SN5476J Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
SN5476J is a dual JK-type positive-pulse master-slave flip-flop in TTL logic family, housed in a 16-pin ceramic DIP package and rated for operation up to 15 MHz clock frequency. With 15 pF load capacitance and military-grade ceramic packaging, it is used in sequential logic counters, shift registers, and frequency dividers in legacy high-reliability digital systems.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN5476J Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.0000(MOQ 1)
- 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 SN5476J?
- Dual JK master-slave flip-flop with independent J, K, clock, preset, and clear inputs per element
- 15 MHz maximum clock frequency for medium-speed TTL sequential logic applications
- Military-grade 16-pin ceramic DIP package for high-reliability and harsh-environment operation
- TTL/H/L family compatibility enabling direct integration with standard 7400-series logic
- 15 pF load capacitance specification supporting standard TTL bus fanout calculations
- Independent asynchronous preset and clear for flexible initialization in state machines
What is SN5476J used for?
SN5476J is used in military and aerospace digital control systems where ceramic-package TTL flip-flops are required for frequency division, binary counting, and synchronous state machine design at clock rates up to 15 MHz. It serves legacy industrial and defense equipment maintenance requiring drop-in replacements for original 54-series TTL sequential logic components. The device is also employed in radiation-tolerant digital sequencer circuits and test equipment that must operate reliably across extended military temperature ranges with ceramic-package long-term storage stability.
What are the specifications of SN5476J?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | MASTER SLAVE OPERATION |
| Family | TTL/H/L |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | J-K FLIP-FLOP |
| Max Frequency@Nom-Sup | 15000000Hz |
| Max I(ol) | 0.0004A |
| Number of Bits | 2 |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 20mA |
| Prop. Delay@Nom-Sup | 40ns |
| Propagation Delay (tpd) | 40ns |
| Qualification Status | Not Qualified |
| 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 |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 20MHz |
| 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 SN5476J datasheet?
SN5476J Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN5476J?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what maximum clock frequency does SN5476J operate in a TTL sequential counter design?
SN5476J supports a maximum clock frequency of 15 MHz with a 15 pF load capacitance on the outputs, making it suitable for medium-speed binary counters and frequency dividers. At 15 MHz, each master-slave stage completes a full toggle cycle in approximately 67 ns, which aligns with the propagation delay characteristics of the standard TTL 54/74 logic family. Exceeding 15 MHz risks metastable states due to insufficient setup and hold time margins.
Why is the ceramic DIP package of SN5476J preferred over plastic DIP for military and aerospace applications?
The 16-pin ceramic DIP (CDIP) package of SN5476J provides hermetic sealing that prevents moisture ingress, which is critical in military and aerospace environments where humidity, condensation, and salt-fog exposure degrade plastic-encapsulated devices within months. Ceramic packages also offer better thermal conductivity and can withstand temperature cycling from -55°C to +125°C, meeting MIL-STD-883 screening requirements for long-term storage and mission reliability in avionics and defense systems.
How does the master-slave architecture of SN5476J differ from edge-triggered flip-flops in digital system design?
SN5476J uses a master-slave configuration where the master latch captures J and K inputs on the rising clock edge and the slave transfers the state to the outputs on the falling edge, making it a pulse-triggered device sensitive to input changes during the entire high clock phase. Edge-triggered flip-flops sample only at the clock transition, eliminating this sensitivity window. The master-slave design is a legacy TTL characteristic and requires that J and K inputs remain stable for the full clock-high period of at least 25 ns to avoid incorrect state capture.
Can SN5476J interface directly with standard 74LS or 74HC logic family inputs and outputs?
SN5476J is a TTL-family device with output voltage levels (VOH minimum 2.4 V, VOL maximum 0.4 V) compatible with 74LS inputs, which have a VIH threshold of 2.0 V and VIL maximum of 0.8 V. Interfacing with 74HC CMOS requires a pull-up resistor of 1 kΩ to 3.3 V on the TTL output to raise VOH above the 74HC VIH threshold of 3.5 V, since TTL VOH of 2.4 V does not reliably drive CMOS inputs on a 5 V supply without this level-shifting measure.
For a binary ripple counter built from SN5476J flip-flops, how many stages are needed to count to 256?
To count to 256 (2^8), exactly 8 flip-flop stages are needed in a ripple counter configuration, requiring 4 SN5476J devices since each package contains 2 independent JK flip-flops. At 15 MHz input clock frequency, an 8-stage ripple counter divides the clock to produce a 58.6 kHz output at the last stage. Ripple delay accumulates across 8 stages at approximately 15 ns per stage, giving a worst-case total propagation delay of 120 ns from clock input to the MSB output.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $6.0000 | $6.00 |
| 3+ | $5.0000 | $15.00 |
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