Renesas 74LS139FPEL-E

Overview

74LS139FPEL-E from Renesas Electronics is a dual 2-line-to-4-line decoder/demultiplexer in SOP-16 package, operating at 4.75–5.25 V, with propagation delays as low as 13 ns (t_PLH), ±400 µA high-level output drive, and 8 mA low-level sink capability. It serves as a logic-level address decoder in TTL-compatible digital control systems such as industrial I/O expanders and memory-mapped peripheral selection.

For engineers reviewing the 74LS139FPEL-E datasheet, 74LS139FPEL-E pinout, 74LS139FPEL-E application, or 74LS139FPEL-E equivalent, key selection considerations include active-low enable gating, dual independent decode paths, guaranteed operation across –20°C to +75°C, and JEITA-standard SOP-16 (FP-16DAV) mechanical compatibility.

Technical Context

The 74LS139FPEL-E integrates two identical TTL-compatible decoders sharing no internal signal paths-each has dedicated A/B select inputs, active-low G enable, and four active-low Y0–Y3 outputs. Enable inputs double as data lines in demultiplexing mode, allowing single-bit distribution across four channels per section.

Its logic behavior follows standard LS-family DC and AC specifications: VIH ≥ 2.0 V, VIL ≤ 0.8 V, VOH ≥ 2.7 V (at IOH = –400 µA), VOL ≤ 0.4 V (at IOL = 4 mA), and t_PHL/t_PLH ≤ 38 ns under CL = 15 pF, RL = 2 kΩ conditions.

Key Specifications

Pinout & Package

SOP-16 package (JEITA code PRSP0016DH-B, Renesas abbreviation FP-16DAV), 10.06 mm × 7.50 mm body, 1.27 mm pitch, Ni/Pd/Au-plated leads, tape-and-reel packaging (EL: 2,000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 2-to-4 decoder applications.

Compared with SN74LS139DR and 74HCT139PW,118, the 74LS139FPEL-E delivers the fastest propagation delay (13 ns) in its class while maintaining strict Renesas LS-family electrical consistency, making it optimal for timing-critical industrial control decoding where legacy TTL compatibility is mandatory.

Availability

74LS139FPEL-E is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy system memory mapping, and automated test fixture control requiring stable component supply and long-term obsolescence management.

Supply support for 74LS139FPEL-E 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and legacy logic solutions.

The HD74LS139 product line delivers industry-standard TTL-compatible dual decoders targeting backward-compatible upgrades and maintenance of aging industrial, test, and computing equipment.

FAQ

What is the maximum operating temperature range specified for the 74LS139FPEL-E?

The 74LS139FPEL-E is rated for operation from –20°C to +75°C, as confirmed in the Recommended Operating Conditions table of the Renesas HD74LS139 datasheet (Rev. 2.00, Feb. 2005). This range applies specifically to the FP-16DAV SOP-16 variant and is validated under VCC = 4.75–5.25 V and IOL = 4–8 mA load conditions. The 74LS139FPEL-E does not support the extended –40°C to +85°C range found in some competing variants like the TI SN74LS139DR.

Does the 74LS139FPEL-E support demultiplexing functionality, and how is it implemented?

Yes, the 74LS139FPEL-E supports demultiplexing by using its active-low enable inputs (1G and 2G) as data lines. When A and B are held static, asserting 1G low routes the logical state of 1G to the selected Y output (e.g., A=0,B=0 → Y0 follows 1G). This behavior is explicitly documented in the device's functional description and block diagram. Each decoder section operates independently, enabling two concurrent 1:4 demux paths in the 74LS139FPEL-E.

What package type and dimensions does the 74LS139FPEL-E use?

The 74LS139FPEL-E uses the SOP-16 package per JEITA standard PRSP0016DH-B, also designated FP-16DAV by Renesas. Its body measures 10.06 mm × 7.50 mm with 1.27 mm lead pitch, 0.90 mm nominal thickness, and Ni/Pd/Au-plated terminations. The "EL" suffix indicates tape-and-reel packaging with 2,000 units per reel-confirmed in the Ordering Information table of the HD74LS139 datasheet.

Can the 74LS139FPEL-E be used as a direct replacement for the through-hole HD74LS139P DIP-16 version?

No-the 74LS139FPEL-E is not a direct drop-in replacement for the HD74LS139P due to differing packages: SOP-16 versus DIP-16. While both share identical logic function, pin numbering, and electrical specs, their footprints, thermal characteristics, and mounting methods differ. PCB redesign is required to migrate from HD74LS139P to 74LS139FPEL-E. The 74LS139FPEL-E pinout matches the DIP version electrically but requires SMT assembly and reflow profile validation.

What are the absolute maximum ratings for supply voltage and input voltage on the 74LS139FPEL-E?

The 74LS139FPEL-E has an absolute maximum supply voltage (VCC) of 7 V and absolute maximum input voltage (VIN) of 7 V, as stated in the Absolute Maximum Ratings table (page 2 of the HD74LS139 datasheet). Exceeding these values-even momentarily-may cause permanent damage. Operation must remain within the recommended range of 4.75–5.25 V for VCC and –0.5 V to VCC + 0.5 V for VIN to ensure reliability and avoid latch-up in the 74LS139FPEL-E.