NXP Semiconductors 74HC258DB,118

Overview

74HC258DB,118 from NXP Semiconductors is a quad 2-input CMOS multiplexer with inverting 3-state outputs, pin-compatible with LSTTL, operating from −40 °C to +125 °C with supply voltage range 2.0–6.0 V. It selects 4-bit data from two sources using a common select input (S), forces outputs to high-impedance when OE is HIGH, and implements logic-equivalent 4-pole/2-position switching for bus-sharing applications.

For engineers reviewing the 74HC258DB,118 datasheet, 74HC258DB,118 pinout, 74HC258DB,118 application, or 74HC258DB,118 equivalent, key selection criteria include its inverting output behavior versus 74HC257, guaranteed 3-state timing (enable/disable <45 ns at VCC = 4.5 V), −40 °C to +125 °C industrial temperature rating, SSOP16 package footprint, and JEDEC 7A compliance.

Technical Context

The 74HC258DB,118 integrates four independent 2:1 multiplexers sharing one data select (S) and one output enable (OE) control line. Each channel routes either source-0 (nI0) or source-1 (nI1) input to its corresponding inverted output (nY), with output state determined by S and OE logic levels per the function table.

Its 3-state outputs interface directly with shared system buses, while the inverting data path distinguishes it from the non-inverting 74HC257. The device uses Si-gate CMOS technology, delivers propagation delays as low as 9 ns (VCC = 6.0 V, CL = 15 pF), and supports dynamic power calculation via CPD = 55 pF per multiplexer.

Key Specifications

Pinout & Package

74HC258DB,118 is housed in a plastic shrink small outline package (SSOP16) with 16 leads, 5.3 mm body width, and 0.65 mm lead pitch - optimized for high-density PCB layouts requiring compact logic integration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input multiplexer applications.

Compared with 74HC258DB,118, the 74HC257D,653 offers functional equivalence minus inversion-ideal for non-inverting bus architectures-while SN74LV258APWR trades JEDEC 7A compliance and 6.0 V tolerance for lower-voltage optimization and different packaging, necessitating layout revision.

Availability

74HC258DB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, legacy system bus interface, and automated test equipment signal routing requiring stable component supply across extended temperature ranges.

Supply support for 74HC258DB,118 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74HC258DB,118 belongs to NXP's high-speed CMOS logic family designed for robust, pin-compatible replacements of legacy TTL devices in noise-sensitive and thermally demanding environments.

FAQ

What is the maximum supply voltage rating for the 74HC258DB,118?

The 74HC258DB,118 has an absolute maximum supply voltage (VCC) of +7.0 V, but its recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V voids guaranteed performance and risks permanent damage per Table 4 limiting values. For long-term reliability in industrial applications, NXP specifies 6.0 V as the upper limit for continuous operation.

Does the 74HC258DB,118 support hot insertion into a live bus?

The 74HC258DB,118 is not rated for hot insertion. Its input clamping current (±20 mA) and output clamping current (±20 mA) provide limited protection, but the device lacks dedicated hot-swap circuitry. Applying VCC or signals before establishing proper GND connection may exceed IIK/IOK limits. Use external series resistors or dedicated hot-swap controllers if live insertion is required in the target system.

How does the inverting output behavior of the 74HC258DB,118 affect timing analysis?

The 74HC258DB,118 inverts data at each output (1Y–4Y), meaning propagation delay (tpd) includes both logic evaluation and inversion. Measured tpd values (e.g., 9 ns at VCC = 6.0 V) already account for this; no additional delay margin is needed. However, setup/hold timing for downstream latches must reference the inverted edge-designers should verify that the inverted output transition aligns with the sampling clock's active edge in their specific application.

Can the 74HC258DB,118 be used with 3.3 V logic systems?

Yes, the 74HC258DB,118 operates reliably at 3.3 V: VIH(min) = 2.1 V and VIL(max) = 1.35 V at VCC = 4.5 V, and its 2.0–6.0 V range fully covers 3.3 V nominal supplies. Output VOH(min) = 3.84 V at IO = −6 mA ensures compatible high-level drive into 3.3 V CMOS inputs. Ensure system ground referencing and decoupling per NXP Application Note AN10862.

What is the thermal resistance (θJA) of the 74HC258DB,118 in its SSOP16 package?

NXP does not publish θJA for the 74HC258DB,118 specifically, but the SSOP16 package (SOT338-1) has a typical θJA of 130 °C/W on a 1-layer 1 in² copper pad. With a 500 mW power dissipation limit at ≤70 °C ambient, junction temperature rise would be ~65 °C - resulting in TJ ≈ 135 °C, within the +125 °C max rating only if ambient is kept below 60 °C. For sustained 125 °C operation, reduce power or improve PCB copper area.