ST7540 datasheet(9/44 Pages) STMICROELECTRONICS

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ST7540

Electrical characteristics

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Electrical characteristics

Table 5. Electrical characteristics

( VDD = +5V, VCC =+9 V, VSS = SVSS = GND = 0V,-40°C ≤TA ≤85°C, TJ < 125°C,

unless otherwise specified)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VDD

Digital supply voltages

5V Digital supply

provided externally

4.75

5.25

VCC

Power supply voltage

7.5

13.5

I(VDD)

Digital input supply

current

Transmission &

receiving mode

(MCLK = 4MHz),no load

3.5

Transmission &

Receiving mode

(MCLK = OFF), no load

1.5

I(VCC)

Power supply current

current with digital

supply provided

externally

TX mode, no load

mArms

RX mode

mArms

UVLO

Under voltage lock out

Threshold on VCC

3.7

3.9

4.1

UVLOHYS

UVLO Hysteresis on

VCC

340

Digital I/O

Rdown

Internal pull down

resistor

-30%

100

+30%

Ω

Rup

Internal pull up resistor

-30%

100

+30%

Ω

Digital I/O - 5V digital supply

VIH

High logic level input

voltage

VIL

Low logic level input

voltage

1.2

VOH

High logic level output

voltage

IOH= -2mA

VDD -

0.45

VOL

Low logic level output

voltage

IOL= 2mA

GND

+ 0.3

Digital I/O - 3.3V digital supply

VIH

High logic level input

voltage

1.4

VIL

Low logic level input

voltage

0.8

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