL

Clock Frequency, SCL 400 1000 kHz

LOW

Clock Pulse Width Low 1.2 0.4 μs

HIGH

Clock Pulse Width High 0.6 0.4 μs

Noise Suppression Time 100 50 ns

Clock Low to Data Out Valid 0.1 0.9 0.05 0.55 μs

BUF

Time the bus must be free before a

new transmission can start.

1.2 0.5 μs

HD.STA

Start Hold Time 0.6 0.25 μs

SU.STA

Start Setup Time 0.6 0.25 μs

HD.DAT

Data In Hold Time 0 0 μs

SU.DAT

Data In Setup Time 100 100 ns

Inputs Rise Time

(1)

0.3 0.3 μs

Inputs Fall Time

(1)

300 100 ns

SU.STO

Stop Setup Time 0.6 .25 μs

Data Out Hold Time 50 50 ns

Write Cycle Time 5 5 ms

Endurance

(1)

3.3V, +25C, Page Mode 1,000,000 Write Cycles

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