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Texas Instruments UC1865J/883B — Analog & Data Acquisition
Texas Instruments

UC1865J/883B PWM Controller, 50kHz-500kHz, 16-CDIP, Active

MPNUC1865J/883B
End of Life

Unitrode UC1865J/883B switching controller, Step-Up/Step-Down, multi-topology (Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull), 2 outputs, Transistor Driver, 50kHz~500kHz, 22V supply, -55°C~125°C, 16-CDIP (0.300", 7.62mm), Through Hole, Bulk.

$50.86Ref. price · indicative, final on quote
UC1865J/883B datasheet
Packaging16-CDIP (0.300", 7.62mm)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

UC1865J/883B Technical Specifications
ParameterValue
Output typeTransistor Driver
Mounting typeThrough Hole
Voltage - supply (Vcc (Vdd))22V
Frequency50kHz ~ 500kHz
Number of outputs2
Output phases1
Operating temperature-55°C ~ 125°C (TA)
PackageBulk
FunctionStep-Up, Step-Up/Step-Down
TopologyBoost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
Clock syncNo
Case16-CDIP (0.300\", 7.62mm)
Control featuresSoft Start
Output configurationPositive
Synchronous rectifierNo

Product details

Multi-topology PWM controller in a hermetic ceramic DIP

The UC1865J/883B is a current-mode PWM controller from Unitrode (now part of Texas Instruments) built for isolated and non-isolated power topologies. It handles boost, flyback, forward converter, half-bridge, full-bridge, and push-pull designs — a single part that covers a wide range of DC-DC converter architectures. Two transistor-driver outputs deliver complementary or push-pull drive, and the switching frequency is adjustable from 50 kHz to 500 kHz, letting you optimise magnetics size against switching losses. The controller runs on a single 22 V supply rail and includes a soft-start control feature for controlled power-up. The 16-pin ceramic DIP (0.300-inch width, 7.62 mm body) is the standard mil-spec footprint — through-hole assembly, hermetic seal, and full military temperature range from -55°C to 125°C ambient. This package and temperature grade qualify it for avionics, satellite, missile guidance, downhole instrumentation, and other sealed or high-reliability environments where plastic packages are not acceptable.

Switching frequency and topology flexibility

The 50 kHz to 500 kHz switching range is set by an external resistor and capacitor — no clock-sync input on this part, so the converter runs free-running.

22 V supply and soft-start

The UC1865J/883B operates from a single 22 V supply (Vcc/Vdd).

Lifecycle and sourcing

For BOM lines that need a mil-temp PWM controller in a hermetic DIP, this part is a stable, long-term choice.

Frequently asked questions

What is the difference between UC1865J/883B and UC1865J?

The /883B suffix on the UC1865J/883B indicates a military-grade /883 screening and qualification flow — the same base die and function as the UC1865J, but with full MIL-STD-883 processing, burn-in, and traceability. The UC1865J without the /883B suffix is typically a standard commercial or industrial-grade ceramic part without the full mil-screening.

Can UC1865J/883B be used as a replacement for UC1864?

The UC1865J/883B and UC1864 are different PWM controller families with different pinouts and control architectures. The UC1865 is a current-mode controller; the UC1864 is a voltage-mode controller. They are not pin-compatible and should not be treated as direct replacements without a full design review.