Texas Instruments CD74HCT241EG4

Overview

CD74HCT241EG4 from Texas Instruments is a non-inverting octal buffer/line driver with three-state outputs, featuring one active-high (1OE) and one active-low (2OE) output enable control. It operates at 4.5 V to 5.5 V, delivers ±24 mA output drive, supports –55°C to +125°C industrial temperature range, and exhibits 10 ns typical propagation delay at V_CC = 5 V, C_L = 50 pF - used for bidirectional bus interfacing in microcontroller peripheral expansion and memory address/data latching.

For engineers reviewing the CD74HCT241EG4 datasheet, CD74HCT241EG4 pinout, CD74HCT241EG4 application, or CD74HCT241EG4 equivalent, key selection criteria include its dual-enable logic configuration, LSTTL-compatible input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), high-current bus driving capability, and guaranteed operation across extended temperature extremes without derating.

Technical Context

The CD74HCT241EG4 implements two independent 4-bit non-inverting buffer groups, each controlled by separate output enables: 1OE (active-high) governs Y1–Y4, while 2OE (active-low) governs Y5–Y8. All eight outputs enter high-impedance state only when their respective enable is deasserted - enabling flexible bus arbitration without contention.

Its HCT logic family ensures direct compatibility with legacy TTL signal levels while maintaining CMOS power efficiency. Input leakage remains ≤ ±1 μA at V_CC = 5.5 V, and three-state leakage is specified at ±5 μA over full temperature range, supporting reliable hot-swap and multiplexed bus designs.

Key Specifications

Pinout & Package

CD74HCT241EG4 is supplied in a 20-pin plastic dual in-line package (PDIP), body size 25.40 mm × 6.35 mm, with 2.54 mm lead pitch and through-hole mounting. Pin 10 is GND; pin 20 is V_CC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Compared with SN74HCT241N and 74HCT241D, CD74HCT241EG4 offers identical functionality in a through-hole PDIP package optimized for prototyping, repair, and high-reliability industrial environments where mechanical robustness and thermal margin are prioritized over board area.

Availability

CD74HCT241EG4 is available at Aetrix Electronics and suitable for industrial control systems, aerospace avionics subsystems, and legacy computing hardware restoration requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HCT241EG4 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 global semiconductor leader delivering analog and embedded processing solutions, with over 90 years of innovation in precision logic, power management, and signal chain technologies.

CD74HCT241EG4 belongs to TI's CD74HCT high-speed CMOS logic family, engineered for robust interoperability between TTL and CMOS systems in harsh environments - targeting industrial automation, test equipment, and military-grade electronics.

FAQ

What is the maximum output current per pin for CD74HCT241EG4?

The CD74HCT241EG4 specifies ±24 mA output source/sink current per pin under recommended operating conditions (V_CC = 4.5 V to 5.5 V, T_A = –55°C to +125°C). This rating allows direct driving of 15 LSTTL loads and supports stub-loaded bus topologies without external amplification. Exceeding this value risks parametric shift or latch-up.

Does CD74HCT241EG4 support mixed-voltage interfacing with 3.3 V logic?

Yes, CD74HCT241EG4 accepts 3.3 V CMOS logic levels as valid inputs: V_IH (min) = 2.0 V and V_IL (max) = 0.8 V ensure compatibility with 3.3 V outputs when pulled up to V_CC = 5 V. However, its outputs swing rail-to-rail (0 V to 5 V), so level-shifting is required if interfacing with 3.3 V receivers.

How does the dual output enable (1OE and 2OE) function in CD74HCT241EG4?

In CD74HCT241EG4, 1OE (pin 9) is active-high and controls outputs Y1–Y4, while 2OE (pin 12) is active-low and controls outputs Y5–Y8. Both enables operate independently: Y1–Y4 go high-Z when 1OE = LOW; Y5–Y8 go high-Z when 2OE = HIGH. This allows selective activation of either 4-bit group without affecting the other.

What is the typical propagation delay of CD74HCT241EG4 at 5 V supply?

The typical propagation delay (t_PLH/t_PHL) of CD74HCT241EG4 is 10 ns at V_CC = 5 V, C_L = 50 pF, and T_A = 25°C. Over the full temperature range (–55°C to +125°C), the maximum propagation delay is 38 ns, ensuring timing predictability in thermally demanding applications.

Is CD74HCT241EG4 RoHS compliant?

Yes, CD74HCT241EG4 is RoHS compliant. Per TI's packaging documentation, the "G4" suffix denotes lead-free (Pb-free) construction with NiPdAu (NIPDAU) lead finish, meeting EU Directive 2011/65/EU requirements. The device carries full exemption status for homogeneous material compliance verification.