PCF8570 datasheet(9/20 Pages) PHILIPS

9 / 20 page

1999 Jan 06

Philips Semiconductors

Product speciﬁcation

256

× 8-bit static low-voltage RAM with

I2C-bus interface

PCF8570

11 DC CHARACTERISTICS

VDD = 2.5 to 6.0 V; VSS = 0 V; Tamb = −40 to +85 °C; unless otherwise speciﬁed.

Notes

1. The Power-on reset circuit resets the I2C-bus logic when VDD <VPOR. The status of the device after a Power-on reset

condition can be tested by sending the slave address and testing the acknowledge bit.

2. If the input voltages are a diode voltage above or below the supply voltage VDD or VSS an input current will flow; this

current must not exceed

±0.5 mA.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

VDD

supply voltage

2.5

−

6.0

IDD

supply current

standby mode

VI =VDD or VSS;

fSCL = 0 Hz;

Tamb = −25 to +70 °C

−−

µA

operating mode

VI =VDD or VSS;

fSCL = 100 Hz

−−

200

µA

VPOR

Power-on reset voltage

note 1

1.5

1.9

2.3

Inputs, input/output SDA

VIL

LOW level input voltage

note 2

−0.8

−

0.3VDD

VIH

HIGH level input voltage

note 2

0.7VDD

−

VDD + 0.8 V

IOL

LOW level output current

VOL = 0.4 V

−−

ILI

input leakage current

VI =VDD or VSS

−1

−

µA

Inputs A0, A1, A2 and TEST

ILI

input leakage current

VI =VDD or VSS

−250

−

+250

Inputs SCL and SDA

input capacitance

VI =VSS

−−

7pF

Low VDD data retention

VDDR

supply voltage for data retention

−

IDDR

supply current

VDDR =1V

−−

µA

VDDR =1V;

Tamb = −25 to +70 °C

−−

µA

Power-saving mode (see Figs 13 and 14)

IDDR

supply current

TEST = VDD; Tamb =25 °C

−

400

tHD2

recovery time

−

−µs

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