# TL852CN

**Texas Instruments** · RF Misc ICs and Modules · PDIP-16

TL852CN from Texas Instruments, in a PDIP-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 | G1IN | input | First-stage amplifier input; gain is set by a resistor from G1IN to GADJ, and a 5-kΩ resistor from G1IN to XIN is recommended to dampen transducer ringing. |
| 2 | XIN | bidirectional | Transducer connection providing clamping for the transformer secondary used for transmit drive, with input clamp of 2.5 V at 40 mA and −1.5 V at −40 mA and ±60 mA maximum input current (50% duty cycle). |
| 3 | GADJ | passive | Gain adjust node; overall amplifier gain is set with a resistor between G1IN and GADJ. |
| 4 | LC | passive | Connection for an external parallel inductor-capacitor to VCC that sets amplifier gain and Q, tuned at the operating frequency of 20 kHz to 90 kHz. |
| 5 | VCC | power_in | Supply voltage pin, recommended operating range 4.5 V to 6.8 V. |
| 6 | G1OUT | output | First-stage amplifier output, AC coupled to G2IN with a 0.01-µF capacitor for proper biasing. |
| 7 | G2IN | input | Second-stage amplifier input, AC coupled from G1OUT with a 0.01-µF capacitor. |
| 8 | BIAS | passive | Internal bias reference connection requiring an external 68-kΩ ±5% resistor to GND (64 kΩ to 72 kΩ allowed). |
| 9 | REC | output | Receive output, held low by an internal 1-µA current source and charged by a 50-µA source on received signal, with a 1000-pF capacitor to GND required. |
| 10 | NC | unconnected | No internal connection. |
| 11 | NC | unconnected | No internal connection. |
| 12 | GCC | input | TTL-compatible digital gain control input C (VIH min 2.1 V, VIL max 0.6 V) that must be driven synchronously with GCA, GCB and GCD within 0.1 µs. |
| 13 | GCB | input | TTL-compatible digital gain control input B (VIH min 2.1 V, VIL max 0.6 V) that must be driven synchronously with GCA, GCC and GCD within 0.1 µs. |
| 14 | GCA | input | TTL-compatible digital gain control input A (VIH min 2.1 V, VIL max 0.6 V) that must be driven synchronously with GCB, GCC and GCD within 0.1 µs. |
| 15 | GCD | input | TTL-compatible digital gain control input D (VIH min 2.1 V, VIL max 0.6 V) that must be driven synchronously with GCA, GCB and GCC within 0.1 µs. |
| 16 | GND | power_in | Ground reference; the BIAS resistor and REC capacitor return here. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-16 |
| Category | Radio Frequency Chip/Antenna |
| 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 | 4.5 |  | 6.8 | V |  | 3 |
| High-level input voltage, GCA, GCB, GCC, GCD | VIH | 2.1 |  |  | V |  | 3 |
| Low-level input voltage, GCA, GCB, GCC, GCD | VIL |  |  | 0.6 | V |  | 3 |
| Bias resistor between BIAS and GND |  | 64 |  | 72 | kΩ |  | 3 |
| Operating free-air temperature | TA | 0 |  | 40 | °C |  | 3 |
| Voltage at any pin with respect to GND |  | -0.5 |  | 7 | V |  | 3 |
| Voltage at any pin with respect to VCC |  | -7 |  | 0.5 | V |  | 3 |
| XIN input current |  | -60 |  | 60 | mA | 50% duty cycle | 3 |
| Continuous power dissipation |  |  |  | 1150 | mW | At or below 25°C free-air temperature (derate linearly 9.2 mW/°C above 25°C) | 3 |
| Operating free-air temperature range |  | -40 |  | 85 | °C |  | 3 |
| Storage temperature range |  | -65 |  | 150 | °C |  | 3 |
| Lead temperature |  |  |  | 260 | °C | 1,6 mm (1/16 inch) from case for 10 seconds | 3 |

## CAD (KiCad official)

- Symbol: `TL852CN`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: PDIP-16 (KiCad packages3D, STEP)
- 3D model files: `tl852cn-etched.step` / `tl852cn-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl852cn.step` / `tl852cn.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tl852) (12 pp, sha256 `d888ff4dd9b571cf`, retrieved 2026-10-31, tier: manufacturer)
- **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/tl852cn-datasheet.pdf)