Overview
The SN75469N is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. This device consists of seven npn Darlington pairs, each capable of handling a collector current of 500 mA and high-voltage outputs up to 100 V. The SN75469N is designed to operate directly with CMOS or PMOS logic using supply voltages from 6 to 15 V, thanks to its 10.5-kΩ series base resistor. It is particularly useful for driving inductive loads, such as relays, hammer drivers, lamp drivers, and display drivers (including LED and gas discharge types), as well as line drivers and logic buffers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector Current (Single Output) | 500 | mA |
| High-Voltage Output | 100 | V |
| Series Base Resistor | 10.5 kΩ | |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.9 - 1.1 | V |
| On-state Input Voltage (VI(on)) | 2.4 - 2.7 | V |
| Clamp Diode Forward Voltage (VF) | 1.7 - 2 | V |
| Operating Temperature Range | -40°C to 105°C | |
| Package Types | PDIP (N), SOIC (D) |
Key Features
- High-voltage outputs up to 100 V
- High-current capability with 500 mA per Darlington pair
- Output clamp diodes for switching inductive loads
- Inputs compatible with various types of logic (CMOS, PMOS, TTL)
- 10.5-kΩ series base resistor for operation with CMOS or PMOS at 6 to 15 V supply voltages
- Ability to parallel Darlington pairs for higher current capability
- Common-cathode clamp diodes for suppressing kick-back voltage from inductive loads
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
- Driving motors, solenoids, and other high-current peripherals from MCU or logic devices
Q & A
- What is the maximum collector current per Darlington pair in the SN75469N?
The maximum collector current per Darlington pair is 500 mA. - What is the maximum high-voltage output of the SN75469N?
The maximum high-voltage output is 100 V. - What type of logic is the SN75469N compatible with?
The SN75469N is compatible with CMOS, PMOS, and TTL logic. - What is the purpose of the 10.5-kΩ series base resistor in the SN75469N?
The 10.5-kΩ series base resistor allows the SN75469N to operate directly with CMOS or PMOS using supply voltages from 6 to 15 V. - Can the Darlington pairs in the SN75469N be paralleled for higher current capability?
Yes, the Darlington pairs can be paralleled to achieve higher current capability. - What is the function of the output clamp diodes in the SN75469N?
The output clamp diodes suppress the kick-back voltage from inductive loads when the drivers are turned off. - What is the operating temperature range of the SN75469N?
The operating temperature range is -40°C to 105°C. - What types of packages are available for the SN75469N?
The SN75469N is available in PDIP (N) and SOIC (D) packages. - Can the SN75469N be used to drive motors and solenoids?
Yes, the SN75469N can be used to drive motors, solenoids, and other high-current peripherals from MCU or logic devices. - What is the typical use case for the SN75469N in driving inductive loads?
The SN75469N is typically used to drive inductive loads such as motors, solenoids, and relays, and it includes internal free-wheeling diodes to suppress kick-back voltage.
