Texas Instruments 7604201EA

Overview

7604201EA from Texas Instruments is a dual monostable multivibrator IC in CDIP-16 package, designed for precise pulse generation with independent negative- and positive-edge triggering inputs per channel, 70 ns typical propagation delay (B→Q), 70 µs maximum output pulse width (with R_ext=10 kΩ, C_ext=1 µF), TTL-compatible outputs, and operation across −55°C to +125°C for military-grade timing control in radar interface and avionics subsystems.

For engineers reviewing the 7604201EA datasheet, 7604201EA pinout, 7604201EA application, or 7604201EA equivalent, key selection considerations include its overriding clear functionality, Schmitt-trigger B-input for jitter-free slow-edge triggering down to 1 V/s, external R/C programmability (R_ext: 1.4–70 kΩ, C_ext: 0–1000 µF), ±0.5% unit-to-unit pulse-width variation, and compatibility with SN54LS123/SN74LS123 PCB layouts via R/C value adjustment.

Technical Context

The 7604201EA implements two independent TTL-compatible monostable multivibrators, each with dual trigger inputs (A: negative-transition, B: positive-transition) and an overriding active-low clear. Its internal latching circuitry ensures output stability against V_CC noise (1.5 V typical immunity) and input jitter, while Schmitt-triggered B-input provides hysteresis (V_T+ = 1 V, V_T− = 0.7 V at V_CC = 4.5 V).

Pulse width is defined by t_w ≈ 0.7 × R_ext × C_ext, with timing stability virtually independent of supply voltage and temperature-variation < ±0.5% over V_CC = 4.5–5.5 V and T_A = −55°C to +125°C-making it suitable for high-reliability analog-digital interface timing where external component tolerance dominates total accuracy.

Key Specifications

Pinout & Package

7604201EA is housed in a 16-pin Ceramic Dual In-line Package (CDIP-J) with hermetic sealing and gold-plated leads, rated for −55°C to +125°C operation and compatible with MIL-STD-883 handling and burn-in requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar monostable multivibrator applications.

Compared with SNJ54LS221J and JM38510/31402BEA, 7604201EA delivers identical monostable performance and military temperature operation but offers streamlined procurement via TI's direct military distribution channel with simplified documentation for non-DSCC-mandated programs.

Availability

7604201EA is available at Aetrix Electronics and suitable for radar pulse shaping, avionics watchdog timing, and industrial PLC input conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7604201EA 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 manufacturer specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.

The 7604201EA belongs to TI's military-grade TTL logic family, engineered specifically for timing-critical applications in harsh environments where guaranteed operation from −55°C to +125°C and immunity to supply noise and slow input edges are mandatory.

FAQ

What is the operating temperature range specified for the 7604201EA?

The 7604201EA is rated for operation from −55°C to +125°C, meeting MIL-PRF-38535 Class B environmental requirements. This full military temperature range is validated across all electrical parameters including propagation delay, output drive, and timing accuracy-ensuring reliable function in avionics, ground vehicle, and missile guidance systems without derating.

Does the 7604201EA support retriggering during an active output pulse?

Yes, the 7604201EA supports retriggering: a new trigger on either A or B input during an active output pulse will restart the timing cycle from that instant. This behavior is confirmed in the FUNCTION TABLE and switching waveforms (Figure 1, Condition 1), enabling precise pulse extension in real-time control loops without external logic.

Can the 7604201EA replace SN74LS123 in existing designs?

Yes, the 7604201EA can replace SN74LS123 on a pin-for-pin basis in PCB layouts, as both share identical CDIP-16 pin assignments. However, R_ext/C_ext values must be adjusted per the 7604201EA's timing equation (t_w ≈ 0.7 × R_ext × C_ext) and capacitor polarity reversed-verified in the datasheet's "Pin assignments" note.

What is the minimum input slew rate the 7604201EA B-input can handle reliably?

The B-input of the 7604201EA is a Schmitt trigger with guaranteed jitter-free operation down to 1 V/s input slew rate, as specified in the recommended operating conditions table. This enables direct interfacing with slow-moving sensors, thermocouple amplifiers, or filtered analog comparators without additional conditioning circuitry.

How does the overriding clear function behave relative to the timing cycle in the 7604201EA?

The overriding clear (CLR) input of the 7604201EA forces Q low and Q̅ high immediately upon assertion, terminating any active output pulse regardless of its remaining duration. This asynchronous, priority-clear behavior is documented in the FUNCTION TABLE and Figure 1 (Conditions 3–4), making it suitable for fail-safe system reset where timing predictability must yield to fault response.