L9942 datasheet(16/40 Pages) STMICROELECTRONICS

Part #	L9942

Description	Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile

PDF	40 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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16 / 40 page

Electrical specifications

L9942

16/40

Doc ID 11778 Rev 7

3.4

Electrical characteristics

VS = 7 to 20 V, VCC = 3.0 to 5.3 V, Tj = -40 to 150 °C, IREF = -200 µA, unless otherwise

specified. The voltages are referred to GND and currents are assumed positive, when the

current flows into the pin.

3.4.1

Supply

Table 8.

Supply

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VS DC supply current in active

mode

VS = 13.5 V, EN=VCC outputs

floating

-7

VS quiescent supply current

VS = 13.5 V, TEST,

EN = 0V outputs

floating

Tj = -40 °C

to 25 °C

-3

µA

Tj = 125 °C

-6

ICC

VCC DC supply current in

active mode

VCC = 5.0 V EN=VCC,

DI=CLK=STEP=0V

-1

VCC = 5.0 V TEST;

EN = 0 V; CSN =

VCC no clocks

outputs floating

Tj = -40 °C

to 25 °C

-1

µA

ICC

VCC quiescent supply current

CSN=VCC no

clocks outputs

floating

Tj = 125 °C

-2

µA

VS = 13.5 V, VCC =

5.0 V

Tj = -40 °C

to 25 °C

-4

µA

IS + ICC

Sum quiescent supply current

TEST; EN=0 V

CSN=VCC no

clocks outputs

floating

Tj = 125 °C

-8

tsetPOR

(1)

VCC on set up time

EN = 5 V, CSN=CLK=0V DO

changes from high ohmic to logic

level LOW

µs

This parameter is guaranteed by design.

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