Texas Instruments 5962-9853001QRA

Overview

5962-9853001QRA from Texas Instruments is a military-grade octal D-type positive-edge-triggered flip-flop with asynchronous clear (CLR), operating from 2 V to 5.5 V, featuring 8 independent D inputs and Q outputs, 5.5-V-tolerant inputs for mixed-voltage interfacing, and –55°C to +125°C operation in CDIP package. It serves as a storage register or synchronous latch in radiation-tolerant control logic for aerospace avionics and defense systems.

For engineers reviewing the 5962-9853001QRA datasheet, 5962-9853001QRA pinout, 5962-9853001QRA application, or 5962-9853001QRA equivalent, this page delivers verified electrical specs, military qualification status, timing parameters at 5 V and 3.3 V, thermal metrics, and direct substitution guidance for QML-38535 Class V applications requiring high-reliability edge-triggered storage.

Technical Context

This device implements eight identical D-type flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input. Each flip-flop transfers data from its D input to corresponding Q output on the rising edge of CLK, provided setup and hold time requirements are met. CLR forces all Q outputs low independently of CLK.

Input voltage tolerance up to 5.5 V enables use as a level translator from 5-V logic into 3.3-V or 2.5-V domains. The device complies with MIL-PRF-38535 Class V requirements, including latch-up immunity >250 mA per JESD17 and ESD protection exceeding 2000-V HBM and 1000-V CDM.

Key Specifications

Pinout & Package

5962-9853001QRA is supplied in a 20-pin Ceramic Dual In-line Package (CDIP-J), body size 24.33 mm × 6.35 mm, with through-hole mounting and hermetic sealing suitable for high-reliability applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop applications.

Compared with SNJ54AHC273FK and 5962-9853001QSA, 5962-9853001QRA offers optimal balance of hermetic sealing, compact CDIP form factor, and proven field reliability in airborne computing - making it the preferred choice for new avionics designs where weight and volume are constrained.

Availability

5962-9853001QRA is available at Aetrix Electronics and suitable for aerospace flight control, secure communications encryption, tactical radar signal processing, and spacecraft command decoding requiring stable component supply across extended product lifecycles.

Supply support for 5962-9853001QRA 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 specializing in analog, embedded processing, and high-reliability components, with over 50 years of heritage in military and space-grade IC development.

The SN54AHC273 product line delivers radiation-tolerant, QML-38535-compliant octal D-type flip-flops designed specifically for mission-critical control logic in defense electronics, launch vehicles, and satellite subsystems.

FAQ

What is the maximum clock frequency supported by 5962-9853001QRA at 5 V supply?

The 5962-9853001QRA supports a maximum clock frequency of 100 MHz when loaded with 50 pF and operated at VCC = 5 V ± 0.5 V, as specified in the Switching Characteristics table. This value reflects guaranteed performance across the full –55°C to +125°C temperature range and accounts for worst-case process, voltage, and temperature (PVT) corners. The 5962-9853001QRA achieves this timing using TI's advanced AHC logic family architecture optimized for speed-power tradeoffs in high-reliability applications.

Does 5962-9853001QRA require external pull-up or pull-down resistors on unused inputs?

Yes - all unused inputs of the 5962-9853001QRA must be tied to either VCC or GND to prevent floating states that could cause excessive current draw or undefined logic behavior. This requirement is explicitly stated in the Recommended Operating Conditions section of the datasheet and applies to all variants of the SN54AHC273 family. Leaving inputs unconnected violates MIL-PRF-38535 design rules and risks latch-up or increased power consumption in the 5962-9853001QRA.

Is 5962-9853001QRA compatible with 3.3-V-only systems?

Yes - the 5962-9853001QRA operates fully within 3.3 V ± 0.3 V supply conditions and maintains guaranteed timing performance down to 2 V. Its 5.5-V-tolerant inputs allow direct connection to 5-V drivers while powered from 3.3 V, enabling seamless integration into mixed-voltage systems without level shifters. The 5962-9853001QRA's electrical characteristics, including VOL ≤ 0.36 V and VOH ≥ 2.48 V at 3.3 V, ensure reliable interfacing with standard 3.3-V CMOS logic families.

What is the thermal resistance (RθJA) of the 5962-9853001QRA in its CDIP package?

The 5962-9853001QRA in CDIP-J package has a junction-to-ambient thermal resistance (RθJA) of 53.9°C/W, as documented in the Thermal Information table for the N package variant. This value assumes standard JEDEC 2S2P test board conditions and reflects the device's ability to dissipate heat in typical through-hole mounted configurations. Engineers should use this RθJA value with the 5962-9853001QRA's maximum power dissipation (ICC × VCC) to calculate worst-case junction temperature under operational load.

How does the clear function operate in 5962-9853001QRA?

The 5962-9853001QRA features an asynchronous active-low clear (CLR) input that forces all eight Q outputs to logic low immediately upon assertion, regardless of clock state or timing. This function operates independently of the clock edge and overrides any data present at the D inputs. The minimum CLR pulse width is 5 ns at 5 V, ensuring reliable reset even in high-speed control sequences. The 5962-9853001QRA's CLR functionality is fully characterized across temperature and voltage ranges per MIL-PRF-38535 requirements.