CD74HC21MG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
CD74HC21MG4 is a dual 4-input AND gate IC from Texas Instruments in the HC High-Speed CMOS logic family, providing two independent gates with 4 inputs each. It operates from 2 V to 6 V with 4 mA output drive capability at 50 pF load in a 14-pin SOIC package. Available from stock worldwide for combinational logic, enable decoding, and signal gating applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC21MG4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2310(MOQ 1)
- 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 CD74HC21MG4?
- Dual 4-input AND gate enabling compact multi-condition enable logic, replacing up to 3 cascaded 2-input AND gates in a single device stage
- HC High-Speed CMOS technology with 4 mA output drive and 50 pF load characterization, operating from 2 V to 6 V for 3.3 V and 5 V system compatibility
- 14-pin SOIC plastic/epoxy SMT package with e4 JEDEC halogen-free rating, suitable for RoHS-compliant and green electronics designs
What is CD74HC21MG4 used for?
The CD74HC21MG4 is used in combinational enable logic circuits where all 4 of a set of control or status signals must simultaneously be true before activating a downstream function, such as chip-select decoding in multi-condition address decoders. It also serves in safety interlock circuits for industrial machinery, where 4 independent sensor or switch inputs must all be active before enabling a motor start command. The wide supply range of 2 V to 6 V makes it compatible with both legacy 5 V TTL systems and modern 3.3 V microcontroller-based designs.
What are the specifications of CD74HC21MG4?
| YTEOL | 0 |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | AND GATE |
| Max I(ol) | 0.004A |
| Number of Functions | 2 |
| Number of Inputs | 4 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 50mA |
| Prop. Delay@Nom-Sup | 33ns |
| Propagation Delay (tpd) | 165ns |
| 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 | 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 |
| 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 CD74HC21MG4 datasheet?
CD74HC21MG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC21MG4?
Compatible alternatives and drop-in replacements for CD74HC21MG4:
Frequently Asked Questions
How does using the CD74HC21MG4's 4-input AND gate reduce propagation delay compared to cascading 2-input AND gates?
Implementing a 4-input AND function with standard dual 2-input AND gates requires 3 cascaded gate stages, each adding 7–10 ns of propagation delay at 5 V supply. The CD74HC21MG4 performs the same 4-input AND in a single gate stage, cutting total propagation delay by roughly 2 gate delays—about 14–20 ns—which is critical in timing-sensitive enable decode paths running at 20 MHz or higher clock rates.
What supply voltage range and output drive current does the CD74HC21MG4 provide?
The CD74HC21MG4 operates from 2 V to 6 V supply voltage, making it compatible with 3.3 V, 5 V, and intermediate logic rails. At 5 V it delivers a maximum output low current (I_OL) of 4 mA, which is sufficient to drive up to about 40 standard CMOS inputs or a single low-power indicator LED with a series resistor without violating output voltage specifications.
In what safety-critical interlock scenarios is the CD74HC21MG4 well suited?
Industrial safety interlocks often require that 4 independent conditions—such as door closed, guard in place, E-stop released, and power stable—all be simultaneously asserted before a motor or actuator can start. The CD74HC21MG4 implements this 4-input AND check in hardware at gate speed, responding in under 10 ns with no firmware latency, ensuring faster and more deterministic fault response than a software polled solution.
What is the significance of the e4 JEDEC environmental rating on the CD74HC21MG4?
The e4 JEDEC-609 code indicates the CD74HC21MG4 is manufactured without intentionally added lead (Pb-free) and meets RoHS halogen-free requirements. This classification is mandatory for products sold in the EU under the RoHS directive and is increasingly required by OEM procurement standards in consumer electronics, automotive Tier-1 suppliers, and green electronics programs worldwide, simplifying compliance for designs that include this part.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6600 | $0.66 |
| 607+ | $0.2640 | $160.25 |
| 3031+ | $0.2310 | $700.16 |
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