SNJ54AHCT125J Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The SNJ54AHCT125J is a quad 3-state bus buffer with active-low output enable in the AHCT logic family, housed in a 14-pin ceramic DIP package. It accepts 5 V TTL-compatible inputs while driving 3-state CMOS outputs at 8 mA sink current across the military -55°C to 125°C temperature range.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- SNJ54AHCT125J Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SNJ54AHCT125J?
- Military-grade ceramic DIP-14 package rated -55°C to 125°C for aerospace and defense bus interface applications
- AHCT logic family accepts 5 V TTL input levels while driving CMOS-compatible outputs, bridging TTL-to-CMOS logic level translation
- Active-low enable control on all 4 channels allows 3-state bus sharing with multiple drivers without contention
What is SNJ54AHCT125J used for?
The SNJ54AHCT125J is designed for military and aerospace digital systems requiring reliable bus buffering across the full -55°C to 125°C temperature range. Its quad 3-state outputs enable data bus expansion and direction control in avionics, space electronics, and mil-spec computing modules where ceramic DIP packaging provides superior moisture resistance. The AHCT family TTL-input compatibility facilitates mixed-logic interface between legacy 5 V TTL backplanes and newer CMOS subsystems in ruggedized military equipment.
What are the specifications of SNJ54AHCT125J?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | AHCT/VHCT/VT |
| JESD-30 Code | R-GDIP-T14 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.008A |
| Number of Bits | 1 |
| Number of Functions | 4 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP14,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.02mA |
| Prop. Delay@Nom-Sup | 8.5ns |
| Propagation Delay (tpd) | 8.5ns |
| Qualification Status | Not Qualified |
| Screening Level | MIL-PRF-38535 |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the SNJ54AHCT125J datasheet?
SNJ54AHCT125J Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SNJ54AHCT125J?
Compatible alternatives and drop-in replacements for SNJ54AHCT125J:
Bus Driver, AHCT/VHCT/VT Series, 4-Func, 1-Bit, True Output, CMOS, PDIP14
Frequently Asked Questions
What temperature range does SNJ54AHCT125J support and why does it matter for aerospace bus interfaces?
SNJ54AHCT125J is rated for -55°C to 125°C operation in the SNJ54 military temperature grade, enabling reliable bus buffering in avionics black boxes, satellite control electronics, and mil-spec ground support equipment that experience extreme thermal cycling. The ceramic DIP-14 package provides hermetic sealing that prevents moisture-induced failures in humid or high-altitude environments.
How does SNJ54AHCT125J bridge TTL and CMOS logic levels in a mixed-logic backplane design?
SNJ54AHCT125J accepts TTL logic levels with VIH minimum of 2.0 V and VIL maximum of 0.8 V on its inputs, while driving CMOS-compatible output levels. This allows 5 V TTL bus signals from legacy devices to interface with modern 3.3 V or 5 V CMOS logic without level-shifting ICs, simplifying backplane design in military communication systems with mixed-generation logic families.
How many 3-state output channels does SNJ54AHCT125J provide and how are they controlled?
SNJ54AHCT125J provides 4 independent 3-state output channels, each controlled by an active-low output enable pin. When any enable is deasserted high, the corresponding output enters a high-impedance state, allowing multiple bus drivers to share a 14-bit or wider data bus without logic contention. Each output can sink up to 8 mA in the active state with 50 pF load capacitance.
For a space-grade digital control board, when is SNJ54AHCT125J preferred over commercial-grade SN74AHCT125?
SNJ54AHCT125J is required when specifications demand operation below -40°C or above 85°C, reaching -55°C to 125°C, and where ceramic DIP packaging provides radiation and moisture tolerance beyond plastic SOIC limits. Military procurement programs specifying MIL-PRF-38535 Class B or higher qualify SNJ54-prefix devices, making SNJ54AHCT125J necessary in mission-critical avionics and satellite systems that SN74-prefix commercial parts cannot fulfill.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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