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Texas Instruments SN74ABT3614-15PCB
- Part No.:
- SN74ABT3614-15PCB
- Manufacturer:
- Texas Instruments
- Category:
- FIFOs Memory
- Package:
- 120-LQFP
- Datasheet:
-
SN74ABT3614-15PCB.pdf
- Description:
- IC FIFO SYNC 64X36X2 120HLQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ABT3614-15PCB from Texas Instruments is a clocked bidirectional FIFO memory IC with two independent 64 × 36 dual-port SRAM buffers, supporting asynchronous or coincident CLKA/CLKB clocks up to 67 MHz, 10 ns read-access time, and dynamic port-B bus sizing (36/18/9 bits) with big-/little-endian selection. It enables high-bandwidth data bridging between mismatched microprocessor buses.
For engineers reviewing the SN74ABT3614-15PCB datasheet, SN74ABT3614-15PCB pinout, SN74ABT3614-15PCB application, or SN74ABT3614-15PCB equivalent, key selection criteria include its dual-clock synchronization architecture, programmable almost-full/empty flags with four offset options, mailbox-bypass register support, passive parity checking per port, and 120-pin thin quad flat (PCB) package compatibility.
Technical Context
The SN74ABT3614-15PCB implements two independent 64 × 36 clocked FIFOs buffering data in opposite directions: FIFO1 accepts writes on Port-A and feeds reads on Port-B; FIFO2 accepts writes on Port-B and feeds reads on Port-A. Each FIFO's full/empty flags are two-stage synchronized to their respective write/read clocks (FFA/EFA to CLKA; FFB/EFB to CLKB), mitigating metastability in asynchronous clock domains.
Port-B supports dynamic bus sizing (36-bit long word, 18-bit word, or 9-bit byte) and three modes of byte-order swapping (no swap, byte swap, word swap, byte-word swap), all selected via SIZ0/SIZ1/BE/SW0/SW1 and latched synchronously to CLKB. Mailbox registers (Mail1/Mail2) provide 36-bit bypass paths with dedicated flag signaling (MBF1/MBF2) for control/command exchange without queuing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width × Ports | 64 × 36 × 2 independent FIFOs - provides 2,304-bit buffer per FIFO, enabling deterministic latency control for burst-mode data transfer. |
| Max Clock Frequency | 67 MHz - supports high-throughput interconnect between fast microprocessors or ASICs without external timing constraints. |
| Read Access Time | 10 ns - ensures minimal latency for real-time read operations in time-critical embedded interfaces. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade industrial and computing applications with stable thermal margins. |
| Bus Sizing Options (Port B) | 36-bit (long word), 18-bit (word), or 9-bit (byte) - allows seamless interfacing with peripherals of varying data widths without glue logic. |
| Parity Support | Passive parity checking + selectable generation per port - enables error detection on both data paths while maintaining flexibility for parity-inclusive or parity-agnostic systems. |
| Flag Synchronization | Two-stage flip-flop sync for EFA/FFA/AEA/AFA (CLKA) and EFB/FFB/AEB/AFB (CLKB) - reduces metastability risk when clocks are asynchronous. |
Pinout & Package
SN74ABT3614-15PCB is housed in a 120-pin thin quad flat package (PCB), with 36-bit bidirectional data ports (A0–A35, B0–B35), dual free-running clocks (CLKA, CLKB), chip selects (CSA, CSB), enable signals (ENA, ENB), read/write controls (W/RA, W/RB), and dedicated flag outputs (EFA, FFA, AFA, AEA, EFB, FFB, AFB, AEB, MBF1, MBF2, PEFA, PEFB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A35 | Port-A bidirectional data bus | 36-bit I/O path for FIFO2 read/write and Mail2 access; high-impedance when CSA or W/RA high. |
| B0–B35 | Port-B bidirectional data bus | 36-bit I/O path for FIFO1 read/write and Mail1 access; bus size dynamically configurable via SIZ0/SIZ1/BE. |
| CLKA / CLKB | Free-running synchronous clocks | Independent clocks for Port-A and Port-B; support asynchronous or coincident operation; all transfers edge-triggered on low-to-high transition. |
| CSA / CSB | Chip select inputs | Enable port activity only when low; disable data outputs and block transfers when high. |
| W/RA / W/RB | Write/read direction control | High = write, low = read; determines data flow direction and output register source per port. |
| EFA, FFA, AFA, AEA | Port-A status flags | Synchronized to CLKA; indicate FIFO2 empty/full/almost-full/almost-empty states for safe read/write coordination. |
| EFB, FFB, AFB, AEB | Port-B status flags | Synchronized to CLKB; indicate FIFO1 empty/full/almost-full/almost-empty states for safe read/write coordination. |
| MBF1 / MBF2 | Mailbox flag outputs | Low indicates pending mail in Mail1/Mail2; high after successful read; prevents overwrites during active mailbox use. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent clock domains | Enables robust bridging between asynchronous subsystems (e.g., CPU ↔ DSP, FPGA ↔ legacy bus) without clock domain crossing logic. |
| Programmable AF/AE offset (4 values) | Allows precise tuning of buffer occupancy thresholds (4, 8, 12, or 16 words) to match system-level flow-control requirements and prevent underflow/overflow. |
| Mailbox-bypass registers | Provides non-queued 36-bit command/control channel between ports, reducing latency for handshake signals or configuration updates. |
| Byte-order swapping (4 modes) | Supports big/little-endian alignment and byte/word reordering on Port-B-critical for interoperability across heterogeneous architectures (ARM/x86/PowerPC). |
| Passive parity with selectable generation | Permits optional end-to-end data integrity verification without requiring external parity logic; parity bits inserted in MSB position per byte group. |
Applications
| Network Interface Bridging | Multi-Processor Communication |
|---|---|
|
Use Scenario: Connecting a 32-bit PCI bus to a 16-bit local bus in a network switch controller. IC Role / Device Role / Timing Role: Bidirectional FIFO buffer with dynamic 32-bit ↔ 16-bit bus matching and byte-swapping to align data endianness across domains. Use Value: Eliminates need for external bus translators or custom logic; maintains deterministic throughput at 67 MHz while handling bursty packet traffic. |
Use Scenario: Interfacing an ARM-based application processor with a C6000 DSP in a radar signal processing module. IC Role / Device Role / Timing Role: Dual-clock FIFO with mailbox registers for low-latency command exchange and buffered data streaming between cores. Use Value: Enables concurrent DMA transfers and interrupt-free control messaging-reducing software overhead and jitter in real-time processing. |
| Industrial PLC Backplane | Legacy System Modernization |
|
Use Scenario: Integrating a modern 36-bit fieldbus controller into a legacy 9-bit sensor interface backplane. IC Role / Device Role / Timing Role: Port-B byte-sized FIFO with big-endian selection and programmable almost-empty flag for sensor data aggregation. Use Value: Allows direct connection to 9-bit analog input modules without bit-banging or FPGA glue logic-cutting BOM cost and design cycle time. |
Use Scenario: Upgrading a 1990s VMEbus-based test equipment system with a new PCIe host controller. IC Role / Device Role / Timing Role: Asynchronous clock-domain bridge with synchronized flags and reset-controlled initialization for reliable power-up sequencing. Use Value: Ensures glitch-free handshaking during hot-swap events and guarantees FIFO pointer consistency after cold start-meeting MIL-STD-810 reliability targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clocked FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT72V2115L15PF | Single 2K × 18 FIFO; no dual-port architecture, no mailbox registers, no byte-swapping; supports 133 MHz but lacks bus-matching features. | Best suited for unidirectional, high-speed streaming where clock domain isolation is less critical than raw bandwidth. | Select IDT72V2115L15PF only when system requires higher clock rate and simpler FIFO topology-avoid if bidirectional bridging or endian conversion is needed. |
| SN74ACT2227DW | 1K × 18 dual-clock FIFO; no dynamic bus sizing, no mailbox bypass, no parity support; max 100 MHz but limited to 18-bit width and fixed endianness. | Applicable for cost-sensitive, space-constrained designs where 18-bit data paths dominate and feature set can be reduced. | Choose SN74ACT2227DW for compact 18-bit bridging with minimal footprint; reject if 36-bit width, byte-swapping, or parity are required. |
Compared with IDT72V2115L15PF and SN74ACT2227DW, SN74ABT3614-15PCB uniquely delivers dual 64×36 FIFOs with integrated bus matching, mailbox registers, and full byte-order flexibility-making it the only option capable of replacing legacy multi-chip FIFO+translator solutions in complex heterogeneous systems.
Availability
SN74ABT3614-15PCB is available at Aetrix Electronics and suitable for network interface bridging, multi-processor communication, industrial PLC backplane integration, legacy system modernization, and high-reliability embedded data buffering requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABT3614-15PCB 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 specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-speed interface and memory products.
The SN74ABT3614-15PCB belongs to TI's advanced BiCMOS FIFO family, designed specifically for high-bandwidth, low-latency data bridging between mismatched synchronous buses in networking, industrial automation, and test equipment.
FAQ
What is the maximum supported clock frequency for SN74ABT3614-15PCB?
The SN74ABT3614-15PCB supports clock frequencies up to 67 MHz on both CLKA and CLKB inputs. This specification is guaranteed across the full commercial temperature range (0°C to 70°C) and defines the upper limit for reliable synchronous data transfer through either port. Exceeding this frequency may result in timing violations or metastability in flag outputs.
Does SN74ABT3614-15PCB support asynchronous clock domains between Port-A and Port-B?
Yes, SN74ABT3614-15PCB explicitly supports asynchronous operation of CLKA and CLKB. Its flags (EFA/FFA/AFA/AEA and EFB/FFB/AFB/AEB) are two-stage synchronized to their respective clocks, minimizing metastability risk. The device functions correctly whether clocks are coincident, phase-shifted, or fully independent-enabling robust bridging between disparate clock domains.
How does the mailbox-bypass functionality work in SN74ABT3614-15PCB?
SN74ABT3614-15PCB includes two 36-bit mailbox registers (Mail1 and Mail2). Writing to Mail1 occurs on CLKB when CSB, W/RB, ENB are active and SIZ0/SIZ1 are high; writing to Mail2 occurs on CLKA when CSA, W/RA, ENA, and MBA are active. Each write sets its corresponding flag (MBF1/MBF2) low; reading clears it. This enables zero-latency command exchange without FIFO queuing delays.
Can SN74ABT3614-15PCB perform byte-order swapping on Port-B for 18-bit word transfers?
Yes, SN74ABT3614-15PCB supports all four byte-swap modes (no swap, byte swap, word swap, byte-word swap) regardless of Port-B bus size. When configured for 18-bit word mode via SIZ0/SIZ1, SW0/SW1 still select the byte ordering applied to the two 9-bit bytes within each 18-bit word-ensuring consistent endianness handling across all supported data widths.
What is the purpose of the ODD/EVEN input on SN74ABT3614-15PCB?
The ODD/EVEN input on SN74ABT3614-15PCB configures parity behavior for both ports: high enables odd parity checking/generation, low enables even parity. It applies to passive parity checking on A0–A35 and B0–B35 inputs, and also determines the type of parity generated by PGA/PGB during read operations-ensuring consistent error-detection policy across the entire data path.
SN74ABT3614-15PCB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 120-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 4.5K (64 x 36 x 2)
- Function:
- Synchronous
- Data Rate:
- 66.7MHz
- Access Time:
- 10ns
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Current - Supply (Max):
- 130mA
- Bus Directional:
- Bi-Directional
- Expansion Type:
- -
- Programmable Flags Support:
- Yes
- Retransmit Capability:
- No
- FWFT Support:
- No
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 120-HLQFP (14x14)
SN74ABT3614-15PCB FAQ
1.How can I place an order for SN74ABT3614-15PCB through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT3614-15PCB 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 SN74ABT3614-15PCB reliable?
The price and inventory of SN74ABT3614-15PCB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT3614-15PCB is usually 5 days.
3.What payment methods are accepted for SN74ABT3614-15PCB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT3614-15PCB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT3614-15PCB?
SN74ABT3614-15PCB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT3614-15PCB 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 SN74ABT3614-15PCB?
For technical support, including SN74ABT3614-15PCB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT3614-15PCB requirements.
6.How does Aetrix verify that SN74ABT3614-15PCB is sourced from the original manufacturer or authorized distributors?
All SN74ABT3614-15PCB 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 SN74ABT3614-15PCB meets industry standards.
7.What is the process for return or replacement of SN74ABT3614-15PCB?
All SN74ABT3614-15PCB units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT3614-15PCB, 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 SN74ABT3614-15PCB part is unused and in its original packaging.
Return procedure for SN74ABT3614-15PCB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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