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Texas Instruments SN54ACT3632HFP
- Part No.:
- SN54ACT3632HFP
- Manufacturer:
- Texas Instruments
- Category:
- FIFOs Memory
- Package:
- 132-CFlatPack
- Datasheet:
-
SN54ACT3632HFP.pdf
- Description:
- IC FIFO SYNC 1KX36 15NS 132CFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN54ACT3632HFP from Texas Instruments is a military-grade, clocked bidirectional FIFO memory IC with two independent 512 × 36 SRAM FIFOs, supporting asynchronous or coincident 50 MHz CLKA/CLKB clocks, 13 ns access time, and mailbox-bypass registers for inter-processor command exchange in avionics data link interfaces.
For engineers reviewing the SN54ACT3632HFP datasheet, SN54ACT3632HFP pinout, SN54ACT3632HFP application, or SN54ACT3632HFP equivalent, key selection criteria include dual-port flag synchronization (IRA/ORA/AFA/AEA vs IRB/ORB/AFB/AEB), programmable almost-full/empty offsets (X1/X2/Y1/Y2), HFP ceramic QFP-132 packaging, and -55°C to +125°C operation for space-qualified systems.
Technical Context
The SN54ACT3632HFP implements two physically separate 512-word × 36-bit synchronous FIFOs with independent clock domains (CLKA/CLKB), each featuring two-stage metastability-hardened flag synchronization and microprocessor-compatible control logic (CSA/CSB, W/RA/W/RB, ENA/ENB). It uses low-power 0.8-µm Advanced CMOS technology and supports up to 50 MHz operation with 13 ns read access time.
Each FIFO includes dedicated input-ready (IRA/IRB) and output-ready (ORA/ORB) flags synchronized to their respective write/read clocks, plus programmable almost-full (AFA/AFB) and almost-empty (AEA/AEB) flags with offset values loaded either via FS0/FS1 during reset or programmed from Port A. Mailbox registers (Mail1/Mail2) enable direct 36-bit register bypass between ports without queuing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth | 512 × 36 × 2 words - Two independent FIFO buffers, each holding 512 36-bit words for full-duplex data staging. |
| Max Clock Frequency | 50 MHz - Enables high-throughput bridging between 50 MHz microprocessors or DSPs without throttling. |
| Access Time | 13 ns - Guarantees sub-20 ns latency for real-time interrupt-driven data transfers in radar processing subsystems. |
| Operating Temperature | –55°C to +125°C - Qualified per MIL-PRF-38535 for deployment in missile guidance, satellite telemetry, and hardened ground stations. |
| Supply Voltage | 5 V ± 5% - Compatible with legacy TTL/CMOS military logic families and eliminates need for level-shifting circuitry. |
| Technology | Low-power 0.8-µm Advanced CMOS - Reduces dynamic power dissipation in thermally constrained airborne enclosures. |
| Package | 132-pin ceramic quad flat package (HFP) - Hermetically sealed, leadless, and qualified for long-term reliability in vacuum and radiation environments. |
Pinout & Package
Packaged in a 132-pin ceramic quad flat package (HFP), the SN54ACT3632HFP features dual 36-bit bidirectional data buses (A0–A35, B0–B35), independent clock/control pairs (CLKA/CLKB, CSA/CSB, W/RA/W/RB, ENA/ENB), synchronized status flags (IRA/ORA/AFA/AEA, IRB/ORB/AFB/AEB), mailbox controls (MBA/MBB, MBF1/MBF2), and dual FIFO reset inputs (RST1/RST2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A35 | Port-A bidirectional data bus | 36-bit interface for read/write operations into FIFO2 or Mail2; high-impedance when CSA or W/RA is inactive. |
| B0–B35 | Port-B bidirectional data bus | 36-bit interface for read/write operations into FIFO1 or Mail1; high-impedance when CSB or W/RB is inactive. |
| CLKA, CLKB | Independent port clocks | Synchronous timing references for FIFO1/FIFO2; support asynchronous or coincident operation up to 50 MHz. |
| IRA, ORA, AFA, AEA | Port-A synchronized flags | All edge-triggered and two-stage synchronized to CLKA; indicate FIFO2 fill status for safe read/write handshaking. |
| IRB, ORB, AFB, AEB | Port-B synchronized flags | All edge-triggered and two-stage synchronized to CLKB; indicate FIFO1 fill status for deterministic inter-port coordination. |
| RST1, RST2 | Dual FIFO reset inputs | Asynchronous active-high resets requiring four CLKA+CLKB transitions; initialize pointers, flags, and load FS0/FS1 offset selections. |
| MBA, MBB | Mailbox select controls | Select between FIFO output register or mailbox register (Mail2/Mail1) on corresponding port data bus. |
| MBF1, MBF2 | Mailbox full flags | Active-low flags indicating pending mail; MBF1 cleared by CLKA write to Mail1, set by CLKB read from Mail1. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent FIFOs | Enables simultaneous bidirectional buffering-e.g., telemetry upload (FIFO1) and command download (FIFO2)-without shared resource contention. |
| Programmable almost-full/empty offsets | X1/X2/Y1/Y2 registers allow runtime tuning of buffer thresholds (1–508 words) to match burst-length requirements in packetized comms protocols. |
| Mailbox-bypass registers | Two 36-bit registers (Mail1/Mail2) provide zero-latency command channel between ports, avoiding FIFO queuing delays for critical control messages. |
| Metastability-hardened flag synchronization | Two-stage flip-flop synchronization on all flags (IRA/ORA/AFA/AEA/IRB/ORB/AFB/AEB) ensures reliable handshaking across asynchronous clock domains. |
| MIL-PRF-38535 compliance | Full characterization over –55°C to +125°C with 100% parametric testing per DESC SMD 5962-9562801QYA for mission-critical aerospace use. |
Applications
| Avionics Data Link Interface | Satellite Telemetry Buffering |
|---|---|
|
Use Scenario: Real-time bidirectional communication between flight computer and RF transceiver in UAV telemetry system. IC Role / Device Role / Timing Role: SN54ACT3632HFP acts as a clock-domain-isolated FIFO bridge, decoupling 40 MHz flight controller bus from 50 MHz S-band modem clock. Use Value: Prevents data loss during clock jitter or phase misalignment; mailbox registers deliver urgent mode-change commands with <10 ns latency. |
Use Scenario: Onboard storage and rate-matching of science instrument data before downlink transmission. IC Role / Device Role / Timing Role: SN54ACT3632HFP serves as dual-port buffer between 25 MHz sensor acquisition interface and 50 MHz X-band transmitter interface. Use Value: Absorbs bursty sensor output (e.g., CCD frame dumps) while sustaining constant downlink rate; programmable AFA/AEB prevents overflow under variable payload loads. |
| Missile Guidance Signal Processing | Hardened Ground Station Interface |
|
Use Scenario: Interfacing radar signal processor (DSP) with inertial navigation unit in tactical missile seeker. IC Role / Device Role / Timing Role: SN54ACT3632HFP provides isolated, radiation-tolerant data path between TI C67x DSP (CLKB) and FPGA-based INS controller (CLKA). Use Value: Dual FIFO architecture eliminates timing skew; mailbox registers deliver real-time course-correction vectors without queuing delay. |
Use Scenario: Secure command-and-control interface between encrypted crypto module and legacy mission computer in nuclear C4I system. IC Role / Device Role / Timing Role: SN54ACT3632HFP functions as tamper-resistant, temperature-stable FIFO buffer between 5 V crypto ASIC and 5 V MIL-STD-1553 bus controller. Use Value: Ceramic HFP package ensures hermetic integrity and thermal stability across desert-to-arctic operational envelopes; MIL-qualified flags prevent metastability-induced command corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clocked bidirectional FIFO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ACT3632HFK | Same die, but packaged in 132-pin ceramic flatpack (HFK); identical electrical specs and timing, differing only in leadframe geometry and thermal resistance. | HFK variant used where board-level reworkability or solder joint fatigue under thermal cycling is prioritized over hermeticity. | Select SNJ54ACT3632HFK if mechanical mounting constraints favor flatpack over quad flat; verify PCB land pattern compatibility before substitution. |
| SN54ACT3632J | Same functionality in 132-pin side-brazed ceramic DIP; higher package inductance limits max clock frequency to 40 MHz (vs 50 MHz for HFP). | J package applied in legacy test fixtures and manual-probe environments where socket compatibility outweighs speed requirements. | Choose SN54ACT3632J only for bench validation or retrofit into existing DIP-based systems; not suitable for new 50 MHz designs. |
Compared with SN54ACT3632HFP, the HFK offers identical performance in a mechanically distinct ceramic package optimized for thermal cycling endurance, while the J variant trades 10 MHz bandwidth for socket-based prototyping flexibility-neither is pin-compatible due to differing footprint geometries.
Availability
SN54ACT3632HFP is available at Aetrix Electronics and suitable for avionics data link interfaces, satellite telemetry buffering, missile guidance signal processing, hardened ground station interfaces, and other high-reliability applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN54ACT3632HFP 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 U.S.-based semiconductor manufacturer specializing in analog, embedded processing, and high-reliability military/aerospace components with over 50 years of defense electronics heritage.
The SN54ACT3632HFP belongs to TI's military-grade clocked FIFO product line, designed specifically for deterministic, radiation-tolerant, multi-clock-domain data buffering in spaceflight, strategic weapons, and secure communications systems.
FAQ
What is the maximum supported clock frequency for SN54ACT3632HFP?
The SN54ACT3632HFP supports clock frequencies up to 50 MHz on both CLKA and CLKB inputs. This specification is guaranteed over the full military temperature range (–55°C to +125°C) and is validated per DESC SMD 5962-9562801QYA. Operation above 50 MHz is not characterized and may result in timing violations or metastability in flag outputs.
How does the mailbox-bypass function work in SN54ACT3632HFP?
In the SN54ACT3632HFP, Mail1 and Mail2 are dedicated 36-bit registers enabling direct inter-port communication without FIFO queuing. Writing to Mail1 occurs on CLKA edge with MBA high; reading from Mail1 occurs on CLKB edge with MBB high. The SN54ACT3632HFP asserts MBF1/MBF2 flags to signal pending mail, ensuring atomic delivery of control words like mode switches or emergency abort commands.
Can SN54ACT3632HFP operate with asynchronous CLKA and CLKB clocks?
Yes, the SN54ACT3632HFP is explicitly designed for asynchronous clock operation: CLKA and CLKB may run at different frequencies, phases, or duty cycles. All flags (IRA/ORA/AFA/AEA and IRB/ORB/AFB/AEB) are two-stage synchronized to their respective clocks, minimizing metastability risk. The SN54ACT3632HFP datasheet confirms this capability in the "Free-Running CLKA and CLKB Can Be Asynchronous or Coincident" feature statement.
What is the purpose of FS0 and FS1 pins on SN54ACT3632HFP?
FS0 and FS1 on the SN54ACT3632HFP select preset offset values (8, 16, or 64) for the almost-full (Y1/Y2) and almost-empty (X1/X2) flag thresholds during FIFO reset. When asserted high during RST1/RST2 rising edge, they load factory-defined offsets; when both are low, the SN54ACT3632HFP enables programming of custom 9-bit offsets (1–508) via Port A writes to FIFO1 after simultaneous reset.
Is SN54ACT3632HFP compliant with MIL-PRF-38535?
Yes, the SN54ACT3632HFP is fully compliant with MIL-PRF-38535 Class K and released under DESC SMD 5962-9562801QYA. It undergoes 100% parametric testing across –55°C to +125°C, including burn-in, radiation hardness assurance (RHA) screening, and hermeticity verification-making it suitable for DoD-critical applications where failure is not an option.
SN54ACT3632HFP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 132-CFlatPack
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 36K (1K x 36)
- Function:
- Synchronous
- Data Rate:
- 50MHz
- Access Time:
- 15ns
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Current - Supply (Max):
- 400µA
- Bus Directional:
- Bi-Directional
- Expansion Type:
- -
- Programmable Flags Support:
- Yes
- Retransmit Capability:
- No
- FWFT Support:
- No
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 132-CFP (24.13x24.13)
SN54ACT3632HFP FAQ
1.How can I place an order for SN54ACT3632HFP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN54ACT3632HFP 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 SN54ACT3632HFP reliable?
The price and inventory of SN54ACT3632HFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN54ACT3632HFP is usually 5 days.
3.What payment methods are accepted for SN54ACT3632HFP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN54ACT3632HFP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN54ACT3632HFP?
SN54ACT3632HFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN54ACT3632HFP 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 SN54ACT3632HFP?
For technical support, including SN54ACT3632HFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN54ACT3632HFP requirements.
6.How does Aetrix verify that SN54ACT3632HFP is sourced from the original manufacturer or authorized distributors?
All SN54ACT3632HFP 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 SN54ACT3632HFP meets industry standards.
7.What is the process for return or replacement of SN54ACT3632HFP?
All SN54ACT3632HFP units undergo pre-shipment inspection (PSI). If there is an issue with SN54ACT3632HFP, 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 SN54ACT3632HFP part is unused and in its original packaging.
Return procedure for SN54ACT3632HFP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN54ACT3632HFP Tags
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