AT24CM02 datasheet(11/34 Pages) MICROCHIP

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Parameter

Symbol

Standard Mode

Fast Mode

Fast Mode Plus

Units

VCC = 1.7V to 5.5V

VCC = 2.5V to 5.5V

Min.

Max.

Min.

Max.

Min.

Max.

Write-Protect Setup Time

tSU.WP

4,000

—

600

—

250

—

Write-Protect Hold Time

tHD.WP

4,000

—

600

—

250

—

Data Out Hold Time

tDH

100

—

Write Cycle Time

tWR

—

Notes:

AC measurement conditions:

– CL: 100 pF

– RPUP (SDA bus line pull-up resistor to VCC): 1.3 kΩ (1000 kHz), 4 kΩ (400 kHz), 10 kΩ (100 kHz)

– Input pulse voltages: 0.3 x VCC to 0.7 x VCC

– Input rise and fall times: ≤50 ns

– Input and output timing reference voltages: 0.5 x VCC

These parameters are determined through product characterization and are not 100% tested in production.

Figure 4-1. Bus Timing

SCL

SDA In

SDA Out

HIGH

LOW

BUF

SU.STO

SU.DAT

HD.DAT

HD.STA

SU.STA

4.5

Electrical Specifications

4.5.1

Power-Up Requirements and Reset Behavior

During a power-up sequence, the VCC supplied to the AT24CM02 should monotonically rise from GND to the

minimum VCC level, as specified in Table 4-1, with a slew rate no faster than 0.1 V/µs.

4.5.1.1

Device Reset

To prevent inadvertent write operations or any other spurious events from occurring during a power-up sequence, the

AT24CM02 includes a Power-on Reset (POR) circuit. Upon power-up, the device will not respond to any commands

until the VCC level crosses the internal voltage threshold (VPOR) that brings the device out of Reset and into Standby

mode.

The system designer must ensure the instructions are not sent to the device until the VCC supply has reached a

stable value greater than or equal to the minimum VCC level. Additionally, once the VCC is greater than or equal to the

minimum VCC level, the bus host must wait at least tPUP before sending the first command to the device. See Table

4-4 for the values associated with these power-up parameters.

AT24CM02

Electrical Characteristics

Datasheet

DS20006197C-page 11

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