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Texas Instruments 7801102RA
- Part No.:
- 7801102RA
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
7801102RA.pdf
- Description:
- OCTAL D-TYPE EDGE TRIGGERED FLIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,091
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Product details
Overview
7801102RA from Texas Instruments is a military-grade octal D-type edge-triggered flip-flop IC in CDIP-20 package, featuring 3-state bus-driving outputs, positive-edge clock triggering, and output control (OC) for high-impedance state management. It operates across –55°C to 125°C, supports 5 V supply, delivers 24 mA low-level output drive, and is used in aerospace data latching, avionics bus interfaces, and radiation-tolerant register file design.
For engineers reviewing the 7801102RA datasheet, 7801102RA pinout, 7801102RA application, or 7801102RA equivalent, this device serves as a direct drop-in replacement for SN54LS374J and JM38510/32502BRA in legacy MIL-PRF-38535-compliant systems requiring deterministic timing, bus isolation, and full parallel load capability without external pull-ups.
Technical Context
The 7801102RA implements eight independent D-type flip-flops synchronized on the rising edge of CLK, with asynchronous output enable (OC) controlling all eight 3-state outputs simultaneously. Its TTL-compatible inputs include buffered OC and CLK lines with no hysteresis (unlike 'S-series variants), and P-N-P input structure minimizes DC loading on data buses.
Internal logic retains registered data regardless of OC state-outputs enter high-impedance without affecting latch integrity-enabling dynamic bus sharing and hot-swap-safe I/O port operation. Timing is characterized per MIL-PRF-38535 requirements, with setup time (tsu) of 20 ns and hold time (th) of 5 ns at VCC = 5 V, TA = –55°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Octal positive-edge-triggered D-type flip-flop with 3-state outputs |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V military power rails |
| Output Drive | 24 mA sink current - drives heavy capacitive loads (e.g., backplane buses) without buffers |
| Propagation Delay | 15–28 ns (CLK→Q) - ensures sub-35 MHz synchronous operation in real-time control loops |
| Operating Temperature | –55°C to 125°C - qualified for airborne, space, and ground vehicle environments |
| Package | CDIP-20 (J package) - hermetically sealed ceramic dual in-line, MIL-STD-883 compliant |
| Logic Family | LS-TTL - interoperable with legacy 74LS logic without level-shifting |
Pinout & Package
7801102RA uses a 20-pin Ceramic Dual In-Line Package (CDIP-J) with 0.3-inch body width, through-hole mounting, and hermetic glass-seal construction for moisture resistance and long-term reliability in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OC (Output Control) | Active-low enable for all 3-state outputs; asserts high-impedance when high |
| 2–9 | D1–D8 (Data Inputs) | Asynchronous parallel data inputs latched on CLK rising edge |
| 10 | GND | Signal reference ground terminal |
| 11–18 | Q1–Q8 (Outputs) | Registered outputs with 3-state capability controlled by OC |
| 19 | VCC | Positive supply terminal (4.5–5.5 V) |
| 20 | CLK | Positive-edge clock input - triggers simultaneous capture of all D inputs |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Bus Driving | Enables direct connection to shared data buses without interface components or pull-up resistors |
| Full Parallel Load | All eight bits updated synchronously on one CLK edge - eliminates skew in multi-bit transfers |
| Output Control Independence | OC disables outputs without disturbing internal register state - supports dynamic bus arbitration |
| MIL-PRF-38535 Qualification | Tested across full temperature range with 100% parametric screening - meets Class B reliability standards |
| TTL Input Compatibility | P-N-P input structure reduces input current loading - preserves signal integrity on long trace runs |
Applications
| Aerospace Data Acquisition | Avionics Bus Interface |
|---|---|
|
Use Scenario: Capturing analog-to-digital converter outputs in flight control computers under vibration and thermal cycling. IC Role / Device Role / Timing Role: Edge-triggered register holding sampled sensor data until CPU read cycle begins. Use Value: Deterministic 20 ns setup/5 ns hold timing ensures error-free sampling at 25 MHz bus rates in DO-254-compliant designs. |
Use Scenario: Isolating mission-critical ARINC 429 or MIL-STD-1553B subsystems from shared backplane data lanes. IC Role / Device Role / Timing Role: Bidirectional bus driver with OC-controlled direction switching and glitch-free state transitions. Use Value: 24 mA drive strength and 3-state isolation prevent bus contention during hot-swap maintenance events. |
| Radiation-Hardened Register File | Legacy System Emulation |
|
Use Scenario: Constructing expandable 4-word × 8-bit general-purpose register files in satellite command decoders. IC Role / Device Role / Timing Role: Synchronous storage element in cascaded register banks with common CLK and OC control. Use Value: Hermetic CDIP package and –55°C to 125°C operation sustain functionality in total ionizing dose (TID) > 100 krad environments. |
Use Scenario: Replacing obsolete SN54LS374J in refurbished ground support equipment for Cold War-era radar systems. IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement preserving original PCB layout and firmware timing. Use Value: Identical AC/DC electrical specs and J-package footprint eliminate redesign, requalification, or test fixture changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JM38510/32502BRA | Identical electrical specs, same CDIP-20 package, identical marking and screening level (Class B) | Same MIL-PRF-38535 qualification scope and test flow; differs only in part numbering convention | Select when sourcing from alternate government-approved manufacturers or legacy BOMs referencing MIL-STD-1835B nomenclature |
| SN54LS374J | Same pinout and logic function; commercial screening (non-MIL-PRF-38535), lower temperature range (–55°C to 125°C still met but not tested to spec) | Not approved for flight-critical use; lacks 100% lot acceptance testing per MIL-STD-883 | Acceptable for ground-test or non-safety-critical prototypes where cost or lead time outweighs formal qualification needs |
Compared with JM38510/32502BRA, 7801102RA offers identical performance and qualification but reflects TI's current production nomenclature and traceability; versus SN54LS374J, it provides full MIL-PRF-38535 compliance essential for deployed aerospace hardware.
Availability
7801102RA is available at Aetrix Electronics and suitable for aerospace data acquisition, avionics bus interfacing, and radiation-hardened register file design requiring stable component supply across extended product lifecycles.
Supply support for 7801102RA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader with over 50 years of analog and logic IC innovation, serving defense, space, and industrial markets with high-reliability components.
The 7801102RA belongs to TI's military logic family designed specifically for ruggedized, long-lifecycle applications where interoperability with legacy 74LS systems and compliance with MIL-PRF-38535 are mandatory.
FAQ
What is the exact logic function implemented by the 7801102RA?
The 7801102RA implements eight independent positive-edge-triggered D-type flip-flops with individual D inputs and Q outputs, plus a shared active-low Output Control (OC) pin that places all Q outputs in high-impedance state. It matches the SN54LS374 functional behavior exactly, including propagation delays, setup/hold times, and 3-state control logic as defined in SDLS165B.
Is the 7801102RA pin-compatible with SN54LS374J?
Yes, the 7801102RA is fully pin-compatible with SN54LS374J: both use the CDIP-20 (J) package with identical pin 1–20 assignments, electrical characteristics, and timing parameters. The 7801102RA supersedes SN54LS374J under TI's current military part numbering system while maintaining backward compatibility.
Does the 7801102RA require external pull-up resistors on its outputs?
No, the 7801102RA does not require external pull-up resistors. Its 3-state outputs provide active high- and low-level drive (24 mA sink, 1 mA source) and high-impedance off-state, enabling direct bus connection without passive components-confirmed by TI's "bus-organized system" design guidance in SDLS165B.
What is the maximum operating frequency of the 7801102RA?
The 7801102RA supports a maximum clock frequency of 35 MHz under recommended conditions (VCC = 5 V, CL = 45 pF, RL = 667 Ω), as specified in the 'LS374 switching characteristics table of SDLS165B. This limit applies across its full –55°C to 125°C operating range when loaded per test conditions.
How does the Output Control (OC) pin affect internal register operation in the 7801102RA?
The OC pin in the 7801102RA affects only output drivers-not internal registers. When OC is high, all Q outputs go high-impedance; D inputs remain active, CLK continues to update internal latches, and stored data persists unchanged. This allows safe bus sharing and dynamic enable/disable without disrupting ongoing register operations.
7801102RA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54LS
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 50 MHz
- Max Propagation Delay @ V, Max CL:
- 28ns @ 5V, 45pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 1mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 40 mA
- Input Capacitance:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-CDIP
7801102RA FAQ
1.How can I place an order for 7801102RA through Aetrix?
Please submit a Request for Quotation (RFQ) for 7801102RA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 7801102RA reliable?
The price and inventory of 7801102RA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7801102RA is usually 5 days.
3.What payment methods are accepted for 7801102RA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7801102RA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7801102RA?
7801102RA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7801102RA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 7801102RA?
For technical support, including 7801102RA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7801102RA requirements.
6.How does Aetrix verify that 7801102RA is sourced from the original manufacturer or authorized distributors?
All 7801102RA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 7801102RA meets industry standards.
7.What is the process for return or replacement of 7801102RA?
All 7801102RA units undergo pre-shipment inspection (PSI). If there is an issue with 7801102RA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 7801102RA part is unused and in its original packaging.
Return procedure for 7801102RA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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