74ACT11543DWRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
74ACT11543DWRE4 is an octal registered bus transceiver with 3-state outputs in a 28-pin SOIC package. Supports bidirectional data transfer with independent output enables and a master latch control. From $1.20 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 28
- Lifecycle
- OBSOLETE
- Datasheet
- 74ACT11543DWRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 74ACT11543DWRE4?
- Octal registered bidirectional bus transceiver with independent output enable for each data direction
- Master control latch enables simultaneous transparent-to-register mode switching across all 8 bits
- ACT-family CMOS logic with 3-state outputs rated for ±24 mA drive current in a 28-pin SOIC package
What is 74ACT11543DWRE4 used for?
74ACT11543DWRE4 is used in data bus buffering and isolation applications where bidirectional registered data transfer is required between two board subsystems. It is particularly effective in CPU-to-peripheral bus bridges, backplane bus drivers, and memory interface circuits where independent direction control and 3-state outputs prevent bus contention.
What are the specifications of 74ACT11543DWRE4?
| YTEOL | 0 |
| Additional Feature | INDEPENDENT OUTPUT ENABLE FOR EACH DIRECTION; MASTER CONTROL FOR LATCH |
| Count Direction | BIDIRECTIONAL |
| Family | ACT |
| JESD-30 Code | R-PDSO-G28 |
| Logic IC Type | REGISTERED BUS TRANSCEIVER |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP28,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Propagation Delay (tpd) | 13.2ns |
| 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 | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the 74ACT11543DWRE4 datasheet?
74ACT11543DWRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 74ACT11543DWRE4?
Compatible alternatives and drop-in replacements for 74ACT11543DWRE4:
Bus Transceiver, ACT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO28
Frequently Asked Questions
How does the independent output enable on 74ACT11543DWRE4 differ from a simple bidirectional buffer?
74ACT11543DWRE4 provides separate output-enable pins for each of the two transfer directions, so the A-to-B and B-to-A paths can be independently enabled or tristated. This allows the designer to gate exactly one direction active at a time without external logic, reducing propagation delay by at least 1 gate stage compared to adding discrete enable gates on a simpler 8-bit bidirectional buffer.
What drive strength do the 3-state outputs of 74ACT11543DWRE4 provide for bus loading?
The 3-state outputs of 74ACT11543DWRE4 are rated at ±24 mA sink and source current, enabling it to drive heavily loaded backplane buses with multiple card slots. This drive strength supports bus lines with up to 50 pF load capacitance while still meeting the AC timing specifications of the ACT logic family at 5 V supply.
In which embedded system designs is 74ACT11543DWRE4 preferred over a non-registered transceiver?
74ACT11543DWRE4 is preferred in designs where data must be latched synchronously before being placed onto a shared bus, such as in FPGA-to-memory interfaces, DMA controller outputs, or multi-board backplane systems. The 8-bit registered stage captures data on the clock edge, eliminating glitches on the bus and ensuring setup times of at least 5 ns are met at the receiving device.
What package options and reel availability does 74ACT11543DWRE4 offer for production procurement?
74ACT11543DWRE4 is supplied in a 28-pin SOIC package (300 mil body width) on tape-and-reel with 2500 units per reel, indicated by the 'RE4' suffix. The SOIC-28 footprint with 1.27 mm pitch occupies roughly 18 mm × 7.5 mm of PCB area, making it compatible with standard SMT assembly lines at high volume.
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About Texas Instruments
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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