onsemi NLV74HC20ADR2G

Overview

NLV74HC20ADR2G from onsemi is a dual 4-input NAND gate in SOIC-14 package, designed for high-performance silicon-gate CMOS logic applications requiring 2 V to 6 V supply operation, ≤15 ns propagation delay at 6 V, and compatibility with LSTTL and standard CMOS outputs - used in industrial control logic sequencing and power-on reset signal conditioning.

For engineers reviewing the NLV74HC20ADR2G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 10 LSTTL load drive capability, −55 °C to +125 °C operating temperature range, NC pin configuration (Pins 3 & 11), and Pb-free RoHS-compliant SOIC-14 packaging suitable for automated SMT assembly.

Technical Context

The NLV74HC20ADR2G implements two independent 4-input NAND gates using high-speed silicon-gate CMOS technology, with inputs tolerant of both CMOS and LSTTL voltage levels when pullup resistors are applied. Each gate exhibits identical pinout to TTL LS20, enabling legacy design reuse.

It features low input current (±0.1 µA max), high noise immunity, and rail-to-rail output swing - supporting mixed-voltage system interfacing across 2 V–6 V VCC. Unused inputs must be tied to VCC or GND per datasheet requirement.

Key Specifications

Pinout & Package

Package: SOIC-14 (Case 751A), 3.9 mm × 8.7 mm body, 1.27 mm pitch, Pb-free/RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-input NAND gate applications.

Compared with MC74HC20ADR2G, NLV74HC20ADR2G offers identical electrical performance and packaging but targets high-reliability industrial use with tighter process controls; versus SN74HC20DR, it delivers equivalent timing and drive strength with onsemi's extended temperature validation and automotive-grade traceability options.

Availability

NLV74HC20ADR2G is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and power management systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for NLV74HC20ADR2G 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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.

NLV74HC20ADR2G belongs to the NLV74HC logic family - engineered for extended temperature operation and high-reliability industrial deployment, emphasizing robustness, low static power, and seamless TTL/CMOS interoperability.

FAQ

What is the maximum propagation delay of NLV74HC20ADR2G at 5 V supply?

The maximum propagation delay (tPLH/tPHL) for NLV74HC20ADR2G is 18 ns at VCC = 4.5 V and 23 ns at VCC = 3.0 V, per the onsemi datasheet AC Electrical Characteristics table. At exactly 5.0 V, interpolation yields ~20 ns - confirmed by typical characterization data. This value applies to any input-to-output path (A/B/C/D → Y) under loaded conditions (50 pF, 1 kΩ). NLV74HC20ADR2G maintains consistent timing across its full operating temperature range.

Does NLV74HC20ADR2G require external pull-up resistors for LSTTL compatibility?

NLV74HC20ADR2G inputs are compatible with LSTTL outputs only when external pull-up resistors are applied - the device itself does not integrate pull-ups. The datasheet specifies that with appropriate pullups (typically 1–10 kΩ to VCC), inputs accept LSTTL voltage levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V). Without pullups, NLV74HC20ADR2G operates natively with CMOS-level inputs (VIH ≥ 3.15 V at 4.5 V VCC). This dual-mode interface flexibility is a core design feature of NLV74HC20ADR2G.

Are Pins 3 and 11 on NLV74HC20ADR2G safe to connect to ground or VCC?

No - Pins 3 and 11 of NLV74HC20ADR2G are No Connect (NC) terminals and must remain unconnected. The onsemi datasheet explicitly states these pins are internally unconnected; routing them to ground, VCC, or any signal violates the device's validated design and may cause unpredictable behavior or increased leakage. PCB layout must leave these pads floating with no trace or thermal relief. This NC configuration is fixed for the SOIC-14 variant of NLV74HC20ADR2G and differs from some TSSOP variants.

What is the quiescent supply current (ICC) specification for NLV74HC20ADR2G at 6 V?

The maximum quiescent supply current (ICC) for NLV74HC20ADR2G is 40 µA at VCC = 6.0 V and TA = 125 °C, per the DC Electrical Characteristics table. At 25 °C, ICC is guaranteed ≤1 µA. This ultra-low standby current enables NLV74HC20ADR2G to be used in always-on subsystems such as battery-backed security monitors or wake-on-event logic without significant drain. All inputs must be held static (VCC or GND) during quiescent measurement - floating inputs increase ICC substantially.

Is NLV74HC20ADR2G pin-compatible with the obsolete 74LS20 TTL device?

Yes - NLV74HC20ADR2G is explicitly designed with identical pinout to the 74LS20, as confirmed in the onsemi datasheet: "The MC74HC20A is identical in pinout to the LS20." This allows direct PCB replacement in legacy designs, provided supply voltage is adjusted to 2–6 V (not 5 V only) and unused inputs are properly terminated. However, NLV74HC20ADR2G does not replicate LS20's bipolar output structure - it uses CMOS totem-pole outputs with higher impedance and rail-to-rail swing, which may affect rise/fall times in heavily loaded traces.