Nexperia USA Inc. 74HC20D,653

Overview

74HC20D,653 from Nexperia is a dual 4-input NAND gate in SO14 package, operating from 2.0 V to 6.0 V supply, delivering propagation delays as low as 8 ns at VCC = 5.0 V/CL = 15 pF, with ±25 mA output drive capability and guaranteed operation from −40 °C to +125 °C - used for logic-level signal inversion and combinational control in industrial I/O modules.

For engineers reviewing the 74HC20D,653 datasheet, 74HC20D,653 pinout, 74HC20D,653 application, or 74HC20D,653 equivalent, key selection criteria include input voltage thresholds (VIH = 3.15 V min at VCC = 4.5 V), output drive strength under load (VOH = 3.98 V min at IO = −4.0 mA), thermal derating behavior above 100 °C, and compatibility with 3.3 V and 5 V mixed-signal systems.

Technical Context

This device implements two independent CMOS NAND gates, each accepting four inputs and producing one active-low output. All inputs feature integrated clamp diodes enabling safe interfacing to voltages exceeding VCC when current-limiting resistors are used.

It complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), supports HBM ESD >2000 V and CDM >1000 V, and meets latch-up immunity per JESD78 Class II Level B (>100 mA). Logic function is fully static and TTL-compatible at VCC ≥ 4.5 V.

Key Specifications

Pinout & Package

74HC20D,653 is supplied in SOT108-1 (SO14): plastic small outline package, 14 leads, body width 3.9 mm, standard JEDEC MS-012 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC20DR and 74HC20PW,118, the 74HC20D,653 offers the fastest propagation delay in SO14 form factor and full thermal compatibility with industrial motor-control environments up to 125 °C ambient.

Availability

74HC20D,653 is available at Aetrix Electronics and suitable for industrial PLCs, motor drive controllers, embedded power sequencers, and legacy bus interface modules requiring stable component supply across extended temperature ranges.

Supply support for 74HC20D,653 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC High-Speed CMOS Logic family targets cost-sensitive, high-reliability applications demanding wide voltage range, robust ESD tolerance, and extended temperature operation - especially where legacy TTL replacement or mixed-voltage interfacing is required.

FAQ

What is the maximum recommended operating frequency for 74HC20D,653 in a 5 V system?

The 74HC20D,653 does not specify a maximum clock frequency, as it is a combinational logic device. Its usable toggle rate depends on propagation delay and system loading. At VCC = 5.0 V and CL = 15 pF, tpd = 8 ns (typ), supporting reliable operation in logic paths with >50 MHz effective toggle rates. For sustained high-speed use, ensure output load capacitance remains ≤50 pF and maintain proper decoupling.

Can 74HC20D,653 safely interface with 24 V sensors without external protection?

No - while its inputs include clamp diodes, they only protect against voltages exceeding VCC by ≤0.5 V. Direct 24 V connection will exceed absolute maximum ratings. A series current-limiting resistor (e.g., 100 kΩ for ~200 μA) is mandatory to limit IIK to ±20 mA max, as specified in Table 4. Without that resistor, permanent damage occurs.

Are pins 3 and 11 internally connected or truly unconnected?

Pins 3 and 11 are explicitly defined as "not connected" (n.c.) in Table 2 of the datasheet. They have no internal bond wire or silicon connection. These pins may be left floating, tied to GND, or tied to VCC depending on mechanical or EMI requirements - but no electrical function is affected either way.

How does thermal derating affect power dissipation above 100 °C?

For the SO14 package (SOT108-1), total power dissipation derates linearly at 10.1 mW/K above 100 °C. At 125 °C ambient, Ptot drops to 500 mW − (25 K × 10.1 mW/K) = 247 mW. This must be accounted for in worst-case power calculations - e.g., if ICC = 20 μA and IO = ±10 mA, total dissipation must stay below this limit to avoid thermal runaway.