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TRF7961RHBR
Public Made by Adomby adom
Texas Instruments RF Chips, VQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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TRF7961RHBR
Texas Instruments · RF Chips · VQFN-32-EP(5x5)
TRF7961RHBR from Texas Instruments, in a VQFN-32-EP(5x5). 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_A | power_out | Internal regulated supply, 2.7 V to 3.4 V, for analog circuitry. |
| 2 | VIN | power_in | External supply input to the chip, 2.7 V to 5.5 V. |
| 3 | VDD_RF | power_out | Internal regulated supply, 2.7 V to 5 V, normally connected to VDD_PA (pin 4). |
| 4 | VDD_PA | power_in | Supply for the PA; normally connected externally to VDD_RF (pin 3). |
| 5 | TX_OUT | output | RF output with selectable output power of 100 mW at 8 Ω or 200 mW at 4 Ω with VDD = 5 V. |
| 6 | VSS_RF | power_in | Negative supply for the PA; normally connected to circuit ground. |
| 7 | VSS_RX | power_in | Negative supply for the RX inputs; normally connected to circuit ground. |
| 8 | RX_IN1 | input | RX input used for AM reception. |
| 9 | RX_IN2 | input | RX input used for PM reception. |
| 10 | VSS | power_in | Chip substrate ground. |
| 11 | BAND_GAP | output | Band-gap voltage of 1.6 V, an internal analog voltage reference that must be AC-bypassed to ground. |
| 12 | ASK/OOK | bidirectional | In direct mode selects ASK or OOK modulation (0 = ASK, 1 = OOK); can also be configured to provide the received analog signal output (ANA_OUT). |
| 13 | IRQ | output | Interrupt request output to prompt the MCU for attention when a PICC or VICC response is detected. |
| 14 | MOD | input | External modulation input used in direct mode. |
| 15 | VSS_A | power_in | Negative supply for internal analog circuits; normally connected to circuit ground. |
| 16 | VDD_I/O | power_in | Supply for I/O communications, 1.8 V to 5.5 V; connect to VIN for 5-V communication, VDD_X for 3.3-V communication, or any voltage from 1.8 V to 5.5 V. |
| 17 | I/O_0 | bidirectional | I/O pin for parallel communication; unused in SPI modes where it is hardwired to VSS or VDD per the interface table. |
| 18 | I/O_1 | bidirectional | I/O pin for parallel communication; hardwired to VDD or VSS when SPI is used. |
| 19 | I/O_2 | bidirectional | I/O pin for parallel communication; hardwired to VDD when SPI is used. |
| 20 | I/O_3 | bidirectional | I/O pin for parallel communication. |
| 21 | I/O_4 | bidirectional | I/O pin for parallel communication; serves as slave select (SS) in SPI with SS. |
| 22 | I/O_5 | bidirectional | I/O pin for parallel communication; provides the strobe output clock for serial communication and the data clock output in direct mode. |
| 23 | I/O_6 | bidirectional | I/O pin for parallel communication; MISO for SPI, and serial bit data output in direct mode 1 or subcarrier signal in direct mode 0. |
| 24 | I/O_7 | bidirectional | I/O pin for parallel communication; MOSI for SPI. |
| 25 | EN2 | input | Pulse enable and selection of power-down mode; if connected to VIN, VDD_X stays active during power down to support the MCU, and it can also be used for pulse wake-up from power-down. |
| 26 | DATA_CLK | input | Clock input for MCU communication in both parallel and serial modes. |
| 27 | SYS_CLK | output | Clock for the MCU at 3.39, 6.78, or 13.56 MHz when EN = 1; if EN = 0 and EN2 = 1, the system clock is set to 60 kHz. |
| 28 | EN | input | Chip enable input; when EN = 0 the chip is in power-down mode. |
| 29 | VSS_D | power_in | Negative supply for internal digital circuits; normally connected to circuit ground. |
| 30 | OSC_OUT | output | Crystal oscillator output for the single external 13.56 MHz crystal. |
| 31 | OSC_IN | input | Crystal oscillator input for the single external 13.56 MHz crystal. |
| 32 | VDD_X | power_out | Internally regulated supply, 2.7 V to 3.4 V, for external circuitry (MCU). |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-32-EP(5x5) |
| Category | Radio Frequency Chip/Antenna |
| Pins | 33 |
CAD (KiCad official)
- Symbol:
TRF7961RHBR - Footprint:
Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm - 3D model: VQFN-32-EP(5x5) (KiCad packages3D, STEP)
- 3D model files:
trf7961rhbr-etched.step/trf7961rhbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);trf7961rhbr.step/trf7961rhbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (55 pp, sha256
34e4b915ecd05efb, retrieved 2026-10-07, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).
# TRF7961RHBR
**Texas Instruments** · RF Chips · VQFN-32-EP(5x5)
TRF7961RHBR from Texas Instruments, in a VQFN-32-EP(5x5). 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_A | power_out | Internal regulated supply, 2.7 V to 3.4 V, for analog circuitry. |
| 2 | VIN | power_in | External supply input to the chip, 2.7 V to 5.5 V. |
| 3 | VDD_RF | power_out | Internal regulated supply, 2.7 V to 5 V, normally connected to VDD_PA (pin 4). |
| 4 | VDD_PA | power_in | Supply for the PA; normally connected externally to VDD_RF (pin 3). |
| 5 | TX_OUT | output | RF output with selectable output power of 100 mW at 8 Ω or 200 mW at 4 Ω with VDD = 5 V. |
| 6 | VSS_RF | power_in | Negative supply for the PA; normally connected to circuit ground. |
| 7 | VSS_RX | power_in | Negative supply for the RX inputs; normally connected to circuit ground. |
| 8 | RX_IN1 | input | RX input used for AM reception. |
| 9 | RX_IN2 | input | RX input used for PM reception. |
| 10 | VSS | power_in | Chip substrate ground. |
| 11 | BAND_GAP | output | Band-gap voltage of 1.6 V, an internal analog voltage reference that must be AC-bypassed to ground. |
| 12 | ASK/OOK | bidirectional | In direct mode selects ASK or OOK modulation (0 = ASK, 1 = OOK); can also be configured to provide the received analog signal output (ANA_OUT). |
| 13 | IRQ | output | Interrupt request output to prompt the MCU for attention when a PICC or VICC response is detected. |
| 14 | MOD | input | External modulation input used in direct mode. |
| 15 | VSS_A | power_in | Negative supply for internal analog circuits; normally connected to circuit ground. |
| 16 | VDD_I/O | power_in | Supply for I/O communications, 1.8 V to 5.5 V; connect to VIN for 5-V communication, VDD_X for 3.3-V communication, or any voltage from 1.8 V to 5.5 V. |
| 17 | I/O_0 | bidirectional | I/O pin for parallel communication; unused in SPI modes where it is hardwired to VSS or VDD per the interface table. |
| 18 | I/O_1 | bidirectional | I/O pin for parallel communication; hardwired to VDD or VSS when SPI is used. |
| 19 | I/O_2 | bidirectional | I/O pin for parallel communication; hardwired to VDD when SPI is used. |
| 20 | I/O_3 | bidirectional | I/O pin for parallel communication. |
| 21 | I/O_4 | bidirectional | I/O pin for parallel communication; serves as slave select (SS) in SPI with SS. |
| 22 | I/O_5 | bidirectional | I/O pin for parallel communication; provides the strobe output clock for serial communication and the data clock output in direct mode. |
| 23 | I/O_6 | bidirectional | I/O pin for parallel communication; MISO for SPI, and serial bit data output in direct mode 1 or subcarrier signal in direct mode 0. |
| 24 | I/O_7 | bidirectional | I/O pin for parallel communication; MOSI for SPI. |
| 25 | EN2 | input | Pulse enable and selection of power-down mode; if connected to VIN, VDD_X stays active during power down to support the MCU, and it can also be used for pulse wake-up from power-down. |
| 26 | DATA_CLK | input | Clock input for MCU communication in both parallel and serial modes. |
| 27 | SYS_CLK | output | Clock for the MCU at 3.39, 6.78, or 13.56 MHz when EN = 1; if EN = 0 and EN2 = 1, the system clock is set to 60 kHz. |
| 28 | EN | input | Chip enable input; when EN = 0 the chip is in power-down mode. |
| 29 | VSS_D | power_in | Negative supply for internal digital circuits; normally connected to circuit ground. |
| 30 | OSC_OUT | output | Crystal oscillator output for the single external 13.56 MHz crystal. |
| 31 | OSC_IN | input | Crystal oscillator input for the single external 13.56 MHz crystal. |
| 32 | VDD_X | power_out | Internally regulated supply, 2.7 V to 3.4 V, for external circuitry (MCU). |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-32-EP(5x5) |
| Category | Radio Frequency Chip/Antenna |
| Pins | 33 |
## CAD (KiCad official)
- Symbol: `TRF7961RHBR`
- Footprint: `Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm`
- 3D model: VQFN-32-EP(5x5) (KiCad packages3D, STEP)
- 3D model files: `trf7961rhbr-etched.step` / `trf7961rhbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `trf7961rhbr.step` / `trf7961rhbr.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/trf7961) (55 pp, sha256 `34e4b915ecd05efb`, retrieved 2026-10-07, tier: lcsc)
- **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/trf7961rhbr-datasheet.pdf)