SN54ALS33AJ Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The SN54ALS33AJ is a military-grade quad 2-input NOR gate with open-collector outputs from Texas Instruments in a 14-pin ceramic DIP package. Operating from 4.5 V to 5.5 V, it supports wired-AND logic with IOL of 12 mA and is rated from -55°C to 125°C. Ideal for high-reliability defense and aerospace digital systems.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- SN54ALS33AJ 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
Key Features
- Quad 2-input NOR gate with open-collector outputs enabling wired-AND bus structures
- Open-collector IOL of 12 mA for driving indicator LEDs and bus pull-down networks
- ALS (Advanced Low-power Schottky) family for reduced power versus standard TTL
- Military-grade ceramic DIP-14 package rated from -55°C to 125°C
- 4.5 V to 5.5 V supply range with standard TTL-compatible logic levels
Applications
The SN54ALS33AJ is used in military avionics, ground support electronics, and space systems requiring quad NOR gate logic with the flexibility of open-collector outputs. Its wired-AND capability simplifies interrupt collection and bus arbitration circuits in harsh operating environments.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | IOH = 0.1MA @ VOH = 5.5V; IOL = 12MA @ VOL = 0.4V |
| Family | ALS |
| JESD-30 Code | R-GDIP-T14 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | NOR GATE |
| Max I(ol) | 0.0004A |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Output Characteristics | OPEN-COLLECTOR |
| 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) | 9mA |
| Prop. Delay@Nom-Sup | 59ns |
| Propagation Delay (tpd) | 18ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the SN54ALS33AJ and what logic function does it perform?
The SN54ALS33AJ is a military-grade quad 2-input NOR gate IC from Texas Instruments. It contains four independent NOR gates in a single 14-pin ceramic DIP package. Each gate produces a LOW output only when both inputs are LOW, and a HIGH output when either or both inputs are HIGH. The open-collector outputs allow multiple outputs to be wire-ANDed together on a common bus.
What are the operating temperature range and supply voltage specifications for the SN54ALS33AJ?
The SN54ALS33AJ is designed for military and high-reliability applications, operating over an extended temperature range of -55°C to +125°C. The supply voltage range is 4.5 V to 5.5 V (nominally 5 V). These specifications make it suitable for harsh environments such as aerospace, defense, and industrial systems where standard commercial-grade parts would fail.
What makes the SN54ALS33AJ suitable for wired-AND applications, and how should the open-collector outputs be used?
The SN54ALS33AJ features open-collector outputs, which means the output transistor's collector is left unconnected internally. To use the device, an external pull-up resistor must be connected from the output pin to the supply voltage (VCC). This configuration allows multiple open-collector outputs to be tied together on the same node; the node is pulled LOW if any one device asserts a LOW, effectively implementing a wired-AND function. The maximum sink current (IOL) is 12 mA at a VOL of 0.4 V, which should be considered when sizing the pull-up resistor.
In which types of applications is the SN54ALS33AJ typically used?
The SN54ALS33AJ is primarily used in military, aerospace, and high-reliability industrial applications where components must operate reliably across wide temperature extremes and under harsh environmental conditions. Typical applications include logic level conversion, bus control and arbitration circuits, interrupt request (IRQ) lines, and any system where multiple signal sources must be combined using wired-AND logic. Its Advanced Low-power Schottky (ALS) technology also offers improved speed-power performance compared to earlier TTL families.
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About Texas Instruments
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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