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U3525G-S16-R

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UTC(Unisonic Tech) RF Modulators And Demodulators, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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U3525G-S16-R

UTC(Unisonic Tech) · RF Modulators And Demodulators · SOP-16

U3525G-S16-R from UTC(Unisonic Tech), in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 INV.INPUT input Inverting input of the error amplifier, used with the non-inverting input to set the feedback loop (common-mode range 1.5 to 5.2 V per the error amplifier characteristics).
2 N.I.INPUT input Non-inverting input of the error amplifier, with a common-mode range of 1.5 to 5.2 V and a CMR of 60 dB minimum.
3 SYNC input Oscillator sync terminal with a sync threshold of 1.2 to 2.8 V and a sync input current of up to 2.5 mA at 3.5 V.
4 OSC.OUTPUT output Oscillator clock output with a clock amplitude of 3 to 3.5 V and a clock width of 0.3 to 1 µs.
5 CT passive Oscillator timing capacitor terminal, with a recommended range of 0.001 to 0.1 µF and a maximum current through the CT terminal of 5 mA.
6 RT passive Oscillator timing resistor terminal, with a recommended range of 2 to 150 kΩ.
7 DISCHARGE passive Discharge terminal for the oscillator dead-time circuit, used with the dead-time resistor RD whose range is 0 to 500 Ω.
8 SOFT-START passive Soft-start terminal with a current-source pull-up of 25 to 80 µA, which charges the external soft-start capacitor and is discharged during shutdown.
9 COMP output Error amplifier output and PWM comparator input for loop compensation; it can be pulled down by a signal sinking at most 100 µA to turn the outputs off.
10 SHUT DOWN input Shutdown input that immediately sets the PWM latch and starts a 150 µA sink discharging the soft-start capacitor on longer commands, and it must not be left floating.
11 OUTPUT A output Totem-pole output driver A with NOR logic (LOW for OFF), capable of sourcing or sinking up to 100 mA steady state and 400 mA peak.
12 GROUND power_in Ground reference for the IC.
13 VC power_in Collector supply for the output stages, rated 4.5 to 35 V.
14 OUTPUT B output Totem-pole output driver B with NOR logic (LOW for OFF), capable of sourcing or sinking up to 100 mA steady state and 400 mA peak.
15 +VI power_in Supply input for the IC, rated 8 to 35 V (40 V absolute maximum).
16 VREF power_out On-chip 5.1 V reference output trimmed to ±1%, with a load current of 0 to 20 mA and a 50 mA absolute maximum.

Key specifications

Parameter Value
Manufacturer UTC(Unisonic Tech)
Package SOP-16
Category RF And Wireless
Pins 16

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage ViN 40 V 4
Collector Supply Voltage VC 40 V 4
Oscillator Charging Current IOSC 5 mA 4
Output Current, Source or Sink Io 500 mA 4
Reference Output Current IR 50 mA 4
Current through CT Terminal IT 5 mA 4
Logic Inputs -0.3 5.5 V 4
Analog Inputs -0.3 V 4
Total Power Dissipation PD 1000 mW TA=70 °C 4
Junction Temperature TJ -55 125 °C 4
Operating Ambient Temperature TORP 0 70 °C 4
Storage Temperature TSTG -65 150 °C 4
Input Voltage VIN 8 35 V 4
Collector Supply Voltage VC 4.5 35 V 4
Sink/Source Load Current (Steady State) ISTEAD 0 100 mA 4
Sink/Source Load Current (Peak) IPEAK 0 400 mA 4
Reference Load Current ILOAD 0 20 mA 4
Oscillator Frequency Range FO 100 400 K Hz 4
Oscillator Timing Resistor RO 2 150 KΩ 4
Oscillator Timing Capacitor CO 0.001 0.1 μF 4
Dead Time Resistor Range RT 0 500 Ω 4
Output Voltage VREF 5 5.1 5.2 V TJ= 25°C 5
Total Output Variation 4.95 5.25 V Line, Load and Temperature 5
Line Regulation △VREF 10 20 mV VIN= 8 ~ 35 V 5
Load Regulation △VREF 20 50 mV IL = 0 ~ 20 mA 5
Short Circuit Current 80 100 mA VREF = 0, TJ = 25°C 5
Clock Amplitude 3 3.5 V Note 1, 2 5
Sync Threshold 1.2 2 2.8 V 5
Sync Input Current 1 2.5 mA Sync Voltage = 3.5 V 5
Current Mirror 1.7 2 2.2 mA IRT = 2 mA 5
Clock Width 0.3 0.5 1 μs TJ = 25°C (Note 1, 2) 5
Initial Accuracy -6 2 6 % TJ = 25°C (Note 1, 2) 5
Voltage Stability -2 1 2 % VIN = 8 ~ 35 V (Note 1, 2) 5
Temperature Stability △f /△T -6 3 6 % Over Operating Range (Note 1) 5
Output Low Level 0.2 0.5 V Error amplifier, VCM = 5.1 V 5
Output High Level 3.8 5.6 V Error amplifier, VCM = 5.1 V 5
Input Offset Voltage VOS 2 10 mV Error amplifier, VCM = 5.1 V 5
Input Bias Current Ib 1 10 μA Error amplifier, VCM = 5.1 V 5
Comm. Mode Reject. CMR 60 75 dB VCM = 1.5 ~ 5.2 V 5
Supply Voltage Rejection PSR 50 60 dB VIN = 8 ~ 35 V 5
DC Open Loop Gain 60 75 dB RL ≥10 MΩ 5
DC Transconduct. 1.1 1.5 ms 30 KΩ ≤RL≤1 MΩ, TJ = 25°C (Note 1, 3) 5
Gain Bandwidth Product 1 2 MHz Gv = 0 dB, TJ = 25°C (Note 1) 5
Input Threshold 0.7 0.9 V Zero Duty-cycle (Note 2) 5
Input Threshold 3.3 3.6 V Maximum Duty-cycle (Note 2) 5
Input Bias Current 0.05 1 µA Note 1 5
Maximum Duty-cycle 45 49 % Note 2 5
Soft Start Low Level 0.4 0.7 V VSD = 2.5 V 5
Shutdown Threshold 0.6 0.8 1 V To outputs, VSS = 5.1 V, TJ = 25°C 5
Shutdown Input Current 0.4 1 mA VSD = 2.5 V 5
Soft Start Current 25 50 80 µA VSD = 0 V, VSS = 0 V 5
Output Low Level 0.2 0.4 V VC = 20 V; ISINK = 20 mA 6
Output Low Level 1 2 V VC = 20 V; ISINK = 100 mA 6
Output High Level 18 19 V VC = 20 V; ISOURCE = 20 mA 6
Output High Level 17 18 V VC = 20 V; ISOURCE = 100 mA 6
Under-Voltage Lockout 6 7 8 V VCOMP and VSS = High 6
Rise Time tR 100 600 ns CL = 1 nF, TJ = 25°C (Note 1) 6
Fall Time tF 50 300 ns CL = 1 nF, TJ = 25°C (Note 1) 6
Supply Current IS 14 20 mA VIN = 35 V 6
Thermal Resistance Junction-Ambient θJA 100 °C/W SOP-16 group; junction-alumina, 15×20 mm substrate, infinite heat sink 4

CAD (KiCad official)

  • Symbol: U3525G-S16-R
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOP-16 (KiCad packages3D, STEP)
  • 3D model files: u3525g-s16-r-etched.step / u3525g-s16-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); u3525g-s16-r.step / u3525g-s16-r.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: UTC(Unisonic Tech) datasheet (10 pp, sha256 5868f993bb5f68a1, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF