Overview
The ULN2064B is a high-voltage, high-current Darlington array manufactured by STMicroelectronics. It is designed to interface low-level logic signals with a variety of high current, high voltage loads. Each device contains four NPN Darlington switches, capable of delivering up to 1.5 A with a minimum breakdown voltage of 50 V and a sustaining voltage of 35 V measured at 100 mA. The ULN2064B is particularly useful for driving loads such as relays, solenoids, DC and stepper motors, magnetic print hammers, and multiplexed LED and incandescent displays.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current (IOUT) | 1.5 A | A |
| Minimum Breakdown Voltage (VCEX) | 50 V | V |
| Sustaining Voltage (VCE(SUS)) | 35 V | V |
| Input Voltage (VIN) | Up to 15 V (ULN2064B, ULN2068B, ULN2074B), 6-15 V (ULN2066B) | V |
| Input Current (II) | 25 mA | mA |
| Operating Temperature Range | -40 to 85 °C | °C |
| Package Type | PowerDIP-16 | |
| Power Dissipation at TAMB = 70 °C | 1 W | W |
Key Features
- Output current up to 1.5 A for each Darlington switch
- Minimum breakdown voltage of 50 V and sustaining voltage of 35 V
- Integral suppression diodes for inductive loads (ULN2064B, ULN2066B, ULN2068B)
- Isolated Darlington pinout (ULN2074B)
- Compatibility with popular logic families (TTL, DTL, MOS, CMOS)
- Transient-protected outputs
- Heat-sink contact tabs
- Automotive capable
- Pre-driver stage to reduce loading on the control logic (ULN2068B)
Applications
The ULN2064B is suitable for a variety of applications, including:
- Driving relays and solenoids
- Controlling DC and stepper motors
- Operating magnetic print hammers
- Multiplexing LED and incandescent displays
- Heaters and other similar loads
Q & A
- What is the maximum output current of the ULN2064B?
The maximum output current of the ULN2064B is 1.5 A for each Darlington switch.
- What is the minimum breakdown voltage of the ULN2064B?
The minimum breakdown voltage of the ULN2064B is 50 V.
- What types of logic families are compatible with the ULN2064B?
The ULN2064B is compatible with popular logic families including TTL, DTL, MOS, and CMOS.
- Does the ULN2064B have integral suppression diodes?
- What is the operating temperature range of the ULN2064B?
The operating temperature range of the ULN2064B is -40 to 85 °C.
- What package types are available for the ULN2064B?
The ULN2064B is available in PowerDIP-16 packages.
- Can the ULN2064B be used in automotive applications?
- Does the ULN2064B have a pre-driver stage?
No, the ULN2064B does not have a pre-driver stage. However, the ULN2068B version does.
- What is the power dissipation at TAMB = 70 °C for the ULN2064B?
The power dissipation at TAMB = 70 °C for the ULN2064B is 1 W.
- What types of loads can the ULN2064B drive?
The ULN2064B can drive resistive loads up to 480 watts and is suitable for inductive loads such as relays, solenoids, and motors.
