8550701RA Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The 8550701RA is a D-type bus-interface flip-flop from Texas Instruments in the HCT logic family, featuring a single element with positive-edge triggering, active-low 3-state output enable, and a 20 MHz maximum toggle frequency at 50 pF load. It is housed in a 20-pin ceramic DIP (CDIP) tube package for high-reliability applications.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- 8550701RA 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 8550701RA?
- Single D-type positive-edge-triggered flip-flop with 3-state bus-interface output, active-LOW enable control
- HCT family logic compatible with 5 V TTL thresholds and up to 20 MHz maximum operating frequency at 50 pF load
- 20-pin ceramic dual-in-line (CDIP) package with JESD-609 e0 RoHS compliant finish for military and industrial reliability
- Unidirectional bus-driver architecture simplifies address or data latch design in 8-bit and wider backplane systems
What is 8550701RA used for?
The 8550701RA is designed for address and data latching on high-reliability 5 V TTL-compatible bus systems in military avionics, defense electronics, and ruggedized industrial controllers where the ceramic hermetic CDIP package is mandatory. Its 3-state output and active-low enable make it a direct fit for bus arbitration circuits, memory address registers, and backplane interface stages running at up to 20 MHz clock rates.
What are the specifications of 8550701RA?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | HCT |
| JESD-30 Code | R-GDIP-T20 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max Frequency@Nom-Sup | 20000000Hz |
| Max I(ol) | 0.006A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 54ns |
| Propagation Delay (tpd) | 54ns |
| Qualification Status | Qualified |
| Screening Level | MIL-STD-883 |
| 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 | 8542.39.00.60 |
| Country of Origin | USA |
Where can I find the 8550701RA datasheet?
8550701RA Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 8550701RA?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what maximum clock frequency can the 8550701RA reliably toggle its output on a 50 pF load?
The 8550701RA is rated for a maximum frequency of 20 MHz when driving a 50 pF load capacitance. At this rate, the HCT-family output can switch a full logic level within half a clock period (25 ns), meeting setup and hold requirements of most 5 V TTL-compatible bus controllers in address-latch applications.
How does the 8550701RA's 3-state output simplify multi-device bus sharing on a common data or address bus?
The active-LOW output enable (OE#) places all outputs in high-impedance when asserted, allowing multiple 8550701RA devices to share a single 8-bit or 20-bit address bus without bus contention. Each device drives the bus only during its assigned time slot, and the 20-pin CDIP footprint lets designers stack several units in a DIP socket array on a standard 0.1-inch-pitch PCB.
Why is the ceramic DIP package of the 8550701RA preferred over a plastic SOIC in defense or avionics applications?
The 20-pin ceramic DIP (JESD-30 code R-GDIP-T20) provides a hermetically sealed cavity that prevents moisture ingress under MIL-STD-883 screening conditions, whereas plastic SOIC packages absorb moisture and can delaminate during solder reflow at high temperatures. For flight hardware or equipment rated to extended temperature ranges beyond −40°C to +85°C, the ceramic package sustains flip-flop timing parameters—20 MHz max frequency, 50 pF load—across the full operational life.
When would a designer choose the 8550701RA over a modern CMOS LVC or ALVC flip-flop for a legacy bus refresh?
In 5 V TTL backplane systems already populated with HCT-family logic running at 20 MHz or below, the 8550701RA offers direct pin-for-pin and voltage-level compatibility without the level-translation overhead required by 1.8 V or 2.5 V ALVC parts. The CDIP tube packaging also meets traceability and screening requirements for MIL-spec procurement that plastic SOIC alternatives cannot satisfy.
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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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