# TDA8034HN

**NXP Semicon** · Interface - Specialized · VQFN-24-EP(4x4)

TDA8034HN from NXP Semicon, in a VQFN-24-EP(4x4). 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 | VDD(INTF) | power_in | Interface supply voltage; all interface signals to the system controller are referenced to this supply. |
| 2 | VCC_SEL2 | input | 5 V or 3 V VCC selection input: active HIGH selects VCC = 5 V, and active LOW selects VCC = 3 V when VCC_SEL1 is HIGH. |
| 3 | RSTIN | input | Microcontroller card reset input, active HIGH, referenced to VDD(INTF). |
| 4 | VCC_SEL1 | input | 1.8 V VCC selection input: active LOW selects VCC = 1.8 V, and active HIGH disables the 1.8 V selection. |
| 5 | CMDVCCN | input | Microcontroller input that starts the card activation sequence, active LOW. |
| 6 | CLKDIV1 | input | Sets the card clock frequency on pin CLK together with pin CLKDIV2, per the clock configuration table (Table 4). |
| 7 | CLKDIV2 | input | Sets the card clock frequency on pin CLK together with pin CLKDIV1, per the clock configuration table (Table 4). |
| 8 | PRESN | input | Card presence contact input, active LOW (card considered present when LOW), with built-in debounce typically 8 ms. |
| 9 | I/O | bidirectional | Card input/output data line (C7), protected half-duplex buffered I/O with an internal 11 kΩ pull-up to VCC. |
| 10 | AUX1 | bidirectional | Auxiliary card input/output data line (C4), protected half-duplex buffered I/O with an internal 11 kΩ pull-up to VCC. |
| 11 | AUX2 | bidirectional | Auxiliary card input/output data line (C8), protected half-duplex buffered I/O with an internal 11 kΩ pull-up to VCC. |
| 12 | GND | power_in | Ground reference for the device. |
| 13 | CLK | output | Card clock output (C3), with frequency set by CLKDIV1 and CLKDIV2 and up to 20 MHz. |
| 14 | RST | output | Card reset output (C2), controlled non-inverted by pin RSTIN. |
| 15 | VCC | power_out | Card supply output (C1) regulated to 5 V, 3 V or 1.8 V ±5 %, to be decoupled to GND with a 470 nF capacitor close to the pin and a 220 nF capacitor near the card socket contact, with ESR below 100 m (unit symbol truncated in the extracted text). |
| 16 | VDDP | power_in | Low-dropout regulator input supply: 4.85 V to 5.5 V when VCC_SEL2 is HIGH (VCC = 5 V), and 3 V to 5.5 V when VCC_SEL2 is LOW or VCC_SEL1 is LOW. |
| 17 | VDD | power_in | Digital supply voltage in the range 2.7 V to 3.6 V. |
| 18 | PORADJ | input | Power-on reset threshold adjustment input using an optional external resistor bridge; connect to VDD(INTF) if the bridge is not required. |
| 19 | OFFN | output | NMOS interrupt output to the microcontroller, active LOW, with an internal 20 kΩ pull-up to VDD(INTF). |
| 20 | I/OUC | bidirectional | Microcontroller input/output data line, with an internal 10 kΩ pull-up to VDD(INTF). |
| 21 | AUX1UC | bidirectional | Auxiliary microcontroller input/output data line, with an internal 10 kΩ pull-up to VDD(INTF). |
| 22 | AUX2UC | bidirectional | Auxiliary microcontroller input/output data line, with an internal 10 kΩ pull-up to VDD(INTF). |
| 23 | XTAL1 | input | Crystal connection input, also usable as external clock input up to 26 MHz, referenced to VDD. |
| 24 | XTAL2 | output | Crystal connection output, referenced to VDD. |
| 25 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NXP Semicon |
| Package | VQFN-24-EP(4x4) |
| Category | Interface |
| Pins | 25 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VDDP power supply voltage (regulator input), VCC = 5 V | VDDP | 4.85 | 5 | 5.5 | V | VCC = 5 V | 15 |
| VDDP power supply voltage (regulator input), VCC = 3 V or 1.8 V | VDDP | 3 | 3.3 | 5.5 | V | VCC = 3 V or 1.8 V | 15 |
| VDD supply voltage | VDD | 2.7 | 3.3 | 3.6 | V |  | 15 |
| VDD(INTF) interface supply voltage | VDD(INTF) | 1.6 | 3.3 |  | V |  | 15 |
| Ambient temperature | Tamb | -25 |  | 85 | °C |  | 2 |
| VDDP power supply voltage pin VDDP | VDDP | -0.3 |  | 6 | V |  | 14 |
| VDD supply voltage pin VDD | VDD | -0.3 |  | 4.6 | V |  | 14 |
| VDD(INTF) interface supply voltage pin VDD(INTF) | VDD(INTF) | -0.3 |  | 4.6 | V |  | 14 |
| Input voltage pins CMDVCCN, CLKDIV1, CLKDIV2, VCC_SEL1, VCC_SEL2, RSTIN, OFFN, PORADJ, XTAL1, XTAL2, I/OUC, AUX1UC, AUX1UC | VI | -0.3 |  | 4.6 | V |  | 14 |
| Card contact pins PRESN, I/O, RST, AUX1, AUX2 and CLK |  | -0.3 |  | 6 | V |  | 14 |
| Storage temperature | Tstg | -55 |  | 150 | °C |  | 14 |
| Junction temperature | Tj |  |  | 125 | °C |  | 14 |
| Total power dissipation | Ptot |  |  | 0.25 | W | Tamb = 25 °C to +85 °C | 14 |
| ESD voltage, Human Body Model on card pins | VESD | -8 |  | 8 | kV | Human Body Model (HBM) on card pins I/O, RST, VCC, AUX1, AUX2, CLK; within typical application | 14 |
| ESD voltage, Human Body Model on all other pins | VESD | -2 |  | 2 | kV | Human Body Model (HBM); all other pins | 14 |
| Thermal resistance from junction to ambient (HVQFN24) | Rth(j-a) |  | 53 |  | K/W | in free air | 15 |
| IDD supply current, shutdown mode | IDD |  |  | 35 | µA | shutdown mode | 15 |
| IDD supply current, deep shutdown mode | IDD |  |  | 12 | µA | deep shutdown mode | 15 |
| IDD supply current, active mode | IDD |  |  | 2 | mA | active mode | 15 |
| IDDP power supply current, shutdown mode | IDDP |  |  | 5 | µA | shutdown mode; fxtal stopped | 15 |
| IDDP power supply current, active mode | IDDP |  |  | 1.5 | mA | active mode; fCLK = 1/2 fxtal; no load | 15 |
| IDDP power supply current, active mode with card load | IDDP |  |  | 70 | mA | active mode; fCLK = 1/2 fxtal; ICC = 65 mA | 15 |
| IDD(INTF) interface supply current, shutdown mode | IDD(INTF) |  |  | 6 | µA | shutdown mode | 15 |
| IDD(INTF) interface supply current, active mode | IDD(INTF) |  |  | 2 | mA | active mode | 15 |
| Threshold voltage, pin VDD falling | Vth | 2.3 | 2.4 | 2.5 | V | no external resistors on pin PORADJ; pin VDD falling | 15 |
| Threshold voltage, pin VDDP falling | Vth | 3 | 4.1 | 4.4 | V | no external resistors on pin PORADJ; pin VDDP falling; VCC = 5 V | 15 |
| Threshold voltage with external resistors on PORADJ | Vth | 1.2 | 1.24 | 1.29 | V | external resistors on pin PORADJ | 15 |
| Hysteresis voltage, pin VDD | Vhys | 50 | 100 | 150 | mV | no external resistors on pin PORADJ; pin VDD | 15 |
| Hysteresis voltage, pin VDDP | Vhys | 100 | 200 | 350 | mV | no external resistors on pin PORADJ; pin VDDP; VCC = 5 V | 15 |
| Pulse width | tw | 5.1 | 8 | 10.2 | ms |  | 15 |
| Decoupling capacitance connected to VCC | Cdec | 550 |  | 830 | nF | connected to VCC | 15 |
| VCC output voltage, shutdown mode | Vo | -0.1 |  | 0.1 | V | shutdown mode; no load | 16 |
| VCC supply voltage, 5 V card | VCC | 4.75 | 5 | 5.25 | V | active mode; ICC < 65 mA DC | 16 |
| VCC supply voltage, 3 V card | VCC | 2.85 | 3.05 | 3.15 | V | active mode; ICC < 65 mA DC | 16 |
| VCC supply voltage, 1.8 V card | VCC | 1.71 | 1.83 | 1.89 | V | active mode; ICC < 35 mA DC | 16 |
| VCC supply voltage with current pulses, 5 V card | VCC | 4.65 | 5 | 5.25 | V | active mode; current pulses of 40 nA/s at ICC < 200 mA; t < 400 ns | 16 |
| VCC supply voltage with current pulses, 3 V card | VCC | 2.76 |  | 3.2 | V | active mode; current pulses of 40 nA/s at ICC < 200 mA; t < 400 ns | 16 |
| VCC supply voltage with current pulses, 1.8 V card | VCC | 1.66 |  | 1.94 | V | active mode; current pulses of 15 nA/s at ICC < 200 mA, t < 400 ns | 16 |
| Peak-to-peak ripple voltage | Vripple(p-p) |  |  | 350 | mV | 20 kHz to 200 MHz | 16 |
| VCC supply current | ICC |  |  | 65 | mA | VCC = 0 V to 5 V, 3 V or 1.8 V | 16 |
| Slew rate, 5 V card | SR | 0.055 | 0.18 | 0.3 | V/µs | 5 V card | 16 |
| Slew rate, 3 V card | SR | 0.04 | 0.18 | 0.3 | V/µs | 3 V card | 16 |
| Slew rate, 1.8 V card | SR | 0.025 | 0.18 | 0.3 | V/µs | 1.8 V card | 16 |
| Crystal frequency | fxtal | 2 |  | 26 | MHz | card clock reference; crystal oscillator | 16 |
| Output current limit, pin I/O | IOlim | -15 |  | 15 | mA | pin I/O | 20 |
| Output current limit, pin VCC | IOlim | 135 | 175 | 225 | mA | pin VCC | 20 |
| Output current limit, pin CLK | IOlim | -70 |  | 70 | mA | pin CLK | 20 |
| Output current limit, pin RST | IOlim | -20 |  | 20 | mA | pin RST | 20 |
| Shutdown current, pin VCC | Isd | 90 | 120 | 150 | mA | pin VCC | 20 |
| Activation time | tact | 2090 |  | 4160 | µs | see Figure 7 on page 11 | 20 |
| Deactivation time | tdeact | 35 | 90 | 250 | µs | see Figure 8 on page 12 | 20 |
| Delay time CLK sent to card, td(start) = t3 | td(start) | 2090 |  | 4112 | µs | CLK sent to card using an external clock | 21 |
| Delay time CLK sent to card, td(end) = t5 | td(end) | 2120 |  | 4160 | µs | CLK sent to card using an external clock | 21 |
| Debounce time, pin PRESN | tdeb | 3.2 | 4.5 | 6.4 | ms | pin PRESN | 21 |
| Internal oscillator frequency, shutdown mode | fosc(int) | 100 | 150 | 200 | kHz | Shutdown mode | 18 |
| Internal oscillator frequency, active state | fosc(int) | 2 | 2.7 | 3.2 | MHz | active state | 18 |
| Frequency on pin CLK | fCLK | 0 |  | 20 | MHz | operational | 19 |
| Duty cycle on pin CLK | δ | 45 |  | 55 | % | CL = 30 pF | 19 |
| Pull-up resistance on data lines, connected to VCC | Rpu | 7 | 9 | 11 | kΩ | connected to VCC | 17 |

## CAD (KiCad official)

- Symbol: `TDA8034HN`
- Footprint: `Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm`
- 3D model: VQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files: `tda8034hn-etched.step` / `tda8034hn-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tda8034hn.step` / `tda8034hn.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [NXP Semicon datasheet](https://www.nxp.com/docs/en/data-sheet/TDA8034HN.pdf) (32 pp, sha256 `9170afcb1af97e4b`, retrieved 2026-10-18, 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/tda8034hn-datasheet.pdf)