docs/references/T4000.md
Jetson T4000 — facts from DS-11945-001 v1.4
Source: jetson_thor_series_modules_datasheet_ds-11945-001v1.4.pdf Arrow.com download. pdf2md 2026-09-01. Text-based, 59 pages, OCR not needed.
This is the SOM, not the AGX developer kit. The AGX kit is a T5000 module in a 243.19 × 112.40 × 56.88 mm brick.
Identity
| T4000 | T5000 (same DS, for contrast) | |
|---|---|---|
| GPU | Blackwell, 2 GPC / 6 TPC / 1536 CUDA | 3 GPC / 10 TPC / 2560 CUDA |
| MIG example | MIG_0: 4 TPC (GPC_0), MIG_1: 2 TPC (GPC_1) | 4 TPC + (4+2) TPC |
| GPU clock | 1.53 GHz at 70 W and MAXN | 1.386 GHz @ 120 W; 1.575 GHz MAXN |
| Tensor (sparse) | 1200 FP4 / 600 FP8 TFLOPS @ 70 W | 2070 FP4 / 1035 FP8 MAXN |
| FP32 CUDA | 4.700 TFLOPS | 7.096 @ 120 W / 8.064 MAXN |
| CPU | 12× Neoverse V3AE; SPECrate 70 | 14×; SPECrate 80 |
| DRAM | 64 GB 256-bit LPDDR5X, 273 GB/s. No Alt-link ECC | 128 GB, Alt-link ECC |
| NVENC / NVDEC | 1× / 1× (GPU rail). 1.56 GHz @ 70 W, 1.69 GHz MAXN | 2× / 2× |
| ISP | 1 | 2 |
| MGBE | 3× up to 25 Gbps, 75 Gbps total | 4×, 100 Gbps total |
| CAN | none (T5000 only) | 4× |
| SYS_VIN_SV 3.3 V | none (T5000 only) | required |
| Default power mode | 70 W | 120 W |
| Max TMP before throttle | 90 W | 130 W |
| TTP max | 75 °C | 80 °C |
Tj −25 °C … 115 °C; slowdown 109 °C. Lifetime 5 years 24×7. Storage NVMe off-module.
Encode / decode (FACT, tables 2-3 and 2-5)
YUV420 8-bit, indicative.
T4000 70 W HEVC HQ: 2× 4Kp30, 1× 4Kp60. HP: 4× 4Kp30, 1× 4Kp60. UHP: 6× 4Kp30, 3× 4Kp60.
T4000 70 W HEVC decode Main/Main10: 9× 4Kp30, 4× 4Kp60, 2× 8Kp30.
Bring-up 1 body + 2 sats at 4K30 needs 3 HQ encodes. T4000 HQ cannot do that. Hybrid (Thor encodes body, sats encode on camera) is the T4000-safe path. See STREAM-BUDGET.md.
Camera I/O (ch. 2.10, 4.1, 4.2)
- MIPI CSI-2: up to 6 cameras / 16 lanes, 32 virtual channels. D-PHY 2.1 40 Gbps aggregate (2.5 Gbit/s per pair, eight pairs). C-PHY 2.1 spec 164 Gbps; qualified 2.5 Gsps — ask NVIDIA for more.
- RAW6–14, YUV422-8, RGB. Body cam path.
- CoE (Camera over Ethernet): shared Ethernet instead of point-to-point CSI. Same idea as HSB / GigE Vision.
- HSB: up to 20 cameras (overview table).
- ISP: one engine, max 1215 MHz, 3.5 GPixel/s, Bayer ≤ 24 MP, 30° CRA.
Networking (4.10.1) — do not treat QSFP as 100GbE
Each MGBE is independent at 2.5 / 5 / 10 / 25 Gbps (XFI/SFI, USXGMII, 25GAUI). MACsec to 25G.
When those lanes hit a QSFP28 cage they stay four (or three) separate controllers. They do not aggregate to 40G/100G. A 100G switch in 100G mode will not talk to the cage.
IEEE 1588v2, 802.1AS, 802.1Qbv/Qbu, TSN — usable for PTP across PoE satellites.
PHY, magnetics, RJ45 are off-module.
Power (ch. 3, table 3-1 / 6-1 / 6-2)
Carrier must supply:
| Rail | T4000 | Typical | Imax |
|---|---|---|---|
| SYS_VIN_HV | 7–20 V | 12 V | 22 A @ 20 V |
| SYS_VIN_MV | 5 V | 5 V | 6 A |
| SYS_VIN_SV | not present | — | — |
| PMIC_BBATT | 1.85–5.5 V | RTC coin | 50 µA |
Default 70 W; clocks throttle if module power exceeds 90 W.
Mechanical (6.4) — enclosure
87.0 × 100.0 × 15.29 mm, 0.350 kg ±4%. 699-pin B2B. Mounting holes “A” mate module + motherboard + thermal solution (figures 6-1…6-5 in the PDF; pdf2md does not extract drawings).
Thermal extract: THERMAL.md. First print is still the AGX kit envelope, not this 15 mm sandwich. Production body is metal; 70 W fanless handheld is not honest.
Related NVIDIA docs
- DG-12084-001 Design Guide — pinmux, MGBE PHY, CSI routing (not in tree)
- TDG-12271-001 v1.3 Thermal Design Guide — in tree
- Pinmux template