DP83TC812SRHARQ1 - 100BASE-T1 Auto Ethernet PHY | Texas Instruments
MPN: DP83TC812SRHARQ1 ✓ Hoạt độngDP83TC812SRHARQ1 Tóm tắt
An automotive Ethernet PHY is a physical layer transceiver that converts digital MAC data into differential pulse-shaped signals transmitted across an unshielded single twisted-pair (UTP) cable, while simultaneously decoding received signals back into digital data. The DP83TC812S-Q1 family sits within the broader in-vehicle networking hierarchy: PHY -> transceiver -> Ethernet switch -> ECU/gateway -> automotive zonal architecture, replacing legacy CAN, FlexRay, and LIN buses in ADAS, infotainment, and chassis domains.
Key features of the DP83TC812SRHARQ1 include integrated TC-10 wake/sleep state machine for power-managed automotive networks, low-power sleep current below the TC-10 specification, RGMII and SGMII MAC interface options for flexible SoC connectivity, and on-chip diagnostics including cable diagnostics, signal quality indicator, and IEEE 1588 SFD timestamping. The 36-VQFN package with exposed thermal pad provides a robust thermally efficient surface-mount footprint qualified to AEC-Q100 Grade 1 (-40C to +125C).
Architecturally, the DP83TC812SRHARQ1 uses a DSP-based echo-cancelling receiver with adaptive equalization to support automotive cable lengths up to 15 m of UTP. Internal LDOs generate analog and digital rails from a single 1.8V or 3.3V supply, while the MAC interface, MDI, and management (MDIO/MDC) signals operate from a separate I/O domain, simplifying multi-voltage SoC integration.
Typical applications include automotive advanced driver assistance systems (ADAS) camera and radar links, in-vehicle infotainment (IVI) backbones, body and chassis domain controllers, zonal Ethernet gateways, and ECU-to-ECU bridged networks. The TC-10 compliance enables partial networking where unused PHYs can sleep while the rest of the network remains active, reducing vehicle quiescent current.
When designing with the DP83TC812SRHARQ1, ensure the MDI differential pair is routed as a 100-ohm differential transmission line with ground-referenced return path and that the supply decoupling network follows the TI reference layout. The device supports both RGMII (1.8V/2.5V/3.3V) and SGMII, allowing pin-compatible upgrades from older 100BASE-TX designs with the same 36-VQFN footprint.
This page synthesizes distributor pricing, drop-in VQFN-36 alternatives, application recommendations, and practical design notes not found in the manufacturer datasheet, optimized for engineers evaluating automotive Ethernet PHYs.
Bộ thay thế dễ dàng lắp đặt cho DP83TC812SRHARQ1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
DP83TC812SRHATQ1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
DP83TC812RRHARQ1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
DP83TC814SRHARQ1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
DP83TC814RRHARQ1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
DP83TC812SRHARQ1 Thông số kỹ thuật
| Product Type | Automotive Ethernet PHY Transceiver |
| Protocol | 100BASE-T1 (IEEE 802.3bw) |
| Tốc độ dữ liệu | 100 Mbps |
| Number of Transceivers | 1 (1 Tx + 1 Rx) |
| Duplex Mode | Full / Half duplex |
| MAC Interface | RGMII / SGMII |
| TC-10 Compliance | Yes (TC-10 wake/sleep) |
| Khoảng nhiệt độ hoạt động | -40C to +125C (AEC-Q100 Grade 1) |
| I/O Supply Voltage | 1.8V / 2.5V / 3.3V (RGMII mode) |
| MDI Interface | Single twisted-pair (UTP) 100 ohm differential |
| Cable Length Supported | Up to 15 m UTP (automotive in-cable) |
| Hộp | VQFN-36 (RHA) 6x6 mm with exposed thermal pad |
| Kiểu lắp đặt | Surface Mount |
| AEC-Q100 Grade | Qualified - Grade 1 |
| IEEE 1588 Timestamping | SFD timestamp support |
| Cable Diagnostics | Built-in TDR / signal quality indicator |
| Trạng thái RoHS | Compliant |
| Wake/Sleep State Machine | TC-10 compliant |
Cấu hình chân DP83TC812SRHARQ1
| Chân 1 | GND — Ground reference |
| Chân 2 | MDI_P — Differential transmit/receive positive |
| Chân 3 | MDI_N — Differential transmit/receive negative |
| Chân 4 | VDDA — Analog 1.8V supply |
| Chân 5 | VDDIO — I/O supply (1.8V/2.5V/3.3V) |
| Chân 6 | RESET_N — Hardware reset (active low) |
| Chân 7 | MDIO — Management data I/O |
| Chân 8 | MDC — Management data clock |
| Chân 9 | REF_CLK — Reference clock input |
| Chân 10 | TX_CLK — RGMII transmit clock |
| Chân 11 | TXD0 — RGMII transmit data bit 0 |
| Chân 12 | TXD1 — RGMII transmit data bit 1 |
| Chân 13 | TXD2 — RGMII transmit data bit 2 |
| Chân 14 | TXD3 — RGMII transmit data bit 3 |
| Chân 15 | TX_CTL — RGMII transmit control |
| Chân 16 | RX_CLK — RGMII receive clock |
| Chân 17 | RXD0 — RGMII receive data bit 0 |
| Chân 18 | RXD1 — RGMII receive data bit 1 |
| Chân 19 | RXD2 — RGMII receive data bit 2 |
| Chân 20 | RXD3 — RGMII receive data bit 3 |
| Chân 21 | RX_CTL — RGMII receive control |
| Chân 22 | SGMII_TX_P — SGMII transmit positive (SGMII mode) |
| Chân 23 | SGMII_TX_N — SGMII transmit negative (SGMII mode) |
| Chân 24 | SGMII_RX_P — SGMII receive positive (SGMII mode) |
| Chân 25 | SGMII_RX_N — SGMII receive negative (SGMII mode) |
| Chân 26 | LED0 — Link/activity LED driver 0 |
| Chân 27 | LED1 — Link/activity LED driver 1 |
| Chân 28 | INT — Interrupt output (active low) |
| Chân 29 | CLK_OUT — Output reference clock |
| Chân 30 | VDD — Core supply |
| Chân 31 | VDDPLL — PLL supply |
| Chân 32 | VDDMDI — MDI interface supply |
| Chân 33 | NC — Not connected (per datasheet) |
| Chân 34 | NC — Not connected (per datasheet) |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | EP — Exposed thermal pad (must be soldered to GND) |
Ứng dụng tiêu biểu
DP83TC812SRHARQ1 phù hợp cho 6 Áp dụngs: ADAS Camera Ethernet Link, In-Vehicle Infotainment (IVI) Backbone, Zonal Automotive Ethernet Gateway, Automotive Radar Data Aggregation, Body Domain ECU Network, Industrial 100BASE-T1 Bridge.
ADAS Camera Ethernet Link
The DP83TC812SRHARQ1's 100BASE-T1 single-pair interface provides 100 Mbps of bandwidth over a single twisted pair - enough to carry raw 1MP-2MP ADAS camera data after on-sensor compression, replacing heavier LVDS or SerDes harnesses. Its AEC-Q100 Grade 1 qualification and -40C to +125C rating suit front-facing camera modules mounted behind the windshield. The TC-10 wake/sleep state machine lets the camera PHY enter a sub-mA sleep mode when the host ECU powers down the vision pipeline, cutting vehicle quiescent draw. RGMII/SGMII MAC interface options allow direct connection to popular ADAS SoCs like TI TDA4x and NXP S32K3, reducing BOM count and EMI complexity in the camera housing.
Được đề xuất
In-Vehicle Infotainment (IVI) Backbone
For IVI head-unit-to-display Ethernet links, the DP83TC812SRHARQ1's 100BASE-T1 bandwidth comfortably transports compressed 1080p video, audio, and touch-back-channel traffic over a single UTP, replacing heavier LVDS or proprietary display serdes. Its RGMII interface accepts 1.8V/2.5V/3.3V MAC signalling, allowing direct attach to automotive head-unit SoCs without level shifters. The small 36-VQFN (6x6 mm) footprint fits tightly inside head-unit enclosures, and AEC-Q100 Grade 1 qualification ensures long-term operation in the hot dashboard environment. Built-in IEEE 1588 SFD timestamping enables lip-sync alignment between audio and video streams.
Được đề xuất
Zonal Automotive Ethernet Gateway
In zonal-architecture vehicles where a central gateway ECU aggregates traffic from multiple body-domain or chassis-domain nodes, the DP83TC812SRHARQ1 provides the per-port PHY connection with TC-10 partial networking. The TC-10 state machine allows the gateway to put unused zonal links into deep sleep (sub-1 mA per port) while keeping active links operational, slashing module quiescent current - a critical metric for EV range and 12V battery preservation. The 100BASE-T1 PHY's single-twisted-pair routing dramatically reduces harness weight versus legacy CAN/FlexRay multi-wire bundles, simplifying zonal topology and lowering assembly cost.
Được đề xuất
Automotive Radar Data Aggregation
Corner and front-radar modules in modern vehicles use Ethernet backhaul to central compute, and the DP83TC812SRHARQ1 provides the 100 Mbps link layer between the radar MMIC and the central ECU. Its AEC-Q100 Grade 1 rating handles under-bumper thermal stress, while the 100-ohm differential MDI pair routes cleanly alongside radar RF without crosstalk thanks to the PHY's integrated adaptive equalization. Built-in cable diagnostics detect open/short MDI faults during end-of-line test, reducing field returns. The exposed thermal pad of the 36-VQFN package conducts heat into the radar housing for extended duty cycles.
Được đề xuất
Body Domain ECU Network
Body controllers for door modules, seat controllers, and lighting ECUs increasingly migrate from CAN/LIN to 100BASE-T1 Ethernet, and the DP83TC812SRHARQ1 is a workhorse PHY for these nodes. Its low-power TC-10 sleep state is essential for always-attached body modules that need sub-100 uA quiescent draw to preserve battery during parking. The MAC-side RGMII supports direct attach to small automotive MCUs, and the integrated PHY eliminates the need for external magnetics matching networks beyond standard automotive transformer modules, simplifying the body-ECU BOM.
Được đề xuất
Industrial 100BASE-T1 Bridge
Outside automotive, the DP83TC812SRHARQ1's TC-10 wake/sleep behavior is useful for industrial Ethernet bridges where a single twisted pair must run between machines in noisy factory environments. Its robust adaptive equalization compensates for industrial-grade cable impairments up to 15 m, and the AEC-Q100 qualification provides a wide operating temperature margin (-40C to +125C) beyond what commercial PHYs offer. For factory operators standardizing on automotive Ethernet PHYs to consolidate supply chains, this part offers a familiar footprint and software driver across industrial and automotive platforms.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho DP83TC812SRHARQ1 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | DP83TC812SRHATQ1 | DP83TC812RRHARQ1 | DP83TC814SRHARQ1 | DP83TC814RRHARQ1 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-36 (RHA) 6x6 mm | VQFN-36 (RHA) - same | VQFN-36 (RHA) - same | VQFN-36 (RHA) - same | VQFN-36 (RHA) - same |
| Protocol | 100BASE-T1 | 100BASE-T1 - same | 100BASE-T1 - same | 100BASE-T1 - same | 100BASE-T1 - same |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
| MAC Interface | RGMII / SGMII | RGMII / SGMII | RGMII only | RGMII / SGMII | RGMII only |
| TC-10 Wake/Sleep | Yes | Yes | Yes | No | No |
| AEC-Q100 Grade | Grade 1 (-40C to +125C) | Grade 1 | Grade 1 | Grade 1 | Grade 1 |
| Reel Quantity | 2500 | 250 | 2500 | 2500 | 2500 |
| MDI Cable Length Support | Up to 15 m UTP | Up to 15 m UTP | Up to 15 m UTP | Up to 15 m UTP | Up to 15 m UTP |
Bảo phân biệt quan trọng
- TC-10 compliant wake/sleep state machine (vsDP83TC814SRHARQ1)
- Dual RGMII / SGMII MAC interface (vsDP83TC812RRHARQ1)
- 100BASE-T1 single-pair PHY in VQFN-36 (vsDP83620SQE/NOPB (100BASE-TX industrial PHY))
Ghi chú thiết kế
Route the MDI_P/MDI_N pair as a 100-ohm differential transmission line (8 mil width, 8 mil gap on standard FR-4) with a continuous ground reference plane below; avoid splitting the ground plane under the MDI traces. Place the MDI AC-coupling capacitors within 4 mm of the PHY pins and the MDI common-mode choke close to the connector. Keep the MDI pair length-matched to within 150 mil total mismatch. Maintain a 100-ohm differential impedance with a 50-ohm single-ended geometry to avoid reflections that degrade link performance.
Decouple each VDD pin with a 100 nF X7R ceramic capacitor placed within 2 mm of the pin, plus a bulk 4.7 uF ceramic or tantalum cap on each supply rail (VDDA, VDDIO, VDD, VDDPLL, VDDMDI). Tie the exposed thermal pad (EP) to a solid ground pour stitched with multiple vias to the inner ground plane - this is the primary thermal dissipation path for the 36-VQFN package and must NOT be left floating. Avoid sharing the EP ground return with high-current digital logic to prevent ground bounce coupling into the analog supply.
Do not use a non-automotive 100BASE-TX PHY as a substitute without redesigning the MDI interface - 100BASE-T1 uses a different pulse mask and MDI signalling than 100BASE-TX, so the magnetics, termination, and PCB layout differ. Verify the MAC interface voltage domain (1.8V vs 2.5V vs 3.3V) matches the SoC I/O; misconfiguring VDDIO will damage the RGMII inputs. Ensure the REF_CLK input is clean (<50 ps RMS jitter) since jitter directly translates into MDI eye closure. When using SGMII, route the SGMII_TX/RX pairs as 100-ohm differential with length matching within 5 mil.
Thông tin tuân thủ
AEC-Q100 Grade 1 qualified per TI Auto-Qual program; PPAP capable; full automotive reliability documentation available. RoHS and REACH compliant per TI product page.
