Diodes Incorporated 74LVC1G02Z-7

Overview

74LVC1G02Z-7 from Diodes Incorporated is a single 2-input positive NOR gate in SOT553 package, operating from 1.65V to 5.5V supply, with ±24mA output drive at 3.3V, 5.5V-tolerant inputs, and IOFF partial-power-down protection. It performs Boolean Y = A + B logic and is used for voltage-level shifting and power-down signal isolation in portable computing peripherals.

For engineers reviewing the 74LVC1G02Z-7 datasheet, 74LVC1G02Z-7 pinout, 74LVC1G02Z-7 application, or 74LVC1G02Z-7 equivalent, key selection criteria include supply voltage flexibility (1.65–5.5V), 5.5V input tolerance for mixed-voltage interfacing, IOFF-enabled safe power-down behavior, and compact 1.6mm × 1.6mm SOT553 footprint for space-constrained designs.

Technical Context

This device implements standard CMOS NOR logic with push-pull output stage, supporting rail-to-rail input voltage range up to 5.5V independent of VCC. Its IOFF circuit actively disables output leakage during power-down, preventing backflow current when VCC = 0V while inputs remain biased.

Propagation delay is specified from 0.5ns (at 5.0V) to 10.5ns (at 1.8V, –40°C to +85°C), with consistent 14pF power dissipation capacitance across 1.8V–5.0V operation. Input thresholds scale with VCC (e.g., VIH = 0.7×VCC at 4.5–5.5V), enabling reliable TTL- and LVTTL-compatible interfacing.

Key Specifications

Pinout & Package

SOT553 package: 1.6mm × 1.6mm × 0.62mm body, 0.5mm lead pitch, 5-pin configuration with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G02DBVR and 74AUP1G02GW,125, the 74LVC1G02Z-7 uniquely balances ultra-compact size, 5.5V input tolerance, and ±24mA drive - making it optimal for space-constrained, mixed-voltage portable electronics requiring robust power sequencing.

Availability

74LVC1G02Z-7 is available at Aetrix Electronics and suitable for USB-C PD controller designs, portable display subsystems, and industrial sensor interface modules requiring stable component supply, long-term lifecycle assurance, and RoHS/halogen-free compliance.

Supply support for 74LVC1G02Z-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in certified facilities compliant with IATF 16949 and ISO 9001.

The 74LVC logic family targets high-speed, low-voltage general-purpose digital interfacing, emphasizing mixed-supply compatibility, power-down safety, and footprint scalability across SOT and DFN packages.

FAQ

Can 74LVC1G02Z-7 operate with VCC = 1.5V?

No. The absolute minimum recommended operating voltage is 1.65V per DS32197 Rev. 11–2. At 1.5V, output drive collapses below specification, propagation delay becomes unpredictable, and input thresholds fall outside guaranteed switching windows - risking functional failure in real-world conditions.

Is the NC pin on SOT553 electrically connected?

No. Pin 3 in the SOT553 top-view diagram is labeled "NC" (No Connection) and is not bonded internally. It must remain unconnected on the PCB; soldering or routing to this pad provides no electrical benefit and may compromise mechanical reliability.

Does IOFF functionality require external biasing?

No. IOFF activates automatically when VCC = 0V, regardless of input voltage. No external pull-up/down resistors or control signals are needed - the internal circuitry detects VCC absence and disables the output FETs to block current flow in either direction.

What is the maximum capacitive load this device can drive reliably?

Based on Cpd = 14pF and tPD = 4.5ns (typical at 3.3V), the device reliably drives ≤30pF total load (including trace and input capacitance) while maintaining <10% duty-cycle distortion at 50MHz toggle rates. For >30pF, series termination or buffer staging is recommended.