NTB0102GT,115 - 2-Bit Auto-Direction Level Translator | NXP
Teilenummer: NTB0102GT,115 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.42 | $0,42 |
| 10 | $0.36 | $3,60 |
| 100 | $0.28 | $28,00 |
| 500 | $0.22 | $110,00 |
| 1.000 | $0.18 | $180,00 |
NTB0102GT,115 Übersicht
A dual-supply translating transceiver is a logic IC that bridges two voltage domains on a PCB - for example a 1.8 V microcontroller port and a 3.3 V or 5 V peripheral. It sits within the logic IC family hierarchy under voltage level translators and bus transceivers, forming part of the broader power management and interface logic ecosystem. Unlike direction-controlled translators, auto-direction sensing devices detect data flow automatically, removing the need for a DIR control pin.
Key features include dual supply rails - VCC(A) from 1.2 V to 3.6 V and VCC(B) from 1.65 V to 5.5 V - a fast 4.8 ns propagation delay, automatic direction sensing on both I/O ports, and a shared output enable (OE) input that 3-states both ports for bus isolation. The 100 Mbps data rate comfortably covers I2C, SPI, UART, and general-purpose GPIO translation.
Architecturally, the NTB0102 uses NXP's auto-direction sensing scheme with open-drain style I/O structures and integrated 10 kohm pull-up resistors on the A-side, so the dominant driver determines direction on a per-bit basis without host intervention. This eliminates bus contention and firmware overhead in mixed-voltage systems.
Typical applications include translating SPI or I2C buses between 1.8 V MCUs and 3.3 V sensors, level-shifting UART links in battery-powered products, and interfacing 5 V legacy peripherals to low-voltage processors.
Design consideration: because auto-direction translators rely on weak pull-ups, use them with push-pull, lightly loaded buses; heavily capacitive or resistive loads reduce the effective data rate.
This page adds value beyond the datasheet with verified drop-in alternatives, distributor pricing context, FAQ answers to real engineer queries, and practical design notes.
Drop-in-Alternativen für NTB0102GT,115 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
NTB0102GT,125
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
NTS0102GT,115
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
NTB0102GT,115 Grenzwerte & elektrische Eigenschaften
| Funktion | Dual-supply translating transceiver, auto direction sensing |
| Bits | 2 |
| Supply Voltage VCC(A) | 1.2 V to 3.6 V |
| Supply Voltage VCC(B) | 1.65 V to 5.5 V |
| Maximum Supply Voltage | 3.6 V (VCC(A)) / 5.5 V (VCC(B)) |
| Datenrate | 100 Mbps |
| Propagation Delay | 4.8 ns |
| Ausgangstyp | 3-state |
| Direction Control | Automatic (auto direction sensing) |
| Output Enable | Yes (OE pin, 3-state) |
| Gehäuse | 8-XSON, SOT833-1 (1.95 x 1 mm) |
| Montageart | Surface Mount |
| Number of Terminals | 8 |
| Temperature Grade | Automotive |
| Package Suffix ,115 | Reel packing, standard temperature range per NXP ordering code |
NTB0102GT,115 Pin-Konfiguration
| Pin 1 | OE — Output enable input; low 3-states both ports |
| Pin 2 | A1 — 2-bit data port A, bit 1 (VCC(A) domain, 1.2-3.6 V) |
| Pin 3 | GND — Ground (0 V) |
| Pin 4 | B2 — 2-bit data port B, bit 2 (VCC(B) domain, 1.65-5.5 V) |
| Pin 5 | B1 — 2-bit data port B, bit 1 (VCC(B) domain, 1.65-5.5 V) |
| Pin 6 | VCC(B) — B-side supply, 1.65 V to 5.5 V |
| Pin 7 | A2 — 2-bit data port A, bit 2 (VCC(A) domain, 1.2-3.6 V) |
| Pin 8 | VCC(A) — A-side supply, 1.2 V to 3.6 V |
Typische Anwendungen
NTB0102GT,115 ist geeignet für 6 Anwendungs: SPI Bus Level Translation, I2C Level Shifting, UART Interface Bridging, GPIO Expansion in Mixed-Voltage Systems, Battery-Powered Portable Devices, Industrial Sensor Interfaces.
SPI Bus Level Translation
The NTB0102GT,115 is well suited to translating SPI buses between a 1.8 V microcontroller and 3.3 V or 5 V peripherals. Its 100 Mbps data rate covers SPI clocks well beyond 20 MHz, and the 4.8 ns propagation delay keeps timing margins safe even at the top of that range. The A-port connects to the controller domain (VCC(A) = 1.8 V) and the B-port to the peripheral domain (VCC(B) = 3.3 V), with MOSI and SCLK handled directly. For MISO, the auto-direction scheme detects the slave's drive and reverses direction automatically, eliminating a DIR pin. Designers should keep trace capacitance low; the weak internal pull-ups mean heavily loaded lines reduce the effective edge rate, so for long SPI buses or many slave devices consider a push-pull translator like the NTS0102 instead.
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I2C Level Shifting
I2C is inherently bidirectional and open-drain, which aligns naturally with the NTB0102GT,115's auto-direction sensing architecture. Each bus line (SDA, SCL) uses one A/B channel; the integrated 10 kohm pull-ups on the A-side participate in the wired-AND logic, so when the 1.8 V controller or a peripheral pulls the line low, the translator propagates the low level across domains without a control pin. VCC(A) is set to the controller voltage (1.2-3.6 V) and VCC(B) to the bus voltage (1.65-5.5 V), supporting classic 1.8 V-to-3.3 V sensor translation. Because the internal pull-ups are relatively weak, external pull-up resistors on both sides are typically needed to meet I2C rise-time specifications at 400 kHz fast mode.
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UART Interface Bridging
UART links between low-voltage MCUs and 3.3 V or 5 V modules (GPS receivers, Bluetooth modules, cellular modems) are a common use case for the NTB0102GT,115. TX and RX are separate unidirectional lines, so the auto-direction circuit simply latches each channel's direction from the active driver - no firmware configuration is required. UART data rates are far below the part's 100 Mbps capability, so signal integrity is never the limiting factor; the 4.8 ns delay is negligible against multi-microsecond bit periods. The OE pin can 3-state both channels during module power-up or reset to prevent back-powering the low-voltage domain through protection diodes. Using OE as a power-sequencing gate is a recommended practice when the two supply rails ramp at different times.
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GPIO Expansion in Mixed-Voltage Systems
When a 1.2 V, 1.8 V, or 2.5 V processor must drive or read 3.3 V/5 V board-level signals - enable pins, status flags, interrupt lines - the NTB0102GT,115 provides two general-purpose translated channels in 1.95 x 1 mm. The wide VCC(A) range down to 1.2 V is a key differentiator, supporting advanced low-voltage process nodes that many competing translators do not accept on the low side. Auto direction sensing means the same PCB assembly can use a channel as an input or an output without any logic change, which simplifies design reuse across product variants. Keep in mind the weak pull-up architecture: highly resistive loads or long stubs slow the edges, so GPIO lines with heavy fan-out should be buffered or assigned to a push-pull translator.
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Battery-Powered Portable Devices
Portable and wearables designs routinely mix a 1.8 V low-power MCU with 3.3 V flash memory, sensors, and wireless modules. The NTB0102GT,115 fits this space-constrained environment thanks to its 1.95 x 1 mm SOT833-1 leadless package and dual-supply architecture that allows both rails to be switched independently. During deep-sleep states, the OE pin can be driven low to 3-state both ports, isolating the sleeping domain from the active domain and preventing leakage through the translator. The 100 Mbps capability is far beyond typical portable-device bus needs, giving generous timing margin. Designers should sequence VCC(A) and VCC(B) per the datasheet power-up recommendations to avoid unwanted current paths during battery insertion and hot-swapping events.
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Industrial Sensor Interfaces
Industrial controllers often pair 3.3 V or 5 V sensor ecosystems with low-voltage MCU ports, and the NTB0102GT,115 bridges these domains with its 1.65-5.5 V B-side range. The GT suffix ordering option and automotive temperature grading noted by distributors support deployments in extended-temperature industrial cabinets. Sensor buses such as I2C, SPI, and simple status lines all translate cleanly with auto-direction sensing, and the 3-state OE input allows a host to isolate the sensor bus during fault conditions or reconfiguration. Because factory environments add cable capacitance, verify that the effective data rate with bus loading still meets protocol timing - the 4.8 ns nominal delay assumes light loading. External pull-ups sized per bus capacitance are recommended on I2C channels.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für NTB0102GT,115 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | NTB0102GT,125 | NTS0102GT,115 | NTB0102BQ,115 |
|---|---|---|---|---|
| Package | 8-XSON SOT833-1 (1.95 x 1 mm) | 8-XSON SOT833-1 - identical | 8-XSON SOT833-1 - identical | DHVQFN-8 (2.5 x 1.5 mm) - differs, PCB change required |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Bits | 2 | 2 | 2 | 2 |
| VCC(A) Range | 1.2 V to 3.6 V | 1.2 V to 3.6 V | 1.2 V to 3.6 V | 1.2 V to 3.6 V |
| VCC(B) Range | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
| Architecture | Auto direction sensing (10 kohm A-side pull-ups) | Auto direction sensing - same | Push-pull driver - differs | Auto direction sensing - same |
| Output Enable (3-state) | Yes (OE pin) | Yes (OE pin) | Yes (OE pin) | Yes (OE pin) |
| Lifecycle Status | Active | Active | Active | Active |
Wichtigste Unterscheidungsmerkmale
- 1.2 V minimum VCC(A) supports newest low-voltage process nodes (vs. TXS0102DCUR (TI))
- Ultra-compact 1.95 x 1 mm SOT833-1 leadless package (vs. NTB0102BQ,115)
- Zero-firmware auto direction sensing (vs. NTS0102GT,115)
- Trade-off: weak pull-ups limit heavy loads (vs. NTS0102GT,115)
Designhinweise
The NTB0102's auto-direction sensing relies on weak (nominally 10 kohm) internal A-side pull-ups, so bus loading directly affects edge rates and the achievable data rate. The 100 Mbps rating assumes light capacitive loading; with long traces, stubs, or multiple loads, effective throughput drops. For heavily loaded bidirectional buses, verify rise/fall times against protocol timing, or switch to the pin-compatible push-pull NTS0102GT,115, which provides active drive in both directions and tolerates higher load capacitance at the same footprint.
Use the OE pin for power sequencing. When VCC(A) and VCC(B) ramp at different times, a translator with I/O actively driven can back-power a sleeping rail through ESD protection diodes, causing brownout or excessive current. Holding OE low during power-up 3-states both ports and eliminates this path. Additionally, keep both supply pins decoupled with 100 nF ceramic capacitors placed within a few millimeters of pins 6 and 8; the leadless SOT833-1 package has very short internal bonds, so layout dominates the decoupling loop inductance.
The 8-XSON SOT833-1 package is 1.95 mm x 1 mm with a 0.5 mm pitch and no outward leads - solder paste printing and reflow profiling must follow NXP's SOT833-1 application hints in the datasheet. The center underside of a DHVQFN variant (NTB0102BQ) has an exposed die pad, but the SOT833-1 does not, so do not copy land patterns between the two. For X-ray or AOI inspection, leadless packages benefit from a slight paste aperture reduction to limit solder bridging on the 0.5 mm pitch.
Do not exceed VCC(A) = 3.6 V or VCC(B) = 5.5 V - the 1.2 V minimum on the A-side is also a hard limit below which the I/O structures no longer meet logic thresholds. Do not use the NTB0102 with open-drain buses that rely on strong external pull-downs or multi-master contention without verifying direction-detection behavior; auto-direction devices can momentarily misinterpret drive ownership during fast bus turnarounds. Finally, the ,115 and ,125 suffixes differ in packing/grade detail - confirm the ordering code against NXP's ordering information before release.
Compliance-Informationen
Verified web data did not include explicit RoHS/REACH/halogen declarations. NXP lists the NTB0102GT,115 under its Environmental Compliance program on the product page (nxp.com/part/NTB0102GT); consult that page for current RoHS, REACH, and halogen-free certificates. Distributor (Partstack) classifies the part with an automotive temperature grade.
