My Inquiry
My Account
Texas Instruments SN74ABT3614-20PQ
.jpg)
- Part No.:
- SN74ABT3614-20PQ
- Manufacturer:
- Texas Instruments
- Category:
- FIFOs Memory
- Package:
- 132-BQFP Bumpered
- Datasheet:
-
SN74ABT3614-20PQ.pdf
- Description:
- IC FIFO SYNC 64X36X2 132BQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,752
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT3614-20PQ from Texas Instruments is a high-speed, low-power BiCMOS bidirectional clocked FIFO memory with two independent 64 × 36 dual-port SRAM buffers operating in opposite directions. It supports up to 67 MHz clock frequency, delivers 10 ns read-access time, and features dynamic port-B bus sizing (36/18/9 bits), big/little-endian selection, and three-mode byte-order swapping - enabling robust data bridging between mismatched microprocessor buses.
For engineers reviewing the SN74ABT3614-20PQ datasheet, SN74ABT3614-20PQ pinout, SN74ABT3614-20PQ application, or SN74ABT3614-20PQ equivalent, this device serves as a synchronous, metastability-hardened interface for inter-processor communication, DMA handshaking, and protocol translation where clock domain crossing, bus-width adaptation, and endian-aware data alignment are critical.
Technical Context
The SN74ABT3614-20PQ implements two independent, clock-synchronized FIFOs (FIFO1 and FIFO2), each with fully programmable almost-full/almost-empty flags synchronized to their respective port clocks (CLKA and CLKB). Its mailbox-bypass registers (Mail1/Mail2) operate independently of FIFO storage and support non-queued command transfer with flag-acknowledged handshaking.
Port-B bus sizing (SIZ0/SIZ1) and byte-swapping (SW0/SW1) are latched on CLKB edges and applied synchronously; parity generation (PGA/PGB) and checking (PEFA/PEFB) operate per-byte across four 9-bit groups, with odd/even mode selected by ODD/EVEN. All status flags undergo two-stage synchronization to suppress metastability during asynchronous clock operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width × Ports | 64 × 36 × 2 independent FIFOs - enables full-duplex buffering of 64 long words per direction without shared resource contention. |
| Max Clock Frequency | 67 MHz - supports high-throughput data streaming between fast microprocessors or ASICs with minimal latency overhead. |
| Read Access Time | 10 ns - guarantees deterministic output registration within one CLKA or CLKB cycle for timing-critical control paths. |
| Bus Sizing Support | 36-bit (long word), 18-bit (word), or 9-bit (byte) on Port B - allows seamless interfacing with peripherals of varying data widths without external glue logic. |
| Endian & Swap Modes | Big/little-endian selectable + four byte-order swap modes (none, byte, word, byte-word) - ensures correct data alignment across heterogeneous architectures. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded systems including industrial controllers and communications backplanes. |
| Technology | Low-power Advanced BiCMOS - balances speed and power efficiency, with typical ICC of 250 mA at 67 MHz. |
Pinout & Package
SN74ABT3614-20PQ uses a 132-pin Quad Flat (PQ) package with 0.8 mm lead pitch, designed for surface-mount assembly on high-density PCBs. Pin numbering follows standard PQ top-view orientation with corner pin #1 marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A35 | Port-A bidirectional data bus | 36-bit I/O path for FIFO2 read/write and Mail2 register 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 register access; bus size dynamically configured via SIZ0/SIZ1. |
| CLKA / CLKB | Free-running port clocks | Independent, asynchronous or coincident clocks; all transfers and flag synchronization referenced to rising edge. |
| CSA / CSB | Port chip select inputs | Enable port activity only when low; disable outputs and ignore clock transitions when high. |
| W/RA / W/RB | Port write/read direction control | High = write to FIFO/mailbox; low = read from FIFO/mailbox; controls A0–A35/B0–B35 driver state. |
| EFA/EFB, FFA/FFB | Synchronized empty/full flags | Two-stage metastability-hardened outputs indicating FIFO emptiness (low) or fullness (low); clocked by CLKA/CLKB respectively. |
| AFA/AFB, AEA/AEB | Programmable almost-full/empty flags | Configurable offset (4/8/12/16 words) set via FS0/FS1 on RST; used for flow control pre-threshold signaling. |
| MBF1 / MBF2 | Mailbox flag outputs | Indicate pending mail: MBF1 low after Mail1 write (CLKB), cleared by Mail1 read; MBF2 low after Mail2 write (CLKA), cleared by Mail2 read. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent FIFO architecture | Enables true bidirectional, non-blocking data flow - e.g., CPU writes to FIFO1 while DMA reads from FIFO2 simultaneously. |
| Dynamic Port-B bus sizing | Eliminates need for external multiplexers or width adapters when connecting to 9-, 18-, or 36-bit peripherals. |
| Configurable byte-order swapping | Supports interoperability between x86 (little-endian) and PowerPC/ARM (big-endian) subsystems without software byte-reordering. |
| Mailbox-bypass registers | Provides low-latency, flag-acknowledged command channel alongside main FIFO data path - essential for initialization and control messaging. |
| Passive parity checking & generation | Per-byte parity (odd/even selectable) on both ports detects transmission errors and supports error-resilient system design. |
Applications
| Microprocessor Bus Bridging | DMA Handshake Coordination |
|---|---|
Use Scenario: Interfacing two microprocessors with different clock domains and bus widths (e.g., 32-bit ARM host to 16-bit DSP slave). IC Role / Device Role / Timing Role: Clocked FIFO acting as asynchronous buffer with dual-port SRAM, providing clock-domain isolation and width adaptation. Use Value: Eliminates external arbitration logic and enables deterministic data transfer rates up to 67 MHz without CPU intervention. |
Use Scenario: Coordinating burst-mode DMA transfers between memory controller and peripheral with variable readiness timing. IC Role / Device Role / Timing Role: FIFO with programmable almost-empty/almost-full flags serving as hardware flow-control interface for DMA request generation. Use Value: Prevents DMA underflow/overflow by triggering requests at precise fill-level thresholds (e.g., 8-word threshold for 64-word depth). |
| Protocol Translation Gateway | Real-Time Control Messaging |
Use Scenario: Converting between legacy 9-bit serial protocol frames and modern 36-bit parallel packet format in industrial gateways. IC Role / Device Role / Timing Role: Bidirectional FIFO with byte-swapping and endian conversion performing real-time data reformatting in hardware. Use Value: Offloads CPU from bit-level manipulation; maintains sub-microsecond latency for time-sensitive fieldbus applications. |
Use Scenario: Exchanging configuration commands and status updates between safety PLC and motion controller over shared backplane. IC Role / Device Role / Timing Role: Mailbox-bypass registers provide dedicated, flag-acknowledged command channel decoupled from main data FIFOs. Use Value: Guarantees priority delivery of control messages with zero FIFO queuing delay and deterministic response timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clocked FIFO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT72V245L15PF | 32 × 18 × 2 FIFO, 15 ns access, 100 MHz max clock, LVDS-compatible I/O, no byte-swapping or mailbox registers. | Lacks bus-matching, endian control, and bypass registers - suitable only for simple width-matched bridging without protocol adaptation. | Choose when higher speed and lower power are required but advanced formatting features are unnecessary. |
| ICS650-03 | 64 × 18 × 2 FIFO, 10 ns access, 66 MHz max clock, supports byte-swapping but no dynamic bus sizing or mailbox registers. | Supports basic endian conversion but cannot adapt to 9-bit or mixed-width peripherals; no dedicated command channel. | Prefer for cost-sensitive designs needing minimal feature set and smaller footprint (100-pin TQFP). |
Compared with IDT72V245L15PF and ICS650-03, the SN74ABT3614-20PQ uniquely integrates bus-matching, multi-mode byte-swapping, and dual mailbox registers - making it the only option among the three capable of full protocol-aware bridging in heterogeneous embedded systems.
Availability
SN74ABT3614-20PQ is available at Aetrix Electronics and suitable for industrial automation interfaces, telecom backplane bridging, and embedded control systems requiring stable component supply across extended production lifecycles.
Supply support for SN74ABT3614-20PQ 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 heritage in high-reliability interface and memory products.
The SN74ABT3614-20PQ belongs to TI's ABT-series advanced BiCMOS FIFO family, engineered specifically for high-speed, low-latency inter-processor communication in commercial and industrial systems demanding clock-domain isolation and flexible data formatting.
FAQ
What is the maximum supported clock frequency for SN74ABT3614-20PQ?
The SN74ABT3614-20PQ 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 reflects the device's BiCMOS process optimization for high-speed synchronous operation without compromising signal integrity or timing margin.
Does SN74ABT3614-20PQ support asynchronous clock domains between Port A and Port B?
Yes, SN74ABT3614-20PQ explicitly supports asynchronous operation: CLKA and CLKB may run at different frequencies, phases, or even be stopped independently. All status flags (EFA/EFB, FFA/FFB, AFA/AFB, AEA/AEB) are two-stage synchronized to their respective port clocks to suppress metastability, ensuring reliable handshaking across clock boundaries.
How does the mailbox-bypass functionality work in SN74ABT3614-20PQ?
The SN74ABT3614-20PQ includes two dedicated 36-bit mailbox registers (Mail1 and Mail2) that operate independently of the FIFOs. Writing to Mail1 is triggered by CLKB when SIZ0/SIZ1 are high; writing to Mail2 is triggered by CLKA when MBA is high. Each write asserts its corresponding flag (MBF1/MBF2), which clears only upon successful read - enabling hardware-acknowledged command exchange.
Can SN74ABT3614-20PQ perform byte-swapping on 18-bit or 9-bit bus configurations?
Yes, SN74ABT3614-20PQ applies byte-order swapping (controlled by SW0/SW1) regardless of Port-B bus size - whether configured for 36-bit long word, 18-bit word, or 9-bit byte transfers. The swap logic operates on the active byte lanes defined by current SIZ0/SIZ1 and BE settings, preserving correct alignment for all supported formats.
What is the purpose of the ODD/EVEN input on SN74ABT3614-20PQ?
The ODD/EVEN input on SN74ABT3614-20PQ selects parity type for both checking and generation functions: high = odd parity, low = even parity. It configures the parity trees used for passive checking on A0–A35 and B0–B35, and determines the parity bit value generated when PGA or PGB is asserted during read operations - supporting system-level error detection consistency.
SN74ABT3614-20PQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 132-BQFP Bumpered
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 4.5K (64 x 36 x 2)
- Function:
- Synchronous
- Data Rate:
- 50MHz
- Access Time:
- 12ns
- 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:
- 132-BQFP (24.13x24.13)
SN74ABT3614-20PQ FAQ
1.How can I place an order for SN74ABT3614-20PQ through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT3614-20PQ 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 SN74ABT3614-20PQ reliable?
The price and inventory of SN74ABT3614-20PQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT3614-20PQ is usually 5 days.
3.What payment methods are accepted for SN74ABT3614-20PQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT3614-20PQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT3614-20PQ?
SN74ABT3614-20PQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT3614-20PQ 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 SN74ABT3614-20PQ?
For technical support, including SN74ABT3614-20PQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT3614-20PQ requirements.
6.How does Aetrix verify that SN74ABT3614-20PQ is sourced from the original manufacturer or authorized distributors?
All SN74ABT3614-20PQ 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 SN74ABT3614-20PQ meets industry standards.
7.What is the process for return or replacement of SN74ABT3614-20PQ?
All SN74ABT3614-20PQ units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT3614-20PQ, 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 SN74ABT3614-20PQ part is unused and in its original packaging.
Return procedure for SN74ABT3614-20PQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT3614-20PQ Tags
-
7201LA15JGI
Renesas
-
7204L12JG
Renesas
-
72V82L15PAG8
Renesas
-
7205L15JGI
Renesas
-
7208L20JG
Renesas
-
72V2105L10PFG
Renesas
-
72V2111L15PFGI
Renesas
-
72V2113L6PFG
Renesas
-
72V36110L6PFG
Renesas
-
SN74ALVC7804-40DL
Texas Instruments
-
7202LA25JGI
Renesas
-
SN74V245-15PAG
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
