MC33977

www.DataSheet4U.com Freescale Semiconductor Technical Data Document Number: MC33977 Rev. 2.0, 1/2007 Single Gauge Driver The 33977 is a Serial Peripheral Interface (SPI) Controlled, stepper motor gauge driver Integrated Circuit (IC). This monolithic IC consists of a dual H-Bridge coil driver and its associated control logic. The HBridge drivers are used to automatically control the speed, direction, and magnitude of current through the coils of a two-phase instrumentation stepper motor, similar to an MMT-licensed AFIC 6405 of Switec MS-X156.xxx motor. The 33977 is ideal for use in instrumentation systems requiring distributed and flexible stepper motor gauge driving. The device also eases the transition to stepper motors from air core motors by emulating the damped air core pointer movement. Features MMT-Licensed Two-Phase Stepper Motor Compatible Switec MS-X15.xxx Stepper Motor Compatible Minimal Processor Overhead Required Fully Integrated Pointer Movement and Position State Machine with Air Core Movement Emulation 4096 Possible Steady State Pointer Positions 340° Maximum Pointer Sweep Maximum Acceleration of 4500°/s2 Maximum Pointer Velocity of 400°/s Analog Microstepping (12 Steps/Degrees of Pointer Movement) Pointer Calibration and Return to Zero (RTZ) Controlled via 16-Bit SPI Messages Internal Clock Capable of Calibration Low Sleep Mode Current Pb-Free Packaging Designated by suffix code EG 33977 SINGLE GAUGE DRIVER DW SUFFIX EG SUFFIX...