Texas Instruments SN74F253DRG4

Overview

SN74F253DRG4 from Texas Instruments is a dual 4-line to 1-line data selector/multiplexer with independent 3-state outputs, designed for bus-organized digital systems. It features two independent 4:1 multiplexer sections (1Y and 2Y), common select inputs (A/B), separate strobe controls (1G/2G), operates at 4.5–5.5 V, and is rated for 0°C to 70°C ambient temperature.

For engineers reviewing the SN74F253DRG4 datasheet, SN74F253DRG4 pinout, SN74F253DRG4 application, or SN74F253DRG4 equivalent, key selection criteria include propagation delay (tPLH/tPHL ≤13 ns), output drive capability (IOL = 24 mA), 3-state bus interface compatibility, and SOIC-16 packaging for high-density PCB layouts.

Technical Context

The SN74F253DRG4 implements TTL-compatible positive-logic multiplexing using AND-OR-invert gate architecture with internal inverters and drivers for full binary decoding. Each section independently selects one of four data inputs (C0–C3) based on A/B address lines and enables its output via dedicated strobe (G) control.

Its 3-state outputs support bidirectional bus sharing: when a strobe is high, the corresponding Y output enters high-impedance state; only the enabled output drives the bus line to valid logic levels (VOH ≥2.4 V, VOL ≤0.5 V), enabling time-multiplexed data routing in shared-data-path systems.

Key Specifications

Pinout & Package

SN74F253DRG4 is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012, with 1.27 mm pitch, 10.3 mm body width, and RoHS-compliant NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4:1 multiplexer applications.

Compared with SN74LS253N and SN74HC153DR, the SN74F253DRG4 delivers superior speed and drive strength for legacy TTL bus environments, while maintaining pin-for-pin compatibility with other '253 family members-making it the optimal choice for drop-in replacement in existing 74F-based systems requiring robust 5-V operation.

Availability

SN74F253DRG4 is available at Aetrix Electronics and suitable for industrial control systems, legacy microprocessor upgrades, and test equipment requiring stable component supply with long-term obsolescence mitigation.

Supply support for SN74F253DRG4 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

Texas Instruments is a U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic ICs for industrial, automotive, and communications markets.

The SN74F253DRG4 belongs to TI's 74F Fast TTL logic family, engineered for high-speed digital signal routing in commercial-grade systems where performance, reliability, and backward compatibility with legacy TTL designs are critical.

FAQ

What is the maximum clock frequency supported by SN74F253DRG4 in multiplexer mode?

The SN74F253DRG4 does not operate as a clocked device but as a combinational logic multiplexer. Its usable switching frequency depends on propagation delay and system timing margins: with tPHL/tPLH ≤13 ns and setup/hold times met, it reliably supports data routing in systems with clock periods >26 ns (i.e., <38 MHz). The SN74F253DRG4 is commonly deployed in 8–20 MHz microcontroller bus architectures.

Does SN74F253DRG4 support hot insertion or live bus swapping?

No, the SN74F253DRG4 is not hot-swap rated. Its absolute maximum ratings specify that VCC must be applied before any input or output signals, and the device lacks bus-fault protection or power-up sequencing logic. Applying signals while unpowered risks exceeding input voltage limits (−1.2 V to 7 V) and may cause latch-up. Always power the SN74F253DRG4 before asserting control or data lines.

Can SN74F253DRG4 replace SN74F153 in existing designs?

Yes-the SN74F253DRG4 is the 3-state version of the SN74F153 and shares identical pinout, select logic, and data routing functionality. The key difference is that SN74F253DRG4 adds independent 3-state enable (1G/2G) pins instead of a single enable, allowing per-section bus isolation. No PCB changes are needed, but firmware must assert strobes appropriately to maintain output control.

What is the recommended decoupling for SN74F253DRG4 in high-speed layouts?

TI recommends a 0.1 µF ceramic capacitor placed within 3 mm of the SN74F253DRG4 VCC pin to ground, plus a bulk 4.7 µF tantalum or aluminum electrolytic capacitor per 5–10 ICs on the same 5-V rail. This suppresses transient current spikes from simultaneous output switching (IOL = 24 mA × 2 = 48 mA peak) and maintains stable VOH/VOL under dynamic load conditions.

Is SN74F253DRG4 compliant with modern RoHS and REACH requirements?

Yes-SN74F253DRG4 is RoHS-compliant (lead-free NiPdAu finish) and meets REACH SVHC thresholds per TI's published declarations. It carries MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is qualified for reflow per J-STD-020 at 260°C peak. Full compliance documentation is available in TI's Package Option Addendum dated 11-Nov-2025.