# WH-LTE-7S1

**USR IOT** · 2G/3G/4G/5G Modules · DIP-24

WH-LTE-7S1 from USR IOT, in a DIP-24. 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 | LINKA | output | Indicates whether the first network connection (Socket A) is established, outputting high level when connected and low level when not connected. |
| 2 | LINKB | output | Indicates whether the second network connection (Socket B) is established, outputting high level when connected and low level when not connected. |
| 3 | USB_DM | bidirectional | USB D- data line (I/O). |
| 4 | USB_DP | bidirectional | USB D+ data line (I/O). |
| 5 | V_PAD | power_in | 3.0V IO power domain. |
| 6 | UTXD1 | output | UART transmit pin, sending data from the module to the user device at 3.0V level. |
| 7 | URXD1 | input | UART receive pin, receiving data from the user device into the module at 3.0V level. |
| 8 | VBUS | power_in | USB power supply pin. |
| 9 | WORK | output | Module working indicator that toggles between high and low every 1 second (blinking) after normal startup. |
| 10 | POWER KEY | input | Module power on/off control, where a low level powers the module off. |
| 11 | GND | power_in | Module power supply negative (ground). |
| 12 | GND | power_in | Module power supply negative (ground). |
| 13 | DCIN | power_in | Module power supply positive, 5-16V. |
| 14 | DCIN | power_in | Module power supply positive, 5-16V. |
| 15 | NET | output | Network status indicator pin. |
| 16 | VCAP | power_in | Alternative supply input to DCIN (use one or the other, never both at once), supply voltage 3.4-4.2V with 3.8V recommended. |
| 17 | NC | unconnected | No connection. |
| 18 | RELOAD | input | Restore-factory-settings pin, effective when pulled low for 3s to 15s. |
| 19 | RESET | input | Module restart/reset input, active low. |
| 20 | VSIM | power_out | SIM card power supply pin. |
| 21 | SIM_DAT | bidirectional | SIM data line (I/O). |
| 22 | SIM_CLK | bidirectional | SIM clock line (I/O). |
| 23 | SIM_RST | output | SIM reset/control output. |
| 24 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | USR IOT |
| Package | DIP-24 |
| Category | IoT/Communication Modules |
| Pins | 24 |

## CAD (KiCad official)

- Symbol: `WH-LTE-7S1`
- Footprint: `Package_DIP:DIP-24_W7.62mm`
- 3D model: DIP-24 (KiCad packages3D, STEP)
- 3D model files: `wh-lte-7s1-etched.step` / `wh-lte-7s1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wh-lte-7s1.step` / `wh-lte-7s1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [USR IOT datasheet](docs/wh-lte-7s1-datasheet.pdf) (41 pp, sha256 `03a54aeaaf005ae8`, retrieved 2026-11-02, 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-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/wh-lte-7s1-datasheet.pdf)