# TL494IN

**HGSEMI** · DC-DC Converters · DIP-16

TL494IN from HGSEMI, in a DIP-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 | INPP | input | Error amplifier 1 non-inverting input, with input voltage range of -0.3 V to Vcc-2.0 V. |
| 2 | INNP | input | Error amplifier 1 inverting input, with input voltage range of -0.3 V to Vcc-2.0 V. |
| 3 | INfc | input | PWM comparator feedback input, with recommended feedback current of 0.3 mA maximum and a zero-duty input threshold of 4 to 4.5 V. |
| 4 | DTC | input | Dead-time control input, with zero-duty threshold of 3 to 3.3 V and input bias current of -2.0 to -10 µA for 0 to 5.25 V input. |
| 5 | CT | passive | Oscillator timing capacitor connection, recommended 0.00047 to 10 µF. |
| 6 | RT | passive | Oscillator timing resistor connection, recommended 1.8 to 500 kΩ. |
| 7 | GND | power_in | Ground. |
| 8 | C1 | passive | Output transistor 1 collector, rated up to 40 V and 200 mA. |
| 9 | E1 | output | Output transistor 1 emitter, sources or sinks up to 200 mA. |
| 10 | E2 | output | Output transistor 2 emitter, sources or sinks up to 200 mA. |
| 11 | C2 | passive | Output transistor 2 collector, rated up to 40 V and 200 mA. |
| 12 | Vcc | power_in | Supply voltage input, recommended 7.0 to 40 V (absolute maximum 40 V). |
| 13 | OUTcon | input | Output control input selecting push-pull or single-ended operation, with input current of 0.2 to 3.5 mA at Voc=Vref. |
| 14 | Vref | power_out | 5 V reference output (4.75 to 5.25 V) with recommended output current up to 10 mA. |
| 15 | INNP | input | Error amplifier 2 inverting input, with input voltage range of -0.3 V to Vcc-2.0 V. |
| 16 | INPP | input | Error amplifier 2 non-inverting input, with input voltage range of -0.3 V to Vcc-2.0 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | DIP-16 |
| Category | Power Management (PMIC) |
| 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 | Vcc | 7 | 15 | 40 | V |  | 3 |
| Collector output voltage | Vc1;Vc2 |  |  | 40 | V |  | 3 |
| Collector output current (single transistor) | Ic1;Ic2 |  |  | 200 | mA |  | 3 |
| Amplifier input voltage | Vin | -0.3 |  |  | V |  | 3 |
| Feedback current | Ifb |  |  | 0.3 | mA |  | 3 |
| Reference output current | Iref |  |  | 10 | mA |  | 3 |
| Timing resistance | RT | 1.8 | 30 | 500 | kΩ |  | 3 |
| Timing capacitance | CT | 0.00047 | 0.001 | 10 | µF |  | 3 |
| Oscillation frequency | fosc | 1 | 40 | 200 | kHz |  | 3 |
| Supply voltage | Vcc | 7 |  | 40 | V |  | 3 |
| Collector output voltage | Vc1;Vc2 |  |  | 40 | V |  | 3 |
| Collector output current (single transistor) | Ic1;Ic2 |  |  | 200 | mA |  | 3 |
| Amplifier input voltage | Vin | -0.3 |  |  | V |  | 3 |
| Power dissipation | PD |  |  | 500 | mW | Tamb≤45℃ | 3 |
| Operating ambient temperature (TL494I) | Tamb | -40 |  | 85 | ℃ | TL494I | 3 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 3 |
| Lead temperature (soldering) | TLEAD |  |  | 260 | ℃ | soldering 10s | 3 |
| Reference voltage | Vref | 4.75 | 5 | 5.25 | V | Io=1.0mA | 4 |
| Reference voltage drift over temperature | Vref/T |  | 1.3 | 2.6 | % | Tamb from MIN to MAX | 4 |
| Line regulation | Reg line |  | 2 | 25 | mV | Vcc=7.0V~40V | 4 |
| Load regulation | Reg load |  | 2 | 15 | mV | Io=1.0mA~10mA | 4 |
| Short-circuit output current | Isc |  | 32 |  | mA | Vref=0V, Tamb=25℃ | 4 |
| Collector off-state leakage current | Ic(off) |  | 2 | 100 | µA | Vcc=40V; Vce=40V | 4 |
| Emitter off-state leakage current | Ie(off) |  | -100 |  | µA | Vcc=40V; Vc=40V; Ve=0V | 4 |
| Collector-emitter saturation voltage (common emitter) | Vc(sat) |  | 1.1 | 1.3 | V | Ve=0V; Ic=200mA | 4 |
| Emitter-follower saturation voltage | Ve(sat) |  | 1.5 | 2.5 | V | Vc=15V; Ie=-200mA | 4 |
| Output control pin current | IOCH |  | 0.2 | 3.5 | mA | Voc=Vref | 4 |
| Output voltage rise time (common emitter) | Tr |  | 100 | 200 | ns | Test figure 3 | 4 |
| Output voltage rise time (emitter follower) | Tr |  | 100 | 200 | ns | Test figure 4 | 4 |
| Output voltage fall time (common emitter) | Tf |  | 25 | 100 | ns | Test figure 3 | 4 |
| Output voltage fall time (emitter follower) | Tf |  | 40 | 100 | ns | Test figure 4 | 4 |
| Input offset voltage | Vio |  | 2 | 10 | mV | Vo (pin3)=2.5V | 4 |
| Input offset current | Iio |  | 5 | 250 | nA | Vo (pin3)=2.5V | 4 |
| Input bias current | IIB |  | 0.1 | 1 | µA | Vo (pin3)=2.5V | 4 |
| Input common-mode voltage range | VICR | -0.3 |  |  | V | Vcc=7.0V~40V | 4 |
| Open-loop voltage gain | GVOL |  | 70 | 95 | dB | Vo=0.5V~3.5V; RL=2.0k; Vo=3.0V | 4 |
| Common-mode rejection ratio | CMRR |  | 65 | 90 | dB | Vcc=40V | 4 |
| Output sink current (error amplifier) | Io- |  | 0.3 | 0.7 | mA | Vo (pin3)=0.7V | 4 |
| Output source current (error amplifier) | Io+ |  | -2 | -4 | mA | Vo (pin3)=3.5V | 4 |
| PWM comparator input threshold voltage | VTH |  | 4 | 4.5 | V | Zero duty cycle | 4 |
| Input sink current (PWM comparator) | II- |  | 0.3 | 0.7 | mA | V (pin3)=0.7V | 4 |
| Dead-time control input bias current | IIB(DT) |  | -2 | -10 | µA | Vin=0V~5.25V | 4 |
| Input threshold voltage (pin4), zero duty cycle | VTH |  | 3 | 3.3 | V | Zero duty cycle | 4 |
| Input threshold voltage (pin4), maximum duty cycle |  |  | 0 |  |  |  | 4 |
| Standard frequency offset | fosc |  | 3 |  | % | RT=30k; CT=0.001µF | 5 |
| Frequency variation with supply voltage | fosc/V |  | 0.1 |  | % | Vcc=7.0V~40V | 5 |
| Frequency variation with temperature | fosc/T |  | 12 |  | % | RT=12k; CT=0.01µF; Tamb=Tlow~Thigh | 5 |
| Low-current input (start control) | ISTL |  | -25 | -200 | µA | V (pin3)=0.4V | 5 |
| High-current input (start control) | ISTH |  | 25 | 200 | µA | V (pin13)=2.4V | 5 |
| Standby supply current | Icc |  | 6 | 10 | mA | Vcc=15V; pin6 at Vref, other inputs and outputs open | 5 |
| Standby supply current | Icc |  | 9 | 15 | mA | Vcc=40V; pin6 at Vref, other inputs and outputs open | 5 |
| High-current input (start control), V(pin13)=Vref | ISTH |  | 75 |  | µA | V (pin13)=Vref | 5 |
| Maximum duty cycle (each output) | DCmax |  | 45 |  | % | Vin=0V; RT=12k; CT=0.1µF | 4 |
| Oscillation frequency | fosc |  | 10 |  | kHz | RT=12k; CT=0.01µF | 5 |
| Average supply current |  |  | 7.5 |  | mA | Vcc=15V; RT=12k; CT=0.01µF; V (pin14)=2.0V | 5 |

## CAD (KiCad official)

- Symbol: `TL494IN`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files: `tl494in-etched.step` / `tl494in-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl494in.step` / `tl494in.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8615629852196155392) (12 pp, sha256 `99e3d620b7c82bbd`, retrieved 2026-10-15, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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](docs/tl494in-datasheet.pdf)