SN74HC563NG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74HC563NG4 is an octal transparent D-type latch with 3-state outputs in a 20-pin DIP package, operating from 2 V to 6 V supply. It features inverting outputs, active-low output enable, and CMOS/TTL-compatible inputs for bus-interface applications. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC563NG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal 8-bit transparent latch with 3-state outputs enables direct connection to 8-bit data buses, simplifying address and data multiplexing in microprocessor designs
- 2 V to 6 V supply range provides compatibility with both 3.3 V and 5 V logic families, easing integration in mixed-voltage systems
- 20-pin DIP package supports breadboard prototyping and through-hole PCB assembly, making it ideal for lab development and legacy industrial equipment
Applications
The SN74HC563NG4 is commonly used in microprocessor and microcontroller designs to demultiplex address/data buses, buffer 8-bit parallel data, and hold register values during bus arbitration. Its 3-state outputs allow multiple latches to share a common bus without contention, which is useful in memory expansion and peripheral interface circuits. The through-hole 20-pin DIP package also makes it a popular choice for educational electronics labs and prototype breadboard systems.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HC563NG4:
Frequently Asked Questions
How does the SN74HC563NG4 differ from the SN74HC563 in a surface-mount package for production PCBs?
The SN74HC563NG4 uses a 20-pin DIP through-hole package with 2.54 mm pin pitch, while SOIC or SSOP variants of the same 74HC563 function occupy roughly 70% less board area. For production PCBs where space and automated assembly matter, the surface-mount version is preferred. The DIP variant remains valuable for breadboard prototyping, through-hole legacy boards, and educational kits where manual insertion is standard practice.
What bus-loading advantage do the 3-state outputs of the SN74HC563NG4 provide in a multi-device system?
When the active-low output-enable pin OE is deasserted high, all 8 output pins enter a high-impedance state and present less than 10 µA leakage current to the bus, allowing up to 8 or more latches to share a common 8-bit data bus without contention. This is critical in microprocessor memory maps where address decoders select only one peripheral at a time, keeping bus capacitance below the 50 pF to 100 pF limit needed for reliable 8 MHz to 16 MHz data transfers.
At what supply voltage does the SN74HC563NG4 achieve its fastest propagation delay?
The 74HC logic family achieves minimum propagation delay at the upper end of its 2 V to 6 V supply range. At 5 V, typical latch-to-output propagation delay is approximately 7 ns to 12 ns, compared to 20 ns to 35 ns at 2 V. Most designs targeting 20 MHz or faster bus cycles should use a 5 V supply to stay within timing budgets, while 3.3 V operation is acceptable for slower 8 MHz to 10 MHz bus interfaces.
Can the SN74HC563NG4 interface directly to 3.3 V microcontrollers while powered at 5 V?
Yes, with attention to the input voltage specification. The 74HC logic threshold at 5 V accepts a logic-high input as low as 3.15 V (0.7 × VCC), so 3.3 V outputs from a microcontroller typically meet this threshold. However, the SN74HC563NG4 outputs at full 5 V swing, so a 5 V output driving a 3.3 V microcontroller input without a level-shifter or voltage divider may exceed the microcontroller's 3.3 V + 0.3 V maximum input rating. A 330 Ω series resistor or a dedicated level-translator IC is recommended for the output path.
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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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