CD74HCT259MG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74HCT259MG4 is an 8-bit addressable latch in the high-speed HCT CMOS family, housed in a 16-pin SOIC package. It features a 1:8 demultiplexer followed by a D-latch stage, supporting 50 pF load capacitance and 4 mA output sink current for TTL-compatible control logic. Available in stock worldwide.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HCT259MG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HCT259MG4?
- 8-bit addressable D-latch with integrated 1:8 demultiplexer for efficient parallel data storage and output control in TTL-compatible systems
- HCT CMOS logic family ensures direct interface with 5 V TTL logic levels while consuming significantly lower power than bipolar TTL devices
- 16-pin SOIC package with 50 pF rated load capacitance supports high fan-out applications in industrial and computing control logic designs
What is CD74HCT259MG4 used for?
The CD74HCT259MG4 is used in microcontroller-based systems requiring addressable output expansion, enabling a 3-bit address bus to independently control 8 latched outputs without additional discrete logic. It is well suited for LED display drivers, relay drivers, and parallel I/O port expansion in industrial control panels and embedded systems operating on a 5 V TTL-compatible supply. The device is also used in legacy logic board designs and instrumentation where HCT-family 8-bit addressable latch functionality must interface cleanly with TTL logic signals.
What are the specifications of CD74HCT259MG4?
| YTEOL | 0 |
| Additional Feature | 1:8 DMUX FOLLOWED BY LATCH |
| Family | HCT |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | D LATCH |
| Max I(ol) | 0.004A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 59ns |
| Propagation Delay (tpd) | 57ns |
| 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 | MILITARY |
| 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 | LOW LEVEL |
| 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 |
Where can I find the CD74HCT259MG4 datasheet?
CD74HCT259MG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HCT259MG4?
Compatible alternatives and drop-in replacements for CD74HCT259MG4:
D Latch, HCT Series, 1-Func, Low Level Triggered, 4-Bit, True Output, CMOS, PDSO16
Frequently Asked Questions
How does the CD74HCT259MG4 allow a microcontroller to control 8 outputs using only 3 address lines?
The CD74HCT259MG4 incorporates a 1:8 demultiplexer followed by 8-bit D-latches, allowing a 3-bit binary address to select which of the 8 outputs receives the data input. Each selected latch retains its state independently, so the MCU can set any single output without disturbing the other 7 bits, reducing I/O pin usage significantly in 5 V TTL-compatible control systems.
What load capacitance and output current specs should designers account for when using CD74HCT259MG4?
The CD74HCT259MG4 is characterized at a 50 pF load capacitance per output and provides a maximum output sink current of 4 mA (I(ol) = 0.004 A). Designers should ensure that driven loads such as LED arrays or relay drivers do not exceed these limits without external buffer transistors to maintain signal integrity across all 8 output channels.
When is the CD74HCT259MG4 preferred over a standard HC-family 259 latch in a mixed-logic design?
The CD74HCT259MG4 uses the HCT logic family, which accepts TTL-level input thresholds (V(IH) min = 2.0 V), making it directly interoperable with 5 V TTL logic outputs without level-shifting. Standard HC-family devices require CMOS-level inputs (V(IH) min = 3.5 V at 5 V supply), so the HCT variant is the correct choice when the driving logic is TTL rather than full CMOS swing.
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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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