74HC590ADWR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The 74HC590ADWR is an 8-bit binary counter with 3-state output registers in a 16-pin SOIC package from the 74HC CMOS logic family. Key specs: 2 V to 6 V supply, separate counter and register clocks, 3-state outputs. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- 74HC590ADWR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 74HC590ADWR?
- 8-bit binary counter with separate output register and 3-state bus-compatible outputs for direct bus interfacing
- Independent counter clock and register clock allowing independent counting and data capture operations
- 74HC CMOS technology operating from 2 V to 6 V supply for broad compatibility with 3.3 V and 5 V systems
- 16-pin SOIC-16 300 mil package with standard surface-mount footprint for automated PCB assembly
What is 74HC590ADWR used for?
The 74HC590ADWR is used in event counting and pulse accumulation circuits where the counted value must be captured and held on a data bus without disturbing the ongoing count. It is well suited for bus-based digital systems, programmable logic interfaces, and frequency measurement circuits requiring 8-bit resolution with 3-state bus output capability.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the 74HC590ADWR datasheet?
74HC590ADWR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 74HC590ADWR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How do the separate counter and register clocks on 74HC590ADWR enable non-destructive data capture?
The 74HC590ADWR has an independent counter clock input (CCKEN) and a register clock (RCKEN), allowing the 8-bit count to be latched into the output register at any time without resetting the counter. This lets the system read a stable 8-bit snapshot while counting continues uninterrupted, which is critical for accurate frequency measurement and event logging applications.
What supply voltage range does 74HC590ADWR support and how does it compare to 74LS equivalents?
The 74HC590ADWR operates from 2 V to 6 V, covering both 3.3 V and 5 V digital systems, while legacy 74LS parts require exactly 5 V. The HC CMOS technology also consumes significantly less quiescent current, typically under 80 µA versus several milliamps for 74LS, making 74HC590ADWR a better fit for battery-powered or low-power digital designs.
For a pulse counting application on a shared 8-bit bus, why is the 3-state output of 74HC590ADWR important?
The 74HC590ADWR 3-state outputs allow multiple devices to share a common 8-bit data bus by tri-stating their outputs when not selected via the output enable pin. This prevents bus contention when up to 8 counter ICs are connected to the same bus, enabling scalable multi-channel counting systems without additional bus buffers.
What are the PCB layout implications of the 16-pin SOIC-16 300 mil package on 74HC590ADWR?
The 74HC590ADWR uses a 16-pin SOIC-16 300 mil wide body with 1.27 mm lead pitch. The package body measures approximately 9.9 mm × 7.5 mm, and designers should place a 100 nF bypass capacitor between VCC and GND pins within 5 mm of the device to suppress CMOS switching transients on the supply rail during output transitions.
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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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