TL494IDR from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	1IN+	input	Noninverting input to error amplifier 1. Common-mode input range −0.3 V to VCC − 2 V.
2	1IN-	input	Inverting input to error amplifier 1. Common-mode input range −0.3 V to VCC − 2 V.
3	FEEDBACK	input	Feedback / PWM-comparator input. Zero-duty-cycle input threshold ≈4 V; sinks 0.3-0.7 mA at 0.7 V. Ties together error-amp outputs and PWM comparator input.
4	DTC	input	Dead-time control comparator input. Programs the minimum guaranteed off-time between output pulses; 0 V gives ~45% max duty per output, ~3.3 V forces zero duty. Input bias current up to −10 μA (0 to 5.25 V).
5	CT	passive	Oscillator timing capacitor terminal. CT ties from this pin to GND; recommended 0.47 nF to 10 μF. Sets oscillator frequency together with RT (fosc ≈ 1.1/(RT·CT)).
6	RT	passive	Oscillator timing resistor terminal. RT ties from this pin to GND; recommended 1.8 kΩ to 500 kΩ. Sets oscillator charge current with CT for fosc = 1 kHz-300 kHz.
7	GND	power_in	Device ground (0 V reference for all internal circuitry).
8	C1	output	Collector of uncommitted NPN output transistor 1. Sinks/sources up to 200 mA per transistor; VCEO(max) 41 V. Wire as common-emitter (output to VCC via load, E1 to GND) or emitter-follower depending on OUTPUT CTRL setting.
9	E1	output	Emitter of uncommitted NPN output transistor 1. Handles 200 mA source in emitter-follower configuration or ties to GND for common-emitter drive.
10	E2	output	Emitter of uncommitted NPN output transistor 2. 200-mA capable; wired analogously to E1 for single-ended or push-pull drive.
11	C2	output	Collector of uncommitted NPN output transistor 2. Sinks/sources up to 200 mA; VCEO(max) 41 V. Complements C1 in push-pull operation.
12	VCC	power_in	Positive supply. Recommended operating range 7 V to 40 V (absolute max 41 V). Typical standby current 6 mA at VCC = 15 V.
13	OUTPUT CTRL	input	Output configuration select. Tie to GND for parallel single-ended output (both transistors switch in phase); tie to REF (pin 14) for push-pull operation with the internal flip-flop steering alternating pulses to C1/E1 and C2/E2.
14	REF	power_out	Internal 5-V ±5% precision reference output (4.75-5.25 V at IO = 1 mA). Source up to 10 mA to external circuitry; short-circuit current ≈25 mA. Commonly used to bias OUTPUT CTRL and error-amp dividers.
15	2IN-	input	Inverting input to error amplifier 2. Common-mode input range −0.3 V to VCC − 2 V.
16	2IN+	input	Noninverting input to error amplifier 2. Common-mode input range −0.3 V to VCC − 2 V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	PMIC
Pins	16

Ordering variants

Same part, different packaging or reel option.

TL494IDRD
TL494IDR
TL494IDRDB
TL494IDRDBR
TL494IDRN
TL494IDRNS
TL494IDRNSR
TL494IDRPW
TL494IDRPWR

CAD (KiCad official)

Symbol: TL494IDR
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tl494idr.step`	217 KB	You want the bare part, or you mark your own boards.
`tl494idr-etched.step`	1.9 MB	You want the part with `TL494IDR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 496 faces against 267 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Texas Instruments datasheet (35 pp, sha256 62ece39ba0620383, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF