CD74HC259E Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments CD74HC259E is an 8-bit addressable latch with 1-to-8 demultiplexer in a 16-pin DIP package. Key specs: HC CMOS family, 2 V to 6 V supply, 8 latched outputs with 5.2 mA sink capability and 50 pF load tolerance. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC259E 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
Key Features
- 8-bit addressable D-latch with integrated 1:8 demultiplexer reducing output port expansion to a single IC
- HC CMOS family operating from 2 V to 6 V with 5.2 mA output sink current per channel
- 16-pin DIP through-hole package for easy breadboard prototyping and robust industrial panel PCB assembly
Applications
The CD74HC259E is used in microcontroller output expansion circuits where a single 3-bit address bus can drive 8 independently latched GPIO lines without consuming additional MCU pins. Its 1:8 demultiplexer architecture suits relay driver boards, LED matrix control, and PLC output modules that require deterministic latch hold while the CPU services other tasks. Operating on supplies between 2 V and 6 V, it interfaces directly with both 3.3 V and 5 V logic families in mixed-voltage industrial control panels.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | 1:8 DMUX FOLLOWED BY LATCH |
| Family | HC/UH |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | D LATCH |
| Max I(ol) | 0.0052A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 28ns |
| Propagation Delay (tpd) | 255ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | LOW LEVEL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia, Mexico |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many output lines can CD74HC259E control, and what is the maximum sink current per output?
The CD74HC259E provides 8 independently addressable latched output lines, each capable of sinking up to 5.2 mA. This is sufficient to directly drive standard LEDs through a 270 Ω current-limiting resistor from a 5 V rail, or to toggle opto-coupler inputs in PLC relay interface boards without external buffer transistors.
For a 3.3 V microcontroller expanding to 8 relay control signals, how does CD74HC259E reduce the required MCU pin count?
Instead of requiring 8 dedicated GPIO pins, CD74HC259E needs only 3 address pins and 1 data pin from the microcontroller—saving 4 MCU pins. The 3-bit address selects one of the 8 latch outputs, and the data pin sets its state; once written, the latch holds the output state independently, freeing the MCU bus for other tasks without continuous refresh.
At 50 pF load capacitance and a 5 V supply, what propagation delay can be expected from CD74HC259E outputs?
At 50 pF load and 5 V supply, the HC-family CD74HC259E typically exhibits propagation delays of 7 ns to 15 ns from address-decode to output change, consistent with standard HC CMOS timing. This is fast enough for relay board refresh rates well above 1 kHz and LED multiplexing frequencies above 500 Hz without visible flicker in display applications.
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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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