# HG741N

**HGSEMI** · Operational Amplifier · DIP-8

HG741N from HGSEMI, in a DIP-8. 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 | OFFSET NULL | passive | Offset null terminal, connected with a 10 kΩ potentiometer whose wiper goes to V- to trim the input offset voltage (adjustment range ±15 mV typ at VS=±20V). |
| 2 | INVERTING INPUT | input | Inverting input of the op amp, with differential input voltage limited to ±30V and input voltage to ±15V (not exceeding the supply voltage when supplies are below ±15V). |
| 3 | NON-INVERTING INPUT | input | Non-inverting input of the op amp, with differential input voltage limited to ±30V and input voltage to ±15V (not exceeding the supply voltage when supplies are below ±15V). |
| 4 | V- | power_in | Negative supply pin, with the supply voltage limited to ±22V absolute maximum. |
| 5 | OFFSET NULL | passive | Offset null terminal, connected with a 10 kΩ potentiometer whose wiper goes to V- to trim the input offset voltage (adjustment range ±15 mV typ at VS=±20V). |
| 6 | OUTPUT | output | Op amp output with continuous short-circuit protection and typical short-circuit current of 25 mA at TA=25°C. |
| 7 | V+ | power_in | Positive supply pin, with the supply voltage limited to ±22V absolute maximum. |
| 8 | NC | unconnected | No internal connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | DIP-8 |
| Category | Operational Amplifier/Comparator |
| Pins | 8 |

## 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 |  | -22 |  | 22 | V |  | 3 |
| Power Dissipation |  |  |  | 500 | mW | Note 2 | 3 |
| Differential Input Voltage |  | -30 |  | 30 | V |  | 3 |
| Input Voltage |  | -15 |  | 15 | V | Note 3 | 3 |
| Operating Temperature Range |  | 0 |  | 70 | ˚C |  | 3 |
| Junction Temperature |  |  |  | 150 | ˚C |  | 3 |
| Soldering Information |  |  |  | 260 | ˚C | 10 seconds | 3 |
| Storage Temperature Range |  | -65 |  | 150 | ˚C |  | 3 |
| ESD Tolerance |  |  |  | 400 | V | Note 7 | 3 |
| Junction to Ambient Thermal Resistance (DIP(B)) | θjA |  | 100 |  | ˚C/W | DIP(B) package, junction to ambient | 5 |

## CAD (KiCad official)

- Symbol: `HG741N`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `hg741n-etched.step` / `hg741n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hg741n.step` / `hg741n.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](docs/hg741n-datasheet.pdf) (9 pp, sha256 `1f62f769ec73d28f`, retrieved 2026-11-04, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/hg741n-datasheet.pdf)