SN74ACT533DWRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74ACT533DWRE4 is an 8-bit octal transparent D-type latch bus driver from the ACT logic family, with active-low enable, 24 mA output sink current, and 50 pF load capacitance, housed in a 20-pin SOIC package for high-drive bus interfacing.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ACT533DWRE4 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 SN74ACT533DWRE4?
- 8-bit (octal) transparent D-type latch with tri-state outputs
- Active-low output enable for shared bus control
- 24 mA maximum output low sink current for high-drive applications
- ACT family — TTL-compatible inputs with CMOS speed and drive
- 50 pF rated load capacitance per output
- 20-pin SOIC (R-PDSO-G20) SMT package, RoHS Pb-free
What is SN74ACT533DWRE4 used for?
The SN74ACT533DWRE4 is used in microprocessor address and data bus buffering, memory bank selection circuits, and FPGA I/O expansion designs where higher output drive current and TTL-compatible inputs from the ACT family are required. Its 24 mA sink capability and octal transparent latch architecture also make it suitable for industrial motor-control boards and backplane bus drivers where multiple loads must be driven reliably at 5 V.
What are the specifications of SN74ACT533DWRE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | ACT |
| JESD-30 Code | R-PDSO-G20 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 11.5ns |
| Propagation Delay (tpd) | 11.5ns |
| 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 |
| Trigger Type | HIGH LEVEL |
| 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 SN74ACT533DWRE4 datasheet?
SN74ACT533DWRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74ACT533DWRE4?
Compatible alternatives and drop-in replacements for SN74ACT533DWRE4:
Bus Driver, ACT Series, 1-Func, 8-Bit, Inverted Output, CMOS, PDSO20
Frequently Asked Questions
How does the ACT family SN74ACT533DWRE4 differ from the HCT573 in output drive strength?
The SN74ACT533DWRE4 from the ACT logic family sinks up to 24 mA per output, which is four times the 6 mA maximum of the HCT573. This higher drive current makes the ACT533 better suited for bus designs with many parallel loads, longer PCB traces, or heavier pull-up resistors, while still accepting TTL-compatible input levels with the same 50 pF load capacitance rating.
What does the inverted output configuration of the SN74ACT533DWRE4 mean for circuit design compared to the 573?
The 533 topology presents inverted (active-low) outputs relative to the D inputs, meaning a logic high on the input produces a logic low on the output. Designers using the SN74ACT533DWRE4 instead of the non-inverting 573 must account for this inversion in address or data decoding logic, which can simplify active-low memory chip-select or bus control circuits without adding separate inverter stages.
For a 5 V backplane bus application, why would a designer select the SN74ACT533DWRE4 over a standard HC latch?
The ACT family combines TTL-compatible input thresholds (high at 2 V, low at 0.8 V) with CMOS output levels and a robust 24 mA sink drive, making the SN74ACT533DWRE4 ideal for 5 V backplane buses that mix TTL and CMOS cards. Standard HC devices have higher CMOS input thresholds that may not reliably switch from 5 V TTL drivers, whereas the ACT533 interfaces directly without external level-shift components.
Can the SN74ACT533DWRE4 be used in tape-and-reel for automated PCB assembly, and what does the DWR suffix indicate?
Yes, the E4 suffix designates the SN74ACT533DWRE4 as a green (Pb-free) part shipped in tape-and-reel packaging for high-volume SMT assembly. The DWR suffix specifies the wide-body 20-pin SOIC (R-PDSO-G20) body in tape-and-reel format, compatible with standard 12 mm or 16 mm pick-and-place feeders used in automated PCB production lines.
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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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