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Texas Instruments SNJ54ABT377J
- Part No.:
- SNJ54ABT377J
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
SNJ54ABT377J.pdf
- Description:
- OCTAL EDGE-TRIGGERED D-TYPE FLIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
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Product details
Overview
SNJ54ABT377J from Texas Instruments is a military-grade octal positive-edge-triggered D-type flip-flop with clock enable, operating from –55°C to 125°C. It features 8-bit synchronous storage, high-drive outputs (–32 mA IOH / 64 mA IOL), <1 V output ground bounce at 5 V, and latch-up immunity >500 mA per JESD-17. It is used in military avionics data buffering and radiation-tolerant register staging.
For engineers reviewing the SNJ54ABT377J datasheet, SNJ54ABT377J pinout, SNJ54ABT377J application, or SNJ54ABT377J equivalent, this page delivers verified electrical specs, JEDEC-standard CDIP-20 package details, timing constraints (tsu = 2 ns, th = 1.8 ns), and direct alternatives for high-reliability logic design.
Technical Context
This device implements eight independent D-type latches synchronized to the rising edge of CLK only when CLKEN is low. Its EPIC-IIB BiCMOS architecture combines bipolar speed with CMOS power efficiency, enabling 150 MHz operation while limiting ICC to 30 mA max under full load.
Input thresholds are TTL-compatible (VIH = 2 V, VIL = 0.8 V), and outputs drive ±32 mA/±64 mA loads with VOH ≥ 2.0 V (IOH = –32 mA) and VOL ≤ 0.55 V (IOL = 64 mA). The circuit prevents false triggering via buffered CLKEN gating and internal noise suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal D-type flip-flop with individual D/Q pairs and shared CLK/CLKEN control |
| Operating Temperature | –55°C to 125°C - qualified for full military environmental stress screening |
| Supply Voltage | 4.5 V to 5.5 V - supports stable operation across MIL-STD-704 aircraft bus variations |
| Max Clock Frequency | 150 MHz - enables high-speed data capture in radar pulse processing pipelines |
| Output Drive | –32 mA IOH / +64 mA IOL - directly interfaces with legacy TTL loads without level-shifting |
| Setup/Hold Time | tsu = 2 ns, th = 1.8 ns - permits tight timing closure in synchronous backplane register chains |
| Ground Bounce | VOLP < 1 V at VCC = 5 V - ensures signal integrity during simultaneous switching in dense logic arrays |
Pinout & Package
Ceramic Dual-In-Line Package (CDIP), 20-pin, hermetically sealed, lead finish SNPB, RoHS-exempt, MSL N/A. Designed for high-reliability board mounting with through-hole soldering and conformal coating compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLKEN | Active-low clock enable - disables all flip-flops when high, preventing spurious clocking |
| 2–9 | 1D–8D | Data inputs - each connects to corresponding D input of one flip-flop stage |
| 11–18 | 1Q–8Q | True outputs - each reflects registered state of matching D input on CLK↑ |
| 10 | GND | Digital ground reference - dedicated pin minimizes ground bounce coupling |
| 20 | VCC | Power supply - decoupling required within 10 mm due to high di/dt during switching |
| 19 | CLK | Clock input - edge-triggered on rising transition; internally buffered for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Latch-up immunity | Exceeds 500 mA per JESD-17 - ensures survivability in single-event transient environments |
| ESD protection | 2000 V HBM, 200 V machine model - supports handling in non-classified lab environments |
| Output ground bounce | <1 V at 5 V/25°C - maintains valid logic levels during multi-bit simultaneous switching |
| High-drive capability | –32 mA IOH / +64 mA IOL - eliminates need for external buffer stages in legacy system retrofits |
| State-of-the-art BiCMOS | EPIC-IIB process - achieves 150 MHz speed with sub-30 mA ICC under full load |
Applications
| Avionics Data Buffering | Radar Pulse Register Staging |
|---|---|
|
Use Scenario: Capturing and holding digitized IF samples from phased-array radar receivers before FFT processing. IC Role / Device Role / Timing Role: Synchronous 8-bit register bank providing deterministic latency and jitter-free sampling alignment. Use Value: 2 ns setup time and 150 MHz clock support enable real-time capture at 125 MSPS with zero metastability risk. |
Use Scenario: Staging command words in airborne mission computers where radiation-induced upsets must be mitigated. IC Role / Device Role / Timing Role: Radiation-hardened storage element with latch-up immunity >500 mA for fault-tolerant control path registers. Use Value: Ceramic DIP package and military temperature range ensure operation in jet engine bay thermal transients. |
| Secure Crypto Key Latching | Tactical Radio Baseband Sync |
|
Use Scenario: Holding cryptographic key segments during secure boot sequences in encrypted comms modules. IC Role / Device Role / Timing Role: Tamper-resistant storage register with CLKEN-controlled write gating to prevent side-channel leakage. Use Value: Active-low CLKEN allows precise windowing of key loading cycles, blocking unintended writes during power ramp. |
Use Scenario: Aligning baseband I/Q sample streams across multiple SDR transceivers in distributed antenna systems. IC Role / Device Role / Timing Role: Deterministic delay-matched register stage ensuring sub-nanosecond inter-channel skew control. Use Value: Matched tPLH/tPHL propagation (2.2–7 ns) and 1.8 ns hold time guarantee phase coherence across 8-channel paths. |
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 |
|---|---|---|---|
| SNJ54ABT377FK | LCCC-20 ceramic package; identical electrical specs but different thermal resistance (θJA = N/A vs. CDIP's 67°C/W) | Better high-frequency stability in vibration-prone platforms; requires different PCB land pattern and reflow profile | Select FK for surface-mount integration in space-constrained avionics modules where hermetic sealing and low inductance are critical. |
| 5962-9314801QRA | MIL-PRF-38535 certified version of SNJ54ABT377J; includes additional screening (burn-in, lot acceptance tests) | Required for DoD procurement contracts mandating Class V or Class H reliability assurance | Choose QRA when compliance with MIL-STD-883 methods 1015, 2003, and 2031 is contractually mandated. |
Compared with SNJ54ABT377J, SNJ54ABT377FK offers superior high-frequency mechanical stability but demands redesign of mounting and thermal management, while 5962-9314801QRA adds qualification overhead without altering functional behavior - making SNJ54ABT377J optimal for cost-sensitive, non-certified military upgrades.
Availability
SNJ54ABT377J is available at Aetrix Electronics and suitable for avionics data buffering, radar pulse register staging, and secure crypto key latching requiring stable component supply across extended military lifecycle programs.
Supply support for SNJ54ABT377J 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 founded in 1930, delivering analog and embedded processing solutions for aerospace, defense, industrial, and automotive markets.
SNJ54ABT377J belongs to TI's military logic family designed specifically for high-reliability, radiation-tolerant digital systems operating in extreme thermal and EMI environments.
FAQ
What is the maximum clock frequency supported by SNJ54ABT377J?
The SNJ54ABT377J supports a maximum clock frequency of 150 MHz across its full operating temperature range (–55°C to 125°C), verified under recommended conditions (VCC = 4.5 V to 5.5 V, CL = 50 pF). This rating applies to both data registration and clock-enable gating functions in the SNJ54ABT377J.
Does SNJ54ABT377J require external pull-up resistors on unused inputs?
Yes, SNJ54ABT377J requires all unused inputs-including CLKEN, D inputs, and CLK-to be held statically high or low per Note 3 in the datasheet. Floating inputs may cause excessive ICC, increased noise susceptibility, or unintended clocking in the SNJ54ABT377J.
What is the absolute maximum supply voltage rating for SNJ54ABT377J?
The absolute maximum supply voltage for SNJ54ABT377J is 7 V, as specified in the Absolute Maximum Ratings table. Operation above 5.5 V (recommended max) risks permanent damage, and sustained voltage beyond 7 V violates JEDEC stress limits for the SNJ54ABT377J.
Is SNJ54ABT377J compatible with standard TTL logic levels?
Yes, SNJ54ABT377J accepts TTL-compatible input thresholds: VIH = 2.0 V minimum and VIL = 0.8 V maximum. Its outputs drive standard TTL loads with VOH ≥ 2.0 V (at –32 mA) and VOL ≤ 0.55 V (at +64 mA), ensuring interoperability in mixed-logic systems using SNJ54ABT377J.
What package type does SNJ54ABT377J use, and is it RoHS-compliant?
SNJ54ABT377J uses a ceramic dual-in-line package (CDIP-20) with SNPB (tin-lead) lead finish. It is RoHS-exempt per TI's packaging documentation and intended for military/aerospace applications where leaded finishes are required for solder joint reliability - a defining characteristic of the SNJ54ABT377J.
SNJ54ABT377J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54ABT
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 6.8ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 30 mA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-CDIP
SNJ54ABT377J FAQ
1.How can I place an order for SNJ54ABT377J through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ABT377J 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 SNJ54ABT377J reliable?
The price and inventory of SNJ54ABT377J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ABT377J is usually 5 days.
3.What payment methods are accepted for SNJ54ABT377J?
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4.How is shipping managed for SNJ54ABT377J?
SNJ54ABT377J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54ABT377J 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 SNJ54ABT377J?
For technical support, including SNJ54ABT377J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ABT377J requirements.
6.How does Aetrix verify that SNJ54ABT377J is sourced from the original manufacturer or authorized distributors?
All SNJ54ABT377J 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 SNJ54ABT377J meets industry standards.
7.What is the process for return or replacement of SNJ54ABT377J?
All SNJ54ABT377J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ABT377J, 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 SNJ54ABT377J part is unused and in its original packaging.
Return procedure for SNJ54ABT377J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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