24C21 データシートの表示（PDF） - Atmel Corporation

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24C21

2-Wire Serial EEPROM 1K (128 x 8)

Atmel Corporation 

AT24C21

DC Characteristics

Applicable over recommended operating range from: TAI = -40°C to +85°C, TAC = 0°C to +70°C, VCC = +2.5V to +5.5V

(unless otherwise noted).

Symbol

Parameter

Test Condition

Min

Typ

Max

Units

VCC

Supply Voltage

2.5

5.5

V

ICC

Supply Current VCC = 5.0V

READ at 100 KHz

0.4

1.0

mA

ICC

Supply Current VCC = 5.0V

WRITE at 100 KHz

2.0

3.0

mA

ISB

Standby Current .......VCC = 2.5V

VIN = VCC or VSS

.......VCC = 5.0V

VIN = VCC or VSS

3.0

4.0

µA

12.0

30.0

µA

ILI

Input Leakage Current

VIN = VCC or VSS

0.10

1.0

µA

ILO

Output Leakage Current

VOUT = VCC or VSS

0.05

1.0

µA

VIL

Input Low Level(1) SCL, SDA Pin

-0.6

Input Low Level VCLK Pin

VCC ≥ 2.7V

VCC < 2.7V

VCC × 0.3

V

0.8

V

0.2 × VCC

V

VIH

Input High Level(1) SCL, SDA Pin

Input High Level VCLK Pin

VCC × 0.7

2.0

VCC + 0.5

V

V

VOL

Note:

Output Low Level VCC = 3.0V

IOL = 2.1 mA

1. VIL min and VIH max are for reference only and not tested.

0.40

V

Pin Capacitance(1)

Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, VCC = +1.8V.

Symbol

Test Condition

Max

Units

Conditions

CI/O

CIN

Note:

Input/Output Capacitance (SDA)

Input Capacitance (A0, A1, A2, SCL, VCLK)

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

8

pF

6

pF

VI/O = 0V

VIN = 0V

Transmit-Only Mode

Symbol

TVAA

TVHIGH

TVLOW

TVHZ

TVPU

Parameter

Output valid from VCLK

VCLK high-time

VCLK low-time

Mode transition time

Transmit-Only power-up time

2.5-volt

Min

Max

500

4.0

4.7

500

0

Units

ns

µs

µs

ns

ns

3

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