SN74ACT2235-40PAG Texas Instruments Integrated Circuit (Quad Flat Packages) In Stock
The SN74ACT2235-40PAG is a 1024x9 asynchronous bidirectional FIFO memory IC from Texas Instruments, offering 9216 bits of storage density with 35ns maximum access time and 40ns cycle time in a 64-pin QFPG package. It features bypass transceiver mode, 25MHz maximum clock frequency, and Pb-free RoHS-compliant construction for reliable high-speed data buffering. Available in stock worldwide for bus interface and data buffering applications.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat Packages
- Pin Count
- 64
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ACT2235-40PAG Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1024x9 bidirectional asynchronous FIFO with 9216-bit density and bypass transceiver mode for flexible bus interface buffering
- 35ns maximum access time and 40ns cycle time at 25MHz clock supporting high-speed data transfer between asynchronous systems
- Dual-port bidirectional FIFO architecture enabling simultaneous read and write operations from two independent buses
- RoHS compliant Pb-free design (JESD-609 Code e4) in 64-pin QFPG package for modern high-reliability digital systems
Applications
The SN74ACT2235-40PAG is used in high-speed data buffering applications where two asynchronous buses need to exchange data without synchronization overhead, such as in DSP processor interfaces, DMA controllers, and inter-processor communication systems. Its bidirectional FIFO architecture with bypass transceiver mode is well-suited for bus rate matching and data elasticity in networking equipment, military electronics, and industrial automation controllers. The device also finds application in backplane interfaces and FPGA-to-processor data path bridges where asynchronous first-in first-out buffering is required.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Access Time-Max | 35ns |
| Additional Feature | BYPASS-XCVR |
| Clock Frequency-Max (fCLK) | 25MHz |
| Cycle Time | 40ns |
| JESD-30 Code | S-PQFP-G64 |
| JESD-609 Code | e4 |
| Memory Density | 9216bit |
| Memory IC Type | BI-DIRECTIONAL FIFO |
| Memory Width | 9 |
| Number of Functions | 1 |
| Number of Words | 1024words |
| Number of Words Code | 1000 |
| Operating Mode | ASYNCHRONOUS |
| Organization | 1KX9 |
| Output Characteristics | 3-STATE |
| Output Enable | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TQFP64,.47SQ |
| Package Shape | SQUARE |
| Package Style | FLATPACK, THIN PROFILE, FINE PITCH |
| Parallel/Serial | PARALLEL |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.71 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the memory organization and capacity of the SN74ACT2235-40PAG?
The SN74ACT2235-40PAG is organized as a 1024-word by 9-bit bidirectional FIFO, providing 9216 bits of total memory density. The 9-bit word width accommodates 8 data bits plus a parity bit, which is commonly used in data integrity applications requiring error detection.
What is the access time and clock frequency of the SN74ACT2235-40PAG?
The SN74ACT2235-40PAG has a maximum access time of 35ns and a cycle time of 40ns, supporting a maximum clock frequency of 25MHz. The -40 in the part number indicates the 40ns speed grade, suitable for high-speed asynchronous data buffering between two independent system buses.
What is the bypass transceiver feature in the SN74ACT2235-40PAG?
The bypass transceiver (BYPASS-XCVR) feature allows the SN74ACT2235-40PAG to route data directly from one bus port to the other without storing it in the FIFO. This is useful for testing, diagnostics, or when FIFO buffering is temporarily not required and direct transparent data transfer is preferred.
What package does the SN74ACT2235-40PAG use?
The SN74ACT2235-40PAG is housed in a 64-pin QFPG (Quad Flat Package with Guard ring) surface-mount package, designated S-PQFP-G64. This package provides adequate I/O density for the bidirectional FIFO's dual bus interface and is suitable for high-density PCB assembly.
What applications benefit most from the SN74ACT2235-40PAG?
The SN74ACT2235-40PAG is ideal for applications requiring asynchronous data transfer between two buses running at different speeds or independent clock domains. Typical uses include CPU-to-DSP interfaces, DMA engine buffers, inter-board data paths in VME or PCI systems, and any design requiring elastic buffering of 9-bit wide data words at speeds up to 25MHz.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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