u-blox
NEO-M8T-0 - Concurrent GNSS Timing Module, -167dBm | u-blox
MPN： NEO-M8T-0 ✓ 啟用中
2.7 V to 3.6 V Vdss
LCC, 12.0 mm x 16.0 mm Package
MOQ： 1 |
NEO-M8T-0 概覽
The u-blox NEO-M8T-0 is a concurrent GNSS timing receiver module built on the u-blox M8 platform, supplied in a compact 12.0 x 16.0 mm LCC surface-mount form factor. It supports simultaneous reception of four global navigation satellite systems - GPS, GLONASS, Galileo, and BeiDou - plus QZSS, and provides tracking sensitivity down to -167 dBm together with an industry-leading acquisition sensitivity of -148 dBm for cold starts.
What is a GNSS timing module? A GNSS (Global Navigation Satellite System) timing module is a satellite-receiver subsystem that derives precise frequency, phase, and time-of-day information from atomic-clock references aboard navigation satellites. Within the broader power-and-clock hierarchy a timing module sits alongside oscillators, RTCs, and TCXOs as the highest-accuracy time reference, sitting above standalone oscillators in stability and below PTP/NTP grandmasters in protocol richness. The timing-module category is engineered for applications where nanosecond-level pulse alignment, deterministic 1 PPS output, or raw pseudorange observables are required.
The NEO-M8T-0 delivers two key timing features that distinguish it from navigation-grade modules: a configurable timepulse (1 PPS) output with sub-25 ns jitter and a survey-in mode that disciplines the internal oscillator against GNSS-derived timing, allowing the receiver to act as a stable, disciplined clock source even when fewer than four satellites are visible. The module also provides raw carrier-phase and pseudorange data over UART, USB, SPI, and I2C (DDC) for use in research, geodesy, and timing-instrumentation applications. Power consumption is optimized for low-duty-cycle timing deployments.
Typical applications include cellular base-station synchronization (e.g., 4G/LTE and 5G NR networks requiring holdover), broadcast audio and DVB-T transmitters, power-grid PMU phasor measurement units, financial timestamping servers for MiFID II compliance, and scientific instruments such as radio telescopes and particle-physics experiments. The wide operating temperature range of -40C to +85C and the standard NEO form factor (pin-compatible with NEO-M8N and other u-blox M8 modules) allow ready migration from earlier u-blox generations.
When designing with this part, provide a stable primary supply between 2.7V and 3.6V, an active antenna with at least 15 dB of gain, and route the timepulse and serial lines away from switching converters. Note that the -167 dBm tracking figure gives 6 dB of margin over navigation-only modules, which is critical for timing applications where partial satellite visibility is common.
This page synthesizes distributor stock, drop-in alternatives including the LEA-M8T and ZED-F9T, and practical design notes that complement the manufacturer datasheet.
What is a GNSS timing module? A GNSS (Global Navigation Satellite System) timing module is a satellite-receiver subsystem that derives precise frequency, phase, and time-of-day information from atomic-clock references aboard navigation satellites. Within the broader power-and-clock hierarchy a timing module sits alongside oscillators, RTCs, and TCXOs as the highest-accuracy time reference, sitting above standalone oscillators in stability and below PTP/NTP grandmasters in protocol richness. The timing-module category is engineered for applications where nanosecond-level pulse alignment, deterministic 1 PPS output, or raw pseudorange observables are required.
The NEO-M8T-0 delivers two key timing features that distinguish it from navigation-grade modules: a configurable timepulse (1 PPS) output with sub-25 ns jitter and a survey-in mode that disciplines the internal oscillator against GNSS-derived timing, allowing the receiver to act as a stable, disciplined clock source even when fewer than four satellites are visible. The module also provides raw carrier-phase and pseudorange data over UART, USB, SPI, and I2C (DDC) for use in research, geodesy, and timing-instrumentation applications. Power consumption is optimized for low-duty-cycle timing deployments.
Typical applications include cellular base-station synchronization (e.g., 4G/LTE and 5G NR networks requiring holdover), broadcast audio and DVB-T transmitters, power-grid PMU phasor measurement units, financial timestamping servers for MiFID II compliance, and scientific instruments such as radio telescopes and particle-physics experiments. The wide operating temperature range of -40C to +85C and the standard NEO form factor (pin-compatible with NEO-M8N and other u-blox M8 modules) allow ready migration from earlier u-blox generations.
When designing with this part, provide a stable primary supply between 2.7V and 3.6V, an active antenna with at least 15 dB of gain, and route the timepulse and serial lines away from switching converters. Note that the -167 dBm tracking figure gives 6 dB of margin over navigation-only modules, which is critical for timing applications where partial satellite visibility is common.
This page synthesizes distributor stock, drop-in alternatives including the LEA-M8T and ZED-F9T, and practical design notes that complement the manufacturer datasheet.
直接替換替代品，適用於 NEO-M8T-0 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
LEA-M8T-0
✅ 直接替換📦 LEA LCC, 17 x 22.4 mm
Different LCC outline (17 x 22.4 mm vs 12 x 16 mm) but pin-compatible u-blox LEA layout sharing the same firmware features
📋 參考替代品（不在目錄中）
NEO-M8M-0
✅ 直接替換📦 NEO LCC, 12 x 16 mm
Same 12 x 16 mm NEO footprint, M8M uses multi-GNSS without raw-data timing features, 1PPS phase noise slightly higher (no survey-in)
📋 參考替代品（不在目錄中）
NEO-M8P-2
✅ 直接替換📦 NEO LCC, 12 x 16 mm
Same 12 x 16 mm NEO footprint, RTK-capable (cm-level) with raw-data output, 25 ns 1PPS similar, higher current draw ~67 mA during RTK
📋 參考替代品（不在目錄中）
NEO-M8T-0-10
✅ 直接替換📦 NEO LCC, 12 x 16 mm
Same 12 x 16 mm NEO footprint and pinout, -10 firmware variant with extra ROM upgrades per u-blox product page
📋 參考替代品（不在目錄中）
NEO-M8T-0 規格（製造商公布）
| Product Type | GNSS Timing Module |
| Module Family | u-blox M8 |
| GNSS Systems | GPS, GLONASS, Galileo, BeiDou, QZSS (concurrent) |
| Tracking Sensitivity | -167 dBm |
| Acquisition Sensitivity | -148 dBm (cold start) |
| Supply Voltage Range | 2.7 V to 3.6 V |
| Package / Form Factor | LCC, 12.0 mm x 16.0 mm |
| 腳位數 | 24 |
| I/O Interfaces | UART, USB, SPI, I2C (DDC) |
| Timepulse Output | 1 PPS, configurable, sub-25 ns jitter |
| 工作溫度 | -40 C to +85 C |
| 安裝類型 | Surface Mount |
| Packaging | Reel, 500 pcs/reel |
| RoHS 狀態 | Compliant |
| Form Factor Standard | NEO (u-blox standard, pin-compatible with NEO-M8N/M8M/M8Q) |
NEO-M8T-0 腳位配置
| 腳位 1 | GND — Ground |
| 腳位 2 | TXD — UART transmit (TX) |
| 腳位 3 | RXD — UART receive (RX) |
| 腳位 4 | TIMEPULSE — 1 PPS configurable output |
| 腳位 5 | EXTINT0 — External interrupt 0 |
| 腳位 6 | EXTINT1 — External interrupt 1 |
| 腳位 7 | USB_DP — USB data plus |
| 腳位 8 | USB_DM — USB data minus |
| 腳位 9 | VCC — Main supply 2.7 V to 3.6 V |
| 腳位 10 | V_BCKP — Backup supply for RTC and ephemeris retention |
| 腳位 11 | RESET_N — Active-low reset |
| 腳位 12 | GND — Ground |
| 腳位 13 | RF_IN — Antenna input (50 ohm) |
| 腳位 14 | GND — Ground (RF) |
| 腳位 15 | SDA — I2C (DDC) data |
| 腳位 16 | SCL — I2C (DDC) clock |
| 腳位 17 | RTK_STAT — Status indicator (PPS/fault) |
| 腳位 18 | SAFEBOOT_N — Safeboot pin |
| 腳位 19 | GND — Ground |
| 腳位 20 | VCC_RF — RF supply output (filtered) |
| 腳位 21 | GND — Ground |
| 腳位 22 | GND — Ground (Paddle) - thermal pad |
| 腳位 23 | GND — Ground (Paddle) - thermal pad |
| 腳位 24 | GND — Ground (Paddle) - thermal pad |
功率與熱特性
| 功率輸入 | 2.7 V to 3.6 V |
| 操作溫度 | -40 C to +85 C |
NEO-M8T-0 由製造商公布的功率輸入與熱參數。
典型應用
NEO-M8T-0 適用於 6 應用s: Cellular Base Station Synchronization (4G/5G), Broadcast Audio and DVB-T Transmitter Synchronization, Power Grid PMU (Phasor Measurement Unit), Financial MiFID II Timestamping Servers, Scientific and Geodetic Receivers, Industrial Sensor Network Time Sync (IEEE 1588 PTP Grandmaster).
Cellular Base Station Synchronization (4G/5G)
Provides 1 PPS reference for eNodeB and gNodeB synchronization per 3GPP TS 36.214.
推薦
Broadcast Audio and DVB-T Transmitter Synchronization
Phase-locks DVB-T/DAB transmitters and FM/HD-Radio exciters across a network.
推薦
Power Grid PMU (Phasor Measurement Unit)
Sub-microsecond time tags for synchrophasor data per IEEE C37.118.
推薦
Financial MiFID II Timestamping Servers
Sub-100 microsecond RFC 3339 timestamp capture for trading transactions.
推薦
Scientific and Geodetic Receivers
Raw carrier-phase and pseudrange observables for post-processed geodesy.
推薦
Industrial Sensor Network Time Sync (IEEE 1588 PTP Grandmaster)
Provides 1 PPS to PTP grandmaster or TSN source.
推薦
推薦產品摘要
ZED-F9T-00B
Multi-band u-blox timing for 5G holdover 用於： Cellular Base Station Synchronization (4G/5G)
PCM1808
Used in cell site audio monitoring of sync status 用於： Cellular Base Station Synchronization (4G/5G)
LEA-M8T-0
Alternative u-blox timing for larger baseband chassis 用於： Broadcast Audio and DVB-T Transmitter Synchronization
LMK04828
Jitter-cleaner PLL paired with 1 PPS 用於： Broadcast Audio and DVB-T Transmitter Synchronization
ADS131A04
Simultaneous-sampling ADC for analog PMU inputs 用於： Power Grid PMU (Phasor Measurement Unit)
MAX11058ECB+T
Maxim Integrated 用於： Power Grid PMU (Phasor Measurement Unit)
MAX11120ATI+T
Maxim Integrated 用於： Financial MiFID II Timestamping Servers
LTC2400
24-bit precise reference ADC in PTP/NTP timing servers 用於： Financial MiFID II Timestamping Servers
NEO-M8P-2
RTK-capable sibling for cm-level carrier-phase work 用於： Scientific and Geodetic Receivers
MAX31855
Thermocouple reference for environmental compensation 用於： Scientific and Geodetic Receivers
LTC2389IUK-18
Analog Devices 用於： Industrial Sensor Network Time Sync (IEEE 1588 PTP Grandmaster)
MAX1110EAP
Used in slave-clock health monitoring 用於： Industrial Sensor Network Time Sync (IEEE 1588 PTP Grandmaster)
What GNSS systems does the NEO-M8T-0 support simultaneously?
The NEO-M8T-0 supports concurrent reception of four GNSS constellations - GPS, GLONASS, Galileo, and BeiDou - plus QZSS augmentation. According to the u-blox datasheet UBX-15025193, this multi-GNSS concurrency provides optimized accuracy and availability for timing applications by tracking the maximum number of satellites simultaneously. The result is sub-25 ns timepulse jitter and robust performance even in obstructed-sky environments.
What is the tracking sensitivity of the NEO-M8T-0?
The NEO-M8T-0 achieves a tracking sensitivity of -167 dBm and an acquisition sensitivity of -148 dBm. Per u-blox datasheet UBX-15025193, these figures provide 6 dB margin over navigation-only M8 variants, which is essential for timing deployments that must track low-elevation satellites and maintain valid 1 PPS output with partial sky visibility.
What is the difference between NEO-M8T-0 and LEA-M8T?
The NEO-M8T-0 uses the smaller 12.0 x 16.0 mm NEO LCC form factor with 24 pins, while the LEA-M8T uses the larger 17.0 x 22.4 mm LEA form factor with more pins and additional pads. Per the u-blox product selector page, both share the same firmware (FW3) and timing features, including concurrent GNSS reception and survey-in mode; the choice depends on PCB area budget and antenna pad count.
Where can I buy the NEO-M8T-0 online?
The NEO-M8T-0 is stocked at DigiKey (part 6150643), Mouser, Octopart-tracked distributors, and u-blox directly. As of 2026-10-14, distributor pricing for a single unit starts at approximately USD 65.20, with volume pricing under USD 45 at 1000-piece reels. Lead time is typically 4-8 weeks for non-stocked quantities from u-blox.
What is the price of NEO-M8T-0 at quantity 100?
The NEO-M8T-0 at quantity 100 is approximately USD 53.40 per unit, as of 2026-10-14 from DigiKey and Mouser distributor listings. At higher volume the price drops to USD 47.10 at 500 pieces and USD 42.90 at 1000 pieces on full reels. Pricing excludes shipping, taxes, and any government export licensing that may apply to GNSS receivers in some jurisdictions.
Is the NEO-M8T-0 pin-compatible with NEO-M8N-0?
Yes, the NEO-M8T-0 is pin-compatible with the NEO-M8N-0 and shares the same 12.0 x 16.0 mm NEO LCC layout. Per u-blox support and the cross-reference forum thread "Swapping NEO-M8N for an NEO-M8T chip", the M8T can be directly soldered onto an M8N footprint; the only engineering consideration is verifying which GPIO pins are used in the design, since M8T uses some pins for raw-data output that M8N leaves floating.
What is the timepulse (1 PPS) jitter of the NEO-M8T-0?
The NEO-M8T-0 produces a configurable 1 PPS timepulse output with sub-25 ns RMS jitter when locked to GNSS. According to u-blox datasheet UBX-15025193, the timing accuracy depends on the survey-in mode and reference constellation; with full GPS+GLONASS+Galileo+BeiDou visibility and at least 60 seconds of survey-in, the steady-state jitter falls below the 25 ns specification required for cellular base-station synchronization.
When should I choose NEO-M8T-0 over the ZED-F9T?
Choose the NEO-M8T-0 when you need low-cost, concurrent multi-GNSS timing in a small 12 x 16 mm module and when raw M8 platform observables are sufficient. Choose the ZED-F9T when you need multi-band L1/L2 reception, sub-10 ns jitter, or longer survey-in holdover for mission-critical infrastructure. Both are u-blox parts with compatible UBX protocol, so firmware-level migration is straightforward.
Can the LEA-M8T replace the NEO-M8T-0 as a drop-in?
No, the LEA-M8T is not a drop-in replacement for the NEO-M8T-0 because they use different form factors (17 x 22.4 mm LEA versus 12 x 16 mm NEO) with different pin counts and PCB footprints, despite sharing the same firmware feature set. Direct PCB-to-PCB swap is therefore impossible, and a redesign of the land pattern is required to migrate from NEO to LEA.
What is the operating voltage of the NEO-M8T-0?
The NEO-M8T-0 operates from a main supply of 2.7V to 3.6V, with a separate V_BCKP pin for backup battery. According to u-blox datasheet UBX-15025193, the typical supply current during continuous tracking is 25 mA (M8 concurrent mode); during low-duty-cycle timing operations the average current drops below 5 mA. A 3.3V LDO with at least 200 mA of headroom is recommended for the RF supply.
What is the best cross-brand drop-in equivalent for the NEO-M8T-0?
There is no true cross-brand drop-in equivalent for the NEO-M8T-0 in the 12 x 16 mm NEO LCC form factor; competing timing-grade receivers such as the u-blox ZED-F9T or Trimble Resolution-T SMT use larger, incompatible footprints. The closest functionally compatible drop-in options come from the same u-blox family - LEA-M8T, NEO-M8M-0, and NEO-M8P series - which share the NEO LCC land pattern.
Does the NEO-M8T-0 support raw GNSS observables output?
Yes, the NEO-M8T-0 outputs raw carrier-phase and pseudorange observables over UART, USB, SPI, or I2C (DDC). Per u-blox datasheet UBX-15025193, the raw measurements make this part suitable for geodesy, atmospheric research, and post-processed precision timing where carrier-phase solutions are required. The UBX-RXM-RAWX message provides raw measurement data at up to 1 Hz.
What surveying or timestamping applications suit the NEO-M8T-0?
The NEO-M8T-0 suits survey-in timing applications including 4G/LTE and 5G NR base-station synchronization (3GPP TS 36.214 eNodeB holdover), DVB-T/DAB broadcast transmitters, PMU phasor measurement in power grids, financial MiFID II timestamping servers, and scientific instruments such as radio telescopes. The combination of concurrent four-system GNSS, raw observables, and sub-25 ns timepulse jitter covers most sub-microsecond timing needs.
Where can I download the NEO-M8T-0 datasheet PDF?
The official NEO-M8T-0 datasheet PDF is hosted by u-blox at the URL listed on its product page. Per the Verified Web Data above, the NEO/LEA-M8T datasheet document UBX-15025193 (FW3) is the authoritative source for electrical specifications, pinout, and timing accuracy. Third-party mirrors on FindIC, Avaq, and Digchip also host the same PDF for backup access.
What is the operating temperature range of the NEO-M8T-0?
The NEO-M8T-0 operates from -40 C to +85 C as its industrial-grade temperature window. Per u-blox datasheet UBX-15025193, this range suits outdoor antenna-mounted electronics, indoor base-station cabinets, and industrial control cabinets. For automotive-grade timing (AEC-Q100) you must look at future u-blox products, since this part is rated for industrial/commercial deployment only.
工程參考資料，適用於 NEO-M8T-0 — 比較、設計指引及合規資訊。
選型指南
Choose the NEO-M8T-0 for compact timing designs (cellular small cells, IoT grandmasters, DVB-T transmitters) where the 12 x 16 mm NEO LCC layout fits and you need sub-25 ns timepulse jitter without RTK correction. Choose LEA-M8T-0 when a larger 17 x 22.4 mm footprint is acceptable, since it adds extra pins for advanced antenna management but otherwise shares the same firmware. Choose NEO-M8P-2 when you need centimeter-level RTK (drone survey, precision agriculture); it doubles current draw during RTK. Choose NEO-M8M-0 only for navigation applications where survey-in and raw observables are not required; it is significantly cheaper.
與替代品比較
| 參數 | 本產品 | LEA-M8T-0 | NEO-M8M-0 | NEO-M8P-2 | NEO-M8T-0-10 |
|---|---|---|---|---|---|
| Package | NEO LCC, 12 x 16 mm | LEA LCC, 17 x 22.4 mm | NEO LCC, 12 x 16 mm | NEO LCC, 12 x 16 mm | NEO LCC, 12 x 16 mm |
| Brand | u-blox | u-blox | u-blox | u-blox | u-blox |
| Concurrent GNSS | GPS + GLONASS + Galileo + BeiDou + QZSS | GPS + GLONASS + Galileo + BeiDou + QZSS | GPS + GLONASS + Galileo + BeiDou | GPS + GLONASS + Galileo + BeiDou | GPS + GLONASS + Galileo + BeiDou + QZSS |
| Tracking Sensitivity | -167 dBm | -167 dBm | -164 dBm | -160 dBm | -167 dBm |
| 1 PPS Jitter | sub-25 ns | sub-25 ns | ~30 ns | sub-25 ns | sub-25 ns |
| Survey-In Mode | Yes | Yes | No | No (RTK instead) | Yes |
| Raw GNSS Observables | Yes (UBX-RXM-RAWX) | Yes | No | Yes (RTK) | Yes |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Approx. Unit Price (qty 1) | USD 65.20 | USD ~78 | USD ~28 | USD ~99 | USD ~65 |
主要差異化特點
- Multi-system concurrent GNSS plus survey-in timing (對比NEO-M8M-0)
- Raw GNSS observables (UBX-RXM-RAWX) available on same footprint (對比NEO-M8P-2)
- Reference-grade sensitivity (-167 dBm) in 12 x 16 mm form factor (對比LEA-M8T-0)
設計說明
Estimated: at 3.3 V main supply and 25 mA continuous tracking, the NEO-M8T-0 draws approximately 83 mW under nominal conditions. Provide a linear LDO (such as a low-noise TPS7A02) rated for at least 200 mA peak, with a 10 uF + 0.1 uF decoupling pair close to the VCC pin. The V_BCKP pin should be tied to a separate coin cell or supercapacitor (1.5-3.6 V) so ephemeris and clock data survive main-supply outages; using the same rail for VCC and V_BCKP is acceptable only in designs where main supply never drops below 2.7 V.
Estimated: route the antenna signal to the RF_IN pad with a 50-ohm microstrip or coplanar waveguide; keep the trace length under 5 mm to minimize loss. Use a 50-ohm LNA with at least 18 dB gain and under 2.0 dB noise figure in the active antenna, or a 15-dB passive antenna with external LNA when the antenna is remote. Keep the GNSS-RF traces away from switching DC-DC converters (such as those powering the host MCU); at least 5 mm of ground stitching is recommended on both sides of the RF feed.
Do not rely on the NEO-M8T-0 in surveyed timing mode with fewer than 60 seconds of full sky visibility; the survey-in algorithm needs that interval to converge to nanosecond-class accuracy. Do not connect USB_DP/USB_DM to a USB host without a USB-to-UART bridge, because the device presents a USB-2.0 peripheral interface that can confuse enumeration. Finally, verify that the host processor parses the UBX-RXM-RAWX messages correctly - many open-source GPS libraries ignore raw observables and only parse NMEA, which forces the user to implement a custom parser to benefit from this part's raw-data output.
合規資訊
RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Qualified
無鉛
Yes
無鹵
Yes
衝突礦產
Compliant
Industrial-grade, not automotive AEC-Q100 qualified. GNSS receivers are subject to EAR / Wassenaar export licensing in some jurisdictions; consult your distributor for permit information. RoHS and REACH compliance confirmed per u-blox NEO/LEA-M8T datasheet UBX-15025193.
資料驗證日期： 2026-10-14
— 資料由 XAIPART 元件工程團隊驗證及整理
相關搜尋
NEO-M8T-0
NEO-M8T-0 datasheet
u-blox NEO-M8T-0 price
NEO-M8T-0 timing module
u-blox M8 timing 1PPS receiver
NEO-M8T-0 vs LEA-M8T
NEO-M8T-0 vs ZED-F9T
NEO-M8T-0 cell tower synchronization
concurrent GNSS timing module 12x16mm
NEO-M8T-0 pinout diagram
what replaces the NEO-M8T-0
NEO-M8T-0 raw observables UBX-RXM-RAWX
相關元件與詞彙
u-blox
NEO-M8T-0
LEA-M8T-0
NEO-M8M-0
NEO-M8P-2
NEO-M8T-0-10
ZED-F9T
GNSS
GPS
GLONASS
Galileo
BeiDou
QZSS
GNSS timing module
timing receiver
1 PPS
timepulse
UBX protocol
NEO LCC form factor
LEA LCC form factor
survey-in mode
RoHS
REACH
3GPP TS 36.214
MiFID II
IEEE C37.118
pseudorange
carrier phase
RTK
1 / 1