MAX7370_12 datasheet(3/37 Pages) MAXIM

Part #	MAX7370

Description	8 x 8 Key-Switch Controller and LED Driver/GPIOs

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Manufacturer	MAXIM [Maxim Integrated Products]

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�� Maxim Integrated Products 3

MAX7370

8 x 8 Key-Switch Controller and LED Driver/GPIOs

with I2C Interface and High Level of ESD Protection

ELECTRICAL CHARACTERISTICS (continued)

(VCC = 1.62V to 3.6V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25NC.) (Notes 2, 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

10mA Port Sink Current

COL7–COL4

IOL

VOL = 1V

TA = +25NC

8.6

11.4

mA

VCC = 3.3V

9.04

10

10.96

VOL = 0.5V

VCC = 3.6V,

TA = +25NC

9.5

20mA Port Sink Current

COL7–COL4

IOL

VOL = 1V

TA = +25NC

18.13

21.52

mA

VCC = 3.3V

18.47

20

21.34

VOL = 0.5V

VCC = 3.6V,

TA = +25NC

19.05

Input High Voltage

COL_, ROW_

VIH

VS = VCC or VLA depending on

reference logic level setting

0.7 O VS

V

Input Low Voltage

COL_, ROW_

VIL

0.3 O VS

V

Input Leakage Current

COL3–COL0, ROW_

ILEAKAGE Input voltage = VCC or VGND

-2

+2

F

A

Input Leakage Current

COL7–COL4

ILEAKAGE Input voltage = 5V

-1

+1

F

A

Input Capacitance

COL_, ROW_

CIN

20

pF

Maximum Allowable Load Capacitance

for Keyscan Function

N keys pressed simultaneously

500

pF

Output Low Voltage

COL_, ROW_

VOL

VCC = 1.62V and ISINK = 2.5mA

50

100

mV

VCC = 1.62V and ISINK = 5mA

80

250

Output High Voltage

COL3–COL0, ROW_

VOH

VCC = 1.62V and ISOURCE = 2.5mA

VCC -

120

VCC -

40

mV

VCC = 1.62V and ISOURCE = 5mA

VCC -

250

VCC -

70

Output Logic-Low Voltage

(INT)

VOL

ISINK = 6mA

0.6

V

PWM Frequency

fPWM

Derived from oscillator clock

500

Hz

SERIAL-INTERFACE SPECIFICATIONS

Input High Voltage

SDA, SCL, AD0

VIH

0.7 O VCC

V

Input Low Voltage

SDA, SCL, AD0

VIL

0.3 O VCC

V

Input Leakage Current

SDA, SCL, AD0

ILEAKAGE Input voltage = 5.5V or VGND

-1

+1

F

A

Output Logic-Low Voltage

SDA

VOL

ISINK = 6mA

0.6

V

Input Capacitance

SDA, SCL, AD0

CIN

(Notes 4, 5)

10

pF

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