NXP Semiconductors 74HC20D,652

Overview

74HC20D,652 from Nexperia is a dual 4-input NAND gate in SO14 (SOT108-1) package, operating from 2.0 V to 6.0 V supply, delivering propagation delays as low as 8 ns at VCC = 6.0 V and CL = 50 pF, with ±25 mA output drive capability and specified for -40 °C to +125 °C industrial temperature range. It serves as a core combinational logic element in digital control subsystems, bus interface logic, and address decoding circuits.

For engineers reviewing the 74HC20D,652 datasheet, 74HC20D,652 pinout, 74HC20D,652 application, or 74HC20D,652 equivalent, key selection criteria include supply voltage flexibility (2.0–6.0 V), guaranteed high-noise-immunity CMOS input thresholds, dual independent gate structure, SO14 thermal and mechanical compatibility, and industrial-grade temperature qualification.

Technical Context

The 74HC20D implements two fully independent 4-input NAND gates sharing only VCC and GND rails. Each gate's output drives standard CMOS loads with rail-to-rail swing and exhibits symmetrical tPHL/tPLH propagation delay behavior across its full operating voltage and temperature range.

Input clamping diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The device 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).

Key Specifications

Pinout & Package

74HC20D,652 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC20D,652, the TSSOP variant saves board area but requires finer-pitch assembly, while the TI part trades 5 ns of speed margin for higher ESD resilience-both retain full functional and pinout compatibility for drop-in substitution in non-critical timing paths.

Availability

74HC20D,652 is available at Aetrix Electronics and suitable for industrial automation, embedded control, and legacy system maintenance requiring stable component supply, long-term lifecycle assurance, and SO14-compatible packaging.

Supply support for 74HC20D,652 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 semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer applications.

The 74HC20 belongs to Nexperia's 74HC High-Speed CMOS Logic family, engineered for low-power, wide-voltage digital logic functions in cost-sensitive, thermally demanding, and long-lifecycle industrial systems.

FAQ

Is 74HC20D,652 pin-compatible with older 74LS20 devices?

No-74HC20D,652 has identical pinout to 74LS20 (SO14), but differs in electrical behavior: it uses CMOS inputs (VIH/VIL ratios scale with VCC), draws microampere quiescent current versus milliampere LS current, and operates down to 2.0 V. Direct replacement requires verifying voltage compatibility and removing LS-series pull-ups if present.

Can 74HC20D,652 drive a 50 pF load at 10 MHz without signal degradation?

Yes-its typical propagation delay is 8 ns at VCC = 6.0 V and CL = 50 pF, and output transition time (tt) is 6–13 ns. With 25 mA drive strength and 3.5 pF input capacitance, it maintains clean edges and meets setup/hold timing for 10 MHz synchronous logic when properly decoupled and routed.

What is the maximum continuous output current per pin for 74HC20D,652?

The absolute maximum DC output current per pin is ±25 mA, as specified in Table 4 (Limiting Values). However, sustained operation at this level requires adherence to total power dissipation limits (500 mW for SO14) and thermal derating above 100 °C (10.1 mW/K), with simultaneous switching of multiple outputs reducing allowable per-pin current.

Does 74HC20D,652 require external pull-up or pull-down resistors on unused inputs?

No-unused inputs must be tied to VCC or GND to prevent floating states that cause increased power consumption and potential oscillation. The device does not contain internal pull resistors; leaving inputs unconnected violates recommended operating conditions and risks erratic behavior or excessive ICC.