SI9986CY-T1-E3 - 1A Buffered H-Bridge Motor Driver | Vishay | 8-SOIC
MPN: SI9986CY-T1-E3 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.85 | $28.50 |
| 100 | $2.42 | $242.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.78 | $1,780.00 |
SI9986CY-T1-E3 Overview
A buffered H-bridge is a fully integrated motor driver topology that combines four power MOSFETs in an H configuration with on-chip logic-level buffering and shoot-through protection. The H-bridge family belongs to the broader category of motor drivers and motion controllers, which themselves fall under power management integrated circuits. By integrating the power stage and control logic into one die, the buffered H-bridge eliminates the discrete component count and timing headaches of building an H-bridge from individual MOSFETs and gate drivers.
Key features include TTL-compatible inputs, internal upper/lower shoot-through protection that prevents simultaneous conduction in either half-bridge, and a bipolar power MOSFET output stage. The integrated design requires no external dead-time circuitry, simplifying PCB layout and reducing BOM cost compared to discrete H-bridge implementations. The device also includes thermal protection and operates over a 0C to 150C junction temperature range.
The Si9986 uses an N-channel MOSFET output stage with TTL-compatible logic inputs, allowing direct connection to a microcontroller GPIO without level shifters. The internal charge pump generates the gate drive voltage for the high-side N-channel FETs, while the shoot-through protection ensures that the upper and lower FETs of the same half-bridge cannot turn on simultaneously - a critical feature that prevents destructive cross-conduction currents.
Typical applications include camera lens autofocus mechanisms, iris diaphragm control, small DC brushed motor drives in consumer electronics, and any low-power bidirectional DC motor control where PCB area is at a premium. The 8-SOIC package and minimal external component count make it ideal for space-constrained designs.
When designing with this device, observe the 13.2 V absolute maximum supply voltage and ensure adequate decoupling with a 0.1 uF ceramic capacitor directly at the VDD pin. The output current rating of 1 A continuous assumes room temperature operation; derate outputs will rise above ambient with reduced PCB copper area.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, enabling engineers to make informed sourcing and design decisions.
Drop-in alternatives for SI9986CY-T1-E3 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SI9986CY-E3
✅ Drop-In📋 Reference alternative (not in catalog)
SI9986CY-T1
✅ Drop-In📋 Reference alternative (not in catalog)
SI9986DY-T1-E3
✅ Drop-In📋 Reference alternative (not in catalog)
SI9986CY-T1-E3 Maximum Ratings & Electrical Characteristics
| Output Type | Bipolar Motor Driver Power MOSFET |
| Function | Driver - Fully Integrated, Control and Power Stage |
| Topology | Buffered H-Bridge |
| Output Configuration | Half-Bridge (4 FETs) |
| Supply Voltage | 3.8 V to 13.2 V |
| Continuous Output Current | 1.0 A at VDD = 12 V (room temp) |
| Maximum Switching Frequency | 200 kHz |
| Input Compatibility | TTL-compatible |
| Shoot-Through Protection | Yes (internal) |
| Operating Temperature (Junction) | 0C to 150C |
| Package | 8-SOIC (0.154", 3.90 mm width) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| RoHS Status | Compliant (E3 suffix) |
| Technology | Power MOSFET |
SI9986CY-T1-E3 Pin Configuration
| Pin 1 | IN_A — TTL input A - controls OUT_A direction |
| Pin 2 | IN_B — TTL input B - controls OUT_B direction |
| Pin 3 | GND — Ground return |
| Pin 4 | OUT_A — H-bridge output A (motor terminal) |
| Pin 5 | OUT_B — H-bridge output B (motor terminal) |
| Pin 6 | VDD — Power supply input (3.8-13.2 V) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Typical Applications
SI9986CY-T1-E3 is suitable for 6 applications: Camera Lens Autofocus Actuator Driver, Iris Diaphragm Control, Small DC Brushed Motor Drive, Robotic Actuator Module, Electronic Valve and Solenoid Control, Toys and Hobby RC Servo Replacement.
Camera Lens Autofocus Actuator Driver
Drives VCM and small brushed actuators in compact camera modules with 1 A continuous current and direct TTL GPIO interface from image processor. The 8-SOIC footprint fits the tight pitch constraints of camera module PCBs, while the integrated shoot-through protection prevents cross-conduction that would distort lens position. Internal charge pump eliminates external bootstrap components per Vishay datasheet.
Recommended
Iris Diaphragm Control
Provides bidirectional DC motor drive for adjustable iris diaphragms in security and machine vision cameras. The 3.8-13.2 V supply range covers single Li-ion and 12 V bus systems common in PoE camera designs. TTL inputs interface directly to iris control logic without level shifters, reducing BOM and PCB area.
Recommended
Small DC Brushed Motor Drive
Bidirectional control of small brushed DC motors up to 1 A continuous in consumer electronics, toys, and small appliances. The 200 kHz switching capability supports PWM speed control and torque regulation. Integrated H-bridge eliminates four discrete MOSFETs plus gate drive circuitry per Vishay datasheet.
Recommended
Robotic Actuator Module
Compact bidirectional drive of hobby servo-style DC motors in small robotics and educational platforms. The 8-SOIC package allows through-hole or SMD integration on tiny actuator boards. TTL inputs connect directly to common 3.3 V or 5 V microcontroller GPIO per Vishay datasheet.
Recommended
Electronic Valve and Solenoid Control
Drives small latching or non-latching solenoid valves in fluid control, medical dosing, and dispensing equipment. The 1 A continuous rating covers typical 12 V miniature solenoid coils. Shoot-through protection ensures reliable bidirectional drive of H-bridge output stages per Vishay SI9986 datasheet.
Recommended
Toys and Hobby RC Servo Replacement
Replaces conventional RC servo control electronics with direct H-bridge drive for small brushed gearmotors in hobby applications. The TTL-compatible inputs accept standard RC PWM signals with simple interface circuitry. Wide 3.8-13.2 V supply range supports 1S LiPo to 3-cell alkaline packs.
Recommended
Recommended Products Summary
Engineering reference data for SI9986CY-T1-E3 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SI9986CY-E3 | SI9986CY-T1 | SI9986DY-T1-E3 |
|---|---|---|---|---|
| Package | 8-SOIC (narrow body) | 8-SOIC (narrow body) - same | 8-SOIC (narrow body) - same | 8-SOIC (wide body) |
| Brand | Vishay Siliconix | Vishay Siliconix | Vishay Siliconix | Vishay Siliconix |
| Topology | Buffered H-Bridge | Buffered H-Bridge - same | Buffered H-Bridge - same | Buffered H-Bridge - same |
| Output Current (Continuous) | 1.0 A at 12 V | 1.0 A at 12 V | 1.0 A at 12 V | 1.0 A at 12 V |
| Supply Voltage Range | 3.8 V to 13.2 V | 3.8 V to 13.2 V | 3.8 V to 13.2 V | 3.8 V to 13.2 V |
| Maximum Switching Frequency | 200 kHz | 200 kHz | 200 kHz | 200 kHz |
| Shoot-Through Protection | Yes (internal) | Yes (internal) | Yes (internal) | Yes (internal) |
| Packaging Format | Tape & Reel (TR) | Tube | Tape & Reel (TR) | Tape & Reel (TR) |
| RoHS Compliance | Compliant (E3 finish) | Compliant (E3 finish) | Non-RoHS | Compliant (E3 finish) |
Key Differentiators
- Fully integrated buffered H-bridge with internal charge pump (vs Discrete MOSFET H-bridge design)
- TTL-compatible direct GPIO interface (vs Gate driver IC requiring level shifters)
- 200 kHz maximum switching frequency (vs Standard motor drivers (typically 20-50 kHz))
Design Notes
Estimated: at VDD = 12 V and 1 A continuous load, worst-case on-resistance losses in the high-side + low-side FET path (~2 ohm total Rds_on per Vishay datasheet) dissipate approximately 2.0 W. The 8-SOIC package has theta_JA around 110 C/W on a 1 sq inch copper pour, yielding a junction temperature rise of about 220C above ambient - insufficient without thermal management. Add a copper pour of at least 1 sq inch on the VDD pin and use multiple thermal vias to inner/outer ground planes. For pulsed or intermittent motor loads (e.g. camera autofocus), the average dissipation is much lower and standard PCB thermal management suffices.
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (Pin 6) and a bulk 10 uF tantalum or ceramic capacitor within 5 mm of the supply pin. Keep motor output traces (OUT_A, OUT_B) short and wide to minimize parasitic inductance that can cause ringing when switching inductive loads. Add a 100 nF ceramic bypass on the TTL input lines if long traces or noisy environments are present per Vishay datasheet layout recommendations.
Do not connect the motor outputs to voltages exceeding 13.2 V absolute maximum - the internal charge pump and MOSFET gate oxides can be permanently damaged. Avoid back-driving the outputs through the motor inductance when switching at high PWM frequencies - add Schottky flyback diodes or use the inherent body diodes of the MOSFETs (verify current handling). The TTL-compatible inputs do NOT tolerate 5 V signals above VDD; clamp inputs to within VDD or use a series resistor if mixing logic levels. Do not operate above 150C junction temperature or the thermal protection will trigger.
Compliance Information
RoHS compliant per Vishay product page (E3 lead-free finish). Not AEC-Q100 qualified - this part is targeted at consumer and industrial applications, not automotive. Halogen-free status not explicitly stated in the verified web data; refer to Vishay's full material declaration for confirmation.
