NXP Semiconductors NTS0102JKZ

Overview

NTS0102JKZ from NXP Semiconductors is a 2-bit dual-supply translating transceiver with auto-direction sensing and open-drain I/O, enabling bidirectional level translation between 1.65 V–3.6 V (A-side) and 2.3 V–5.5 V (B-side). It supports up to 50 Mbit/s data rate in push-pull mode, features IOFF partial power-down protection, and operates across –40 °C to +125 °C for industrial I²C/SMBus interfacing.

For engineers reviewing the NTS0102JKZ datasheet, NTS0102JKZ pinout, NTS0102JKZ application, or NTS0102JKZ equivalent, this page delivers verified supply voltage ranges, propagation delay specs (e.g., tPHL ≤ 7.3 ns at –40 °C to +125 °C), ESD ratings (8 kV HBM Class 3B on B port), thermal operating limits, and package-specific layout guidance for X2SON8 (SOT2015-1).

Technical Context

The NTS0102JKZ implements a switch-type architecture using an N-channel pass-gate transistor with gate bias set ~1 V_TH above the low-voltage supply, enabling passive bidirectional translation without external direction control. Its output edge-rate accelerator (one-shot circuit) detects rising edges at ~V_CCI/2 and temporarily bypasses internal 10 kΩ pull-ups with PMOS transistors to reduce t_TLH under capacitive load.

IOFF circuitry disables outputs during power-down, blocking backflow current when either VCC(A) or VCC(B) is at GND. Internal 10 kΩ pull-up resistors are present on all A- and B-side I/Os (referenced to respective supplies), and OE is active-HIGH, referenced to VCC(A).

Key Specifications

Pinout & Package

NTS0102JKZ is packaged in X2SON8 (SOT2015-1): 8-terminal, no-lead, 1.35 mm × 1.0 mm × 0.32 mm body, 0.35 mm pitch. Pin 1 index area located at top-left corner in transparent top view.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply translating transceiver applications.

Compared with NTB0102DP and TXS0102DCUR, the NTS0102JKZ uniquely combines auto-direction sensing, IOFF protection, and industry-leading 8 kV HBM on the B port - making it optimal for noise-prone, hot-swappable I²C/SMBus nodes where reliability and minimal external components are critical.

Availability

NTS0102JKZ is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device design requiring stable component supply, extended temperature operation (–40 °C to +125 °C), and high-reliability level translation.

Supply support for NTS0102JKZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with core expertise in interface, power management, and RF technologies.

The NTS0102 product line delivers compact, low-power voltage translators for mixed-supply systems, specifically engineered for robust I²C, SMBus, and GPIO bridging in harsh environments where power sequencing and ESD immunity are critical.

FAQ

What is the maximum allowable voltage difference between VCC(A) and VCC(B) for reliable operation of the NTS0102JKZ?

The NTS0102JKZ requires VCC(A) ≤ VCC(B) during steady-state operation per datasheet Section 9. This is enforced by the internal gate-bias architecture. While VCC(A) may briefly exceed VCC(B) during power-up without damage, sustained violation risks incorrect pass-gate turn-on and unreliable translation. For example, pairing VCC(A) = 3.3 V with VCC(B) = 2.5 V is invalid; valid combinations include VCC(A) = 1.8 V / VCC(B) = 3.3 V or VCC(A) = 3.3 V / VCC(B) = 5.0 V. Always validate with the recommended operating conditions table.

Does the NTS0102JKZ support true bidirectional communication on the same pin pair without external control?

Yes, the NTS0102JKZ supports true bidirectional communication on each A/B pin pair (e.g., A1↔B1) without external direction signals. Its auto-direction sensing uses internal edge-detection circuitry to dynamically enable the pass-gate transistor in the correct direction based on signal transitions. This is confirmed in the functional description (Section 7) and architecture diagram (Figure 11), where the "ONE SHOT" logic triggers conduction only when a rising edge crosses VCCI/2 - eliminating need for a DIR pin unlike alternatives such as NTB0102DP.

How does the IOFF feature of the NTS0102JKZ protect the system during partial power-down?

The IOFF circuitry in the NTS0102JKZ disables all I/Os and blocks current flow when either VCC(A) or VCC(B) drops to GND, preventing damaging backflow current through the device. Per Section 1, this is achieved by disabling the output stage and isolating the pass-gate transistor. Measured IOFF leakage is ≤±12 μA (Table 9), ensuring safe hot-swap and multi-rail sequencing. This behavior is distinct from standard high-impedance states and is explicitly validated for partial power-down applications - a key differentiator versus non-IOFF translators.

Can the internal 10 kΩ pull-up resistors on the NTS0102JKZ be used for standard I²C bus termination?

Yes, the NTS0102JKZ integrates 10 kΩ pull-up resistors on both A- and B-side I/Os (Section 13.7), directly satisfying standard I²C bus requirements for 100 kHz and 400 kHz modes. These resistors are referenced to their respective supplies (VCC(A) for A ports, VCC(B) for B ports) and are automatically disabled when OE = LOW. For faster modes (1 MHz+) or heavier bus capacitance, external lower-value pull-ups may be added in parallel - but doing so lowers VOL and must be verified against sink-current limits (±50 mA per port).

What PCB layout considerations are critical for maintaining 50 Mbit/s performance with the NTS0102JKZ?

To sustain 50 Mbit/s operation, PCB layout must limit total trace capacitance to ≤15 pF (per Figure 9 test condition) and ensure round-trip signal reflection delay stays within the one-shot pulse duration (~50 ns). This requires short, direct traces (<25 mm), avoidance of stubs or vias near I/O pins, and grounding of the X2SON8 center pad (SOT2015-1) for thermal stability. Heavy capacitive loads risk incomplete rail transition during acceleration, causing timing violations - verified in Section 13.4 and dynamic characteristics tables (Tables 10–11).