onsemi MC74HC1G02DTT1

Overview

MC74HC1G02DTT1 from onsemi is a single 2-input NOR gate in SC-74A (SOT-23-5) package, fabricated with silicon gate CMOS technology. It delivers high-speed logic operation (t_PD = 7 ns typ at V_CC = 5 V), ±2 mA symmetrical output drive, and operates across −55 °C to +125 °C for industrial and automotive signal conditioning.

For engineers reviewing the MC74HC1G02DTT1 datasheet, pinout, applications, or equivalent options, key selection factors include its rail-to-rail input compatibility (V_IN = 0–V_CC), low quiescent current (I_CC ≤ 1 µA max at 25 °C), AEC-Q100 qualification, and SC-74A footprint suitability for space-constrained PCBs.

Technical Context

The MC74HC1G02DTT1 implements a two-stage CMOS NOR gate with buffered output, providing high noise immunity and balanced propagation delays (t_PLH ≈ t_PHL). Its internal design ensures stable switching under varying load and temperature conditions.

It supports wide V_CC range (2.0–6.0 V), features symmetrical output impedance (I_OH = I_OL = ±2 mA), and meets ESD robustness per HBM (2000 V) and CDM (1000 V) standards - critical for board-level reliability in mixed-signal environments.

Key Specifications

Pinout & Package

MC74HC1G02DTT1 uses the SC-74A (SOT-23-5) package: 3.00 mm × 1.50 mm × 0.95 mm body, 0.95 mm pitch, lead-free, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input NOR gate applications.

Compared with SN74LVC1G02DBVR and 74AUP1G02GW,125, the MC74HC1G02DTT1 uniquely balances extended temperature support (−55 °C to +125 °C), AEC-Q100 qualification, and ±2 mA drive - making it the preferred choice for automotive and harsh-environment industrial logic interfacing where reliability trumps marginal speed or ultra-low leakage.

Availability

MC74HC1G02DTT1 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and portable medical device designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant logic functions.

Supply support for MC74HC1G02DTT1 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

onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74HC1G02DTT1 belongs to onsemi's HC-series logic family, designed for high-noise-immunity, rail-to-rail CMOS logic interfacing in mission-critical embedded systems where reliability across extreme temperatures is essential.

FAQ

What is the maximum operating temperature for MC74HC1G02DTT1?

The MC74HC1G02DTT1 is rated for operation from −55 °C to +125 °C, meeting industrial and automotive Grade 1 requirements. This specification is validated per the datasheet's Recommended Operating Conditions table and confirmed by its AEC-Q100 qualification status - ensuring reliable performance in under-hood or factory-floor environments where thermal stress is significant. The MC74HC1G02DTT1 maintains specified timing and DC parameters across this full range.

Does MC74HC1G02DTT1 support 3.3 V logic systems?

Yes, MC74HC1G02DTT1 fully supports 3.3 V operation: its V_CC range is 2.0 V to 6.0 V, and all AC/DC specifications - including VIH/VIL thresholds, VOH/VOL levels, and t_PD - are guaranteed at 3.3 V. Input thresholds scale with V_CC, and output drive remains ±2 mA, making MC74HC1G02DTT1 interoperable with standard 3.3 V CMOS families without level translation.

Is MC74HC1G02DTT1 pin-compatible with other SC-74A 5-pin logic gates?

MC74HC1G02DTT1 follows the standard SC-74A pinout for single-gate logic: Pin 1 = GND, Pin 2 = B, Pin 3 = A, Pin 4 = V_CC, Pin 5 = Y. This matches industry-standard assignments for 74HC/LVC/AUP single-gate devices in SOT-23-5, enabling layout reuse across functionally similar parts - though electrical characteristics (e.g., drive strength, speed, temp range) must still be verified per application. The MC74HC1G02DTT1 pinout is explicitly shown in Figure 1 of its datasheet.

What is the typical propagation delay of MC74HC1G02DTT1 at 5 V?

The typical propagation delay (t_PD) of MC74HC1G02DTT1 is 7 ns at V_CC = 5.0 V, C_L = 15 pF, and T_A = 25 °C, as specified in the AC Electrical Characteristics table. This value represents the average of t_PLH and t_PHL, which are balanced due to symmetrical output impedance - a key design feature of the MC74HC1G02DTT1 that ensures predictable timing in feedback or cascaded logic paths.

Does MC74HC1G02DTT1 require external pull-up or pull-down resistors on inputs?

No, MC74HC1G02DTT1 does not require external pull-up or pull-down resistors on inputs A or B. Its CMOS inputs have negligible leakage (I_IN ≤ 1.0 µA max), and the internal structure provides defined logic states when driven. However, floating inputs must be avoided - unused inputs should be tied to V_CC or GND to prevent metastability and excessive current draw. This behavior is inherent to the MC74HC1G02DTT1's silicon gate CMOS process and is documented in the datasheet's DC Electrical Characteristics.