SN74ALS564BDWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74ALS564BDWG4 is an octal D-type flip-flop bus driver from Texas Instruments, featuring 3-state outputs and active-low output enable for bidirectional bus applications. It belongs to the ALS logic family, rated for 50pF load capacitance in a 20-pin SOIC package with RoHS-compliant construction. Available in stock from global distributors with fast worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ALS564BDWG4 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
- 3-state outputs with active-low enable allow multiple devices to share a common data bus without contention
- ALS (Advanced Low-power Schottky) family delivers improved speed and lower power versus standard LS logic
- Octal (8-bit) width registers an entire byte per clock cycle, simplifying bus interface design
- 50pF rated load capacitance supports driving long PCB traces and backplane bus lines reliably
Applications
The SN74ALS564BDWG4 is commonly used as a data bus buffer and latch in microprocessor systems, memory interface boards, and industrial control backplanes where 8-bit parallel data must be captured and driven onto shared buses. Its 3-state output capability allows clean bus arbitration in multi-master architectures such as VMEbus, ISA, or custom parallel processor buses.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | BROADSIDE VERSION OF 534 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | ALS |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max Frequency@Nom-Sup | 30000000Hz |
| 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 | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 24mA |
| Prop. Delay@Nom-Sup | 14ns |
| Propagation Delay (tpd) | 14ns |
| 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 | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74ALS564BDWG4:
Frequently Asked Questions
What is the function of the SN74ALS564BDWG4?
The SN74ALS564BDWG4 is an octal D-type flip-flop with 3-state outputs, also described as a bus driver. On each clock edge it latches 8 data bits and drives them onto a shared bus, with an active-low output enable pin that disconnects all outputs simultaneously when the bus is owned by another device.
What logic family does the SN74ALS564BDWG4 belong to?
It belongs to the ALS (Advanced Low-power Schottky) logic family, which offers faster propagation delay and lower static power consumption compared to standard LS-TTL devices. This makes ALS parts well suited for bus interface circuits in older embedded systems and industrial controllers where TTL voltage levels are required.
What is the significance of the 3-state outputs on the SN74ALS564BDWG4?
Three-state (tri-state) outputs present a high-impedance state when disabled, effectively disconnecting the device from the bus. This allows multiple SN74ALS564BDWG4 devices to share a single 8-bit parallel bus, with only one device driving at a time based on active-low enable signals from the bus controller.
What package does the SN74ALS564BDWG4 use?
The device is housed in a 20-pin SOIC (Small Outline Integrated Circuit) surface-mount package, JESD-30 code R-PDSO-G20. The SOIC footprint is widely used in industrial and embedded designs, making it compatible with standard automated PCB assembly equipment and straightforward to source from distributors globally.
Is the SN74ALS564BDWG4 RoHS compliant?
Yes, the SN74ALS564BDWG4 is lead-free and RoHS compliant, indicated by its JESD-609 code of e4 and Pb-free marking. This ensures it meets European Union RoHS Directive requirements and is safe for use in consumer electronics and industrial products that must comply with environmental regulations in global markets.
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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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