Key facts
- Brand
- Motorola
- Model
- 33991
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2012-08-03
Start here
Motorola MC33991 Gauge Driver Integrated Circuit Datasheet
The Motorola MC33991 is a single packaged, Serial Peripheral Interface (SPI) controlled, dual stepper motor gauge driver Integrated Circuit (IC). This monolithic IC consists of four dual output H-Bridge coil drivers and the associated control logic. Each pair of H-Bridge drivers is used to automatically control the speed, direction and magnitude of current through the two coils of a 2-phase instrumentation stepper motor. The device is ideal for use in automotive instrumentation systems requiring distributed and flexible stepper motor gauge driving.
Read onlineMotorola 33991 specifications
| Power Input Supply Voltage Range | 6.5—26.0 V |
|---|---|
| Logic Supply Voltage Range | 4.5 5.0 5.5 V |
| Maximum Pointer Speed | 400 deg/s |
| Maximum Pointer Acceleration | 4500 deg/s2 |
| Output Current Limit | 40 100 170 mA |
Source: Motorola MC33991 Gauge Driver Integrated Circuit Datasheet
All Motorola 33991 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the primary function of the MC33991?
It is a dual stepper motor gauge driver integrated circuit designed for automotive instrumentation systems.
From: Motorola MC33991 Gauge Driver Integrated Circuit Datasheet
How does the device emulate air core motors?
It uses a fully integrated pointer movement and position state machine with air core movement emulation.
From: Motorola MC33991 Gauge Driver Integrated Circuit Datasheet
Do I need a simple microcontroller to drive small stepper motors?
Yes, the MC33991 is designed for use with a simple microcontroller via its 16‑bit SPI interface.
What if I have power‑supply constraints?
The IC features low sleep‑mode current and a typical IDD of only 30 mA, reducing power consumption.