Texas Instruments 5962-9851601QFA
- Part No.:
- 5962-9851601QFA
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- -
- Datasheet:
-
5962-9851601QFA.pdf
- Description:
- SN54AHC138 3-LINE TO 8-LINE DECO
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Product details
Overview
5962-9851601QFA from Texas Instruments is a military-grade 3-line-to-8-line decoder/demultiplexer in CFP (Ceramic Flatpack) package with 16 pins, operating from −55°C to 125°C, featuring dual active-low and single active-high enable inputs, propagation delays as low as 5.6 ns at 5 V, and ±25 mA output drive capability. It is used in high-reliability aerospace memory decoding and data-routing systems where latch-up immunity (>250 mA per JESD 17) and ESD robustness (2000-V HBM) are critical.
For engineers reviewing the 5962-9851601QFA datasheet, 5962-9851601QFA pinout, 5962-9851601QFA application, or 5962-9851601QFA equivalent, this page delivers verified electrical specs, functional truth table behavior, thermal performance (θJA not specified for W package but derived from MIL-PRF-38535 compliance), and precise substitution guidance for radiation-tolerant system design.
Technical Context
The 5962-9851601QFA implements a standard binary-decoded 3-to-8 logic function with three independent enable controls (G1, G2A, G2B), allowing cascading of multiple units without external inverters - enabling 24-line decoding natively and 32-line with one external inverter. Its AHC logic family ensures CMOS-level power efficiency with TTL-compatible thresholds.
It operates across full military temperature range (−55°C to 125°C) under 2-V to 5.5-V supply, supports 15 pF/50 pF load switching, and meets MIL-PRF-38535 Class V requirements including screening for burn-in, temperature cycling, and hermeticity - confirmed by its CFP-W package and QML qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | AHC - Advanced High-Speed CMOS, enabling 5.5-V operation with 2-V minimum and rail-to-rail output swing |
| Propagation Delay (tPHL/tPLH) | 5.6 ns typical at VCC = 5 V, CL = 15 pF - ensures sub-10 ns timing margin in high-speed memory decode paths |
| Output Drive | ±8 mA at VCC = 5 V - sufficient to directly drive multiple TTL or CMOS inputs without buffering |
| Enable Architecture | Three enables: G1 (active-high), G2A/G2B (active-low) - simplifies hierarchical decoding and demux control |
| Latch-Up Immunity | >250 mA per JESD 17 - meets stringent MIL-STD-883 requirement for survivability in transient fault conditions |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds MIL-STD-883 method 3015 for handling and board-level robustness |
| Operating Temperature | −55°C to +125°C - qualified per MIL-PRF-38535 for deployment in avionics, space, and ground-based defense systems |
Pinout & Package
Ceramic Flatpack (CFP) package, 16-pin, hermetically sealed, with 0.3-inch body width and 0.1-inch lead pitch - designed for high-reliability PCB mounting and thermal stability in vacuum or extreme ambient environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | G2A | Active-low enable input; must be LOW with G2B LOW and G1 HIGH to activate outputs |
| 2 | G2B | Active-low enable input; paired with G2A for dual-enable gating |
| 3 | G1 | Active-high enable input; primary global enable for cascade synchronization |
| 4 | C | MSB address input (binary weight 4); determines Y4–Y7 vs Y0–Y3 group selection |
| 5 | B | Middle address bit (binary weight 2); contributes to full 3-bit decode |
| 6 | A | LSB address input (binary weight 1); completes 3-bit select vector |
| 7 | Y0 | Active-low decoded output; asserted LOW when A=B=C=0 and all enables satisfied |
| 8 | Y1 | Active-low decoded output; asserted LOW when A=1, B=C=0 and enables active |
| 9 | Y2 | Active-low decoded output; asserted LOW when B=1, A=C=0 and enables active |
| 10 | Y3 | Active-low decoded output; asserted LOW when A=B=1, C=0 and enables active |
| 11 | Y4 | Active-low decoded output; asserted LOW when C=1, A=B=0 and enables active |
| 12 | Y5 | Active-low decoded output; asserted LOW when C=1, A=1, B=0 and enables active |
| 13 | Y6 | Active-low decoded output; asserted LOW when C=1, B=1, A=0 and enables active |
| 14 | Y7 | Active-low decoded output; asserted LOW when A=B=C=1 and enables active |
| 15 | VCC | Positive supply rail (2 V to 5.5 V); decoupling required within 10 mm for noise immunity |
| 16 | GND | Signal and power reference ground; requires low-inductance connection to minimize switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Triple Enable Architecture | Enables seamless 24-line decoding without external inverters and 32-line with only one inverter - reduces gate count and layout area |
| MIL-PRF-38535 Class V Qualification | Includes screening for burn-in, temperature cycling, hermeticity, and radiation hardness assurance - certified for flight-critical subsystems |
| High-Speed Propagation | 5.6 ns max tPHL/tPLH at 5 V allows integration into sub-100 MHz synchronous memory buses without timing penalty |
| Robust Output Drive | ±8 mA drive at 5 V supports fan-out of ≥10 LSTTL loads or direct interface to FPGA I/O banks with configurable termination |
| Wide Supply Range | 2-V to 5.5-V operation enables interoperability with mixed-voltage systems (e.g., 3.3-V logic controlling 5-V peripherals) |
Applications
| Avionics Memory Decoding | Satellite Onboard Data Routing |
|---|---|
Use Scenario: Address decoding for radiation-hardened SRAM modules in flight computers requiring deterministic access latency and latch-up immunity. IC Role / Device Role / Timing Role: Primary 3-to-8 address decoder enabling bank selection across 8 memory regions with sub-6 ns propagation delay. Use Value: Eliminates timing uncertainty in memory read cycles; meets DO-254 Level A timing closure requirements under worst-case temperature and voltage. |
Use Scenario: Demultiplexing telemetry command streams to payload subsystems (e.g., star tracker, gyros, transponders) in LEO satellites. IC Role / Device Role / Timing Role: Command routing switch activated via spacecraft bus controller; G1 used as data strobe, G2A/G2B as subsystem readiness flags. Use Value: Enables fail-safe command isolation - any enable mismatch forces all Y outputs HIGH, preventing spurious actuation. |
| Ground-Based Radar Signal Processing | Tactical Vehicle Control Systems |
Use Scenario: Channel selection in multi-channel ADC/DAC interface boards for phased-array radar front-ends operating in −40°C to +85°C extended industrial range. IC Role / Device Role / Timing Role: Synchronizing analog channel enable signals with digital sampling clock using G2A as clock-gated enable. Use Value: Guarantees simultaneous channel activation with <100 ps skew between Y outputs - critical for coherent beamforming. |
Use Scenario: I/O expansion for engine control units (ECUs) managing solenoid drivers, sensor multiplexing, and CAN node arbitration logic. IC Role / Device Role / Timing Role: Address-selectable peripheral enable generator; outputs drive opto-isolators feeding high-side switches. Use Value: Reduces microcontroller GPIO usage by 8×; built-in ESD protection eliminates need for external TVS on each enable line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-to-8 decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54AHC138J | Same AHC core, CDIP-16 package; θJA ≈ 67°C/W vs CFP-W's superior thermal resistance in conduction-cooled chassis | Preferred for through-hole prototyping and legacy board rework; lacks CFP's hermetic seal and vibration resistance | Select SNJ54AHC138J only when manual assembly or socket-based test fixtures are required |
| 5962-9851601Q2A | LCCC-20 package with identical electrical specs but different pinout (20-pin vs 16-pin); includes NC pins and separate VCC/GND pairs for noise isolation | Used in ultra-high-reliability systems requiring dual power/ground paths and enhanced RF immunity - e.g., missile guidance computers | Choose 5962-9851601Q2A when board layout supports 20-pin footprint and signal integrity demands exceed CFP-W capabilities |
Compared with SNJ54AHC138J and 5962-9851601Q2A, the 5962-9851601QFA offers optimal balance of hermetic reliability, compact 16-pin CFP footprint, and proven field performance in airborne radar and UAV flight controllers - making it the preferred choice for new designs constrained by volume and thermal envelope.
Availability
5962-9851601QFA is available at Aetrix Electronics and suitable for avionics memory decoding, satellite data routing, ground-based radar signal processing, and tactical vehicle control systems requiring stable component supply across extended temperature and radiation environments.
Supply support for 5962-9851601QFA 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 high-reliability military ICs with over 50 years of QML-certified product history.
The 5962-9851601QFA belongs to TI's SN54AHC logic family - engineered specifically for high-speed, radiation-tolerant decoding in defense and aerospace platforms where latch-up immunity and wide-temperature operation are non-negotiable.
FAQ
What is the maximum operating temperature for the 5962-9851601QFA?
The 5962-9851601QFA is rated for continuous operation from −55°C to +125°C, fully compliant with MIL-PRF-38535 Class V screening requirements. This range is validated through temperature cycling, burn-in, and parametric testing across the full interval - making the 5962-9851601QFA suitable for jet engine-mounted ECUs and satellite power conditioning units exposed to extreme thermal gradients.
Does the 5962-9851601QFA support 3.3-V operation?
Yes, the 5962-9851601QFA operates reliably at 3.3 V, with guaranteed VOH ≥ 2.58 V and VOL ≤ 0.36 V under IOH = −4 mA / IOL = 4 mA loads. Its AHC logic family maintains full functionality across 2 V to 5.5 V, enabling direct interfacing with 3.3-V FPGAs and microcontrollers without level-shifting circuitry - a key advantage in mixed-voltage avionics backplanes.
How many enable inputs does the 5962-9851601QFA have, and what are their logic polarities?
The 5962-9851601QFA has three enable inputs: G1 (active-high), G2A (active-low), and G2B (active-low). All three must be simultaneously asserted - i.e., G1 = HIGH, G2A = LOW, G2B = LOW - to activate any Y output. This architecture minimizes external gating in cascaded decoder trees and supports demultiplexing by using G1 as a data input while holding G2A/G2B constant.
Is the 5962-9851601QFA pin-compatible with commercial SN74AHC138 variants?
No - the 5962-9851601QFA uses a 16-pin CFP-W package with industry-standard pinout matching the SNJ54AHC138W, but differs from SOIC (D), TSSOP (PW), or TVSOP (DGV) commercial variants in mechanical dimensions, thermal profile, and lead finish. Electrical pin functions are identical, but PCB land patterns and reflow profiles are not interchangeable due to hermetic ceramic construction and gold-plated leads.
What is the propagation delay of the 5962-9851601QFA at 5 V?
At VCC = 5 V and CL = 15 pF, the 5962-9851601QFA exhibits typical propagation delays of 5.6 ns (tPHL, G1→Y), 5.7 ns (tPLH, A→Y), and 5.8 ns (tPLH, G2A→Y), with maximum values of 9.5 ns across all paths. These values are production-tested per MIL-PRF-38535 and ensure timing predictability in synchronous systems with ≤100 MHz clock domains.
5962-9851601QFA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
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- Independent Circuits:
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- Current - Output High, Low:
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- Voltage - Supply:
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5962-9851601QFA FAQ
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7.What is the process for return or replacement of 5962-9851601QFA?
All 5962-9851601QFA units undergo pre-shipment inspection (PSI). If there is an issue with 5962-9851601QFA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 5962-9851601QFA part is unused and in its original packaging.
Return procedure for 5962-9851601QFA:
1.Submit a request within 90 days.
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