7801201RA Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
Texas Instruments 7801201RA is an 8-channel inverting 3-state bus driver in the TTL LS logic family, housed in a 20-pin ceramic DIP package rated for high-reliability applications. Features active-low output enable control with 45 pF load capacitance and 24 mA sink current capability. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- 7801201RA 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 7801201RA?
- 8-channel inverting 3-state outputs allowing bidirectional bus sharing among multiple devices with a single enable-low pin
- TTL LS family bipolar technology delivering 24 mA output sink current for driving bus loads in legacy 5 V digital systems
- Ceramic DIP-20 package with hermetic sealing meeting MIL-STD-883 and extended temperature requirements
- 45 pF characterized load capacitance maintaining propagation delay integrity across fully loaded backplane bus designs
What is 7801201RA used for?
The 7801201RA is used in military, aerospace, and high-reliability industrial digital systems requiring an 8-bit inverting bus driver that can withstand harsh environmental conditions. As part of the TTL LS logic family, it interfaces directly with 5 V microprocessors and memory buses in legacy systems where ceramic packaging is mandated for long-term reliability. Test equipment, avionics computers, and ruggedized embedded controllers use this device for reliable 3-state data bus management with guaranteed output drive strength.
What are the specifications of 7801201RA?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | LS |
| JESD-30 Code | R-GDIP-T20 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 45pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 4 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| 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) | 50mA |
| Prop. Delay@Nom-Sup | 18ns |
| Propagation Delay (tpd) | 18ns |
| 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 | 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 | 8542.39.00.60 |
| Country of Origin | USA |
Where can I find the 7801201RA datasheet?
7801201RA Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 7801201RA?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Why is the ceramic DIP package of the 7801201RA required in military and aerospace applications?
Ceramic packaging provides hermetic sealing that prevents moisture ingress, which is critical for long-term reliability in environments exposed to temperature cycling, humidity, and altitude. Military avionics and space systems mandate ceramic packages over plastic because they maintain seal integrity for 20 or more years and pass MIL-STD-883 screening requirements.
What output sink current does the 7801201RA support and which bus loads does that drive?
The device sinks up to 24 mA per channel in the low state, which is sufficient to drive standard TTL loads of 16 mA with margin or to pull down 50-ohm terminated backplane stubs in military bus architectures. This current rating is consistent with the LS family specification and matches the input threshold requirements of standard 74LS or 74S logic families.
How does the active-low output enable of the 7801201RA control bus access across multiple drivers?
When the active-low enable pin is pulled high, all 8 output channels enter a high-impedance 3-state mode, disconnecting the driver from the shared bus. This allows multiple 7801201RA devices to multiplex data onto a common 8-bit bus without contention, provided only one device's enable is asserted low at any given clock cycle.
For a legacy 8-bit backplane with 45 pF bus capacitance, how does the 7801201RA maintain signal integrity?
The device is characterized at 45 pF load capacitance, which corresponds to typical backplane trace and receiver input capacitances in 5 V TTL bus designs. At this load the LS family guarantees propagation delays under 15 ns, preserving adequate setup and hold margins for data valid on both rising and falling clock edges of processors clocked at 10 MHz to 25 MHz.
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Why Buy from FindMyChip
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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