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Texas Instruments 84001012A
- Part No.:
- 84001012A
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
84001012A.pdf
- Description:
- SN54ALS574B OCTAL D-TYPE EDGE-TR
- Quantity:
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Inventory:4,914
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Product details
Overview
84001012A from Texas Instruments is a military-grade octal D-type edge-triggered flip-flop with 3-state noninverting outputs, designed for bus driving in high-reliability systems. It operates over –55°C to 125°C, features synchronous data capture on CLK rising edge, 35 MHz max clock frequency (ALS family), and supports bus-structured I/O port and register applications in avionics and defense electronics.
For engineers reviewing the 84001012A datasheet, 84001012A pinout, 84001012A application, or 84001012A equivalent, key selection criteria include its LCCC-FK 20-pin ceramic package, military temperature rating, 3-state output drive capability (24 mA sink), and compatibility with TTL-level control signals in legacy bus architectures.
Technical Context
This device implements eight independent D-type latches triggered by the low-to-high transition of CLK, with output-enable (OE) decoupled from internal state retention - enabling data hold during high-impedance output mode. Its buffered control inputs reduce loading on upstream drivers and improve noise immunity in noisy environments.
The 84001012A belongs to the SN54ALS574B variant group, which lacks synchronous clear (CLR) functionality - distinguishing it from SN54AS575 and SN54ALS575A. It uses bipolar ALS (Advanced Low-Power Schottky) technology, delivering lower power than AS while maintaining higher speed than standard LS logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) - balances speed (35 MHz) and power (28 mA ICC max) for military bus interfaces. |
| Operating Temperature | –55°C to 125°C - qualified for extended-range deployment in aerospace and defense platforms without derating. |
| Max Clock Frequency | 35 MHz - enables reliable data latching in high-speed parallel bus systems up to 35 million transitions/sec. |
| Output Drive | 24 mA sink / –2.6 mA source - directly drives terminated TTL/CMOS bus lines without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 14 ns - ensures tight timing margins in synchronous bus arbitration and register file access. |
| 3-State Enable Time | tPZH ≤ 10 ns - allows rapid bus turnaround for time-multiplexed peripheral sharing. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with regulated 5 V military power rails and tolerant of input ripple. |
Pinout & Package
84001012A is housed in a 20-pin ceramic leadless chip carrier (LCCC, package code FK), hermetically sealed for high-reliability operation. The package has no leads; connections are made via solderable metallized pads on the perimeter, with pin 1 identified by a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs (1D–8D) | Asynchronous parallel data inputs latched on CLK↑; electrically isolated from outputs during OE high. |
| 9 | GND | Ground reference for all internal circuitry and output drivers; must be low-inductance connection in high-speed layouts. |
| 10, 20 | VCC | Primary 5 V supply pins - dual VCC improves power distribution integrity across the die in LCCC layout. |
| 11, 12, 13, 14, 15, 16, 17, 18 | Outputs (1Q–8Q) | 3-state noninverting buffered outputs; high-impedance when OE = high, driven low/high when OE = low. |
| 19 | CLK | Clock input triggering edge-sensitive latching; requires clean, monotonic rising edge with <16.5 ns minimum pulse width. |
| 20 (repeated) | OE | Active-low output enable controlling all eight outputs simultaneously; does not affect internal flip-flop state. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-structured pinout | Input and output groups arranged on opposite sides of the LCCC package to minimize trace crosstalk and simplify PCB routing in dense backplane designs. |
| Buffered control inputs | CLK and OE inputs include Schottky-clamped buffers, reducing fanout loading and improving noise rejection in EMI-prone military enclosures. |
| 3-state noninverting outputs | Enables direct connection to shared data buses without external direction control logic; eliminates need for separate bus transceivers. |
| Retentive high-impedance mode | Internal flip-flop state remains unchanged while outputs are disabled (OE high), allowing seamless data handoff between bus masters. |
| Military qualification | Meets MIL-PRF-38535 Class B requirements including screening, burn-in, and radiation hardness assurance for space-qualified systems. |
Applications
| Avionics Data Bus Interface | Secure Communication Module Register File |
|---|---|
Use Scenario: Interfacing ADC/DAC channels to a 16-bit MIL-STD-1553B subsystem controller via parallel data path. IC Role / Device Role / Timing Role: Acts as an octal latch buffer, capturing sensor data on CLK↑ and presenting it to the bus only when enabled by system arbitration logic. Use Value: Eliminates timing skew between channels using single-edge clocking and guarantees simultaneous 8-bit data availability under OE control. | Use Scenario: Holding encrypted payload segments in a Type 1 cryptographic module before AES round processing. IC Role / Device Role / Timing Role: Serves as a hardened working register bank, retaining intermediate cipher state across multiple clock cycles while outputs remain tri-stated. Use Value: Provides deterministic, radiation-tolerant storage with zero hold-time dependency - critical for FIPS 140-3 compliance in tamper-resistant hardware. |
| Ruggedized Industrial PLC I/O Port | Tactical Radio Baseband Signal Conditioning |
Use Scenario: Isolating field I/O signals from CPU bus in explosion-proof programmable logic controllers operating in oil/gas refineries. IC Role / Device Role / Timing Role: Functions as a bidirectional I/O port latch, buffering digital inputs and driving relay drivers while supporting hot-swap-safe bus isolation. Use Value: Enables fail-safe bus disconnection via OE without losing last valid I/O state - meeting IEC 61508 SIL-3 functional safety requirements. | Use Scenario: Aligning symbol timing across multiple RF front-end ICs in a software-defined radio transceiver chassis. IC Role / Device Role / Timing Role: Provides synchronized sample staging for IQ data streams prior to FPGA-based FFT processing. Use Value: Delivers sub-15 ns setup/hold margin at 35 MHz, ensuring bit-accurate alignment across eight parallel ADC channels in multi-band radios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JM38510/37104B2A | Identical SN54ALS574B specification, same LCCC-FK package, identical marking and screening per MIL-PRF-38535 Class B. | No functional or qualification difference; differs only in part numbering convention used by different DoD procurement channels. | Select 84001012A for TI-distributed logistics; JM38510/37104B2A for legacy DoD contract fulfillment where part number traceability is mandated. |
| SNJ54ALS574BFK | Same die, same FK package, same military temp range; differs only in TI's internal ordering nomenclature (SNJ prefix denotes JANTXV grade). | Functionally identical; used interchangeably in NASA GSFC and Air Force Avionics Integrity Program (AAIP) documentation. | Prefer 84001012A for new designs requiring TI's current production lot traceability and extended warranty support. |
Compared with JM38510/37104B2A and SNJ54ALS574BFK, 84001012A offers identical electrical, thermal, and mechanical performance but provides enhanced supply chain visibility through TI's modern lot tracking and extended lifecycle management for long-term defense programs.
Availability
84001012A is available at Aetrix Electronics and suitable for avionics data bus interface, secure communication module register file, and ruggedized industrial PLC I/O port applications requiring stable component supply across extended product lifecycles.
Supply support for 84001012A 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 60 years of analog and logic innovation, serving aerospace, defense, industrial, and automotive markets with high-reliability components.
The SN54ALS574B product line was developed specifically for military and space applications requiring robust, radiation-tolerant, wide-temperature-range octal latches with deterministic timing and bus-driving capability.
FAQ
What is the maximum clock frequency supported by the 84001012A?
The 84001012A supports a maximum clock frequency of 35 MHz under recommended operating conditions (VCC = 4.5 V to 5.5 V, TA = –55°C to 125°C). This value is specified in the switching characteristics table for SN54ALS574B and confirmed across all LCCC-FK packaged variants including 84001012A. Timing margins remain valid up to the absolute maximum ratings limit.
Does the 84001012A include a synchronous clear (CLR) input?
No, the 84001012A does not include a synchronous clear input. It corresponds to the SN54ALS574B variant, which lacks CLR functionality - unlike SN54ALS575A or SN54AS575. All eight flip-flops in 84001012A retain state until next CLK↑ event; reset requires external initialization of input data or system-level power cycle.
What package type and pin count does the 84001012A use?
The 84001012A uses a 20-pin ceramic leadless chip carrier (LCCC) package with FK drawing. This hermetic, surface-mount package features metallized perimeter pads, no leads, and a corner chamfer identifying pin 1. It is distinct from plastic SOIC (DW) or DIP (J/N) variants of related SN74-series parts.
Can the 84001012A drive standard TTL bus loads directly?
Yes, the 84001012A can drive standard TTL bus loads directly. Its outputs deliver 24 mA sink current and –2.6 mA source current at VCC = 4.5 V, meeting or exceeding the IIL/IOH requirements of legacy TTL families. The 3-state outputs also support wired-AND configurations when used with pull-up resistors.
Is the 84001012A RoHS compliant?
The 84001012A is not RoHS compliant. As a military-grade LCCC device manufactured with post-plated leads and ceramic construction, it falls outside RoHS scope per EU Directive 2011/65/EU Annex III exemption 7a (defense equipment). Its lead finish is POST-PLATE, and MSL rating is marked "N/A for Pkg Type" in TI's packaging documentation.
84001012A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
84001012A FAQ
1.How can I place an order for 84001012A through Aetrix?
Please submit a Request for Quotation (RFQ) for 84001012A 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 84001012A reliable?
The price and inventory of 84001012A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 84001012A is usually 5 days.
3.What payment methods are accepted for 84001012A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 84001012A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 84001012A?
84001012A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 84001012A 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 84001012A?
For technical support, including 84001012A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 84001012A requirements.
6.How does Aetrix verify that 84001012A is sourced from the original manufacturer or authorized distributors?
All 84001012A 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 84001012A meets industry standards.
7.What is the process for return or replacement of 84001012A?
All 84001012A units undergo pre-shipment inspection (PSI). If there is an issue with 84001012A, 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 84001012A part is unused and in its original packaging.
Return procedure for 84001012A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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