SN74LS21DR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The Texas Instruments SN74LS21DR is a dual 4-input positive-AND gate logic IC from the trusted 74LS family, providing two independent AND gates with four inputs each. It operates with a maximum output low current of 8mA and a load capacitance of 15pF, ensuring reliable signal switching in digital logic designs. Available in a 14-pin SOIC package with RoHS-compliant, lead-free construction for modern circuit board assemblies.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS21DR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0678(MOQ 100)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74LS21DR?
- Dual independent 4-input AND gates in a single 14-pin SOIC package for compact logic designs
- 74LS family compatibility ensures easy integration with existing TTL and LSTTL logic systems
- 8mA maximum output low current provides sufficient drive capability for standard logic loads
- 15pF load capacitance supports reliable operation at typical digital logic switching speeds
What is SN74LS21DR used for?
The SN74LS21DR is widely used in digital logic circuits for combining multiple input signals into a single AND-gated output, such as in address decoding, control logic, and combinational logic networks. It is well-suited for use in microprocessor support circuits, bus control systems, and programmable logic designs where two simultaneous 4-input AND operations are required. Its small SOIC package and 74LS compatibility make it a practical choice for both new designs and legacy system upgrades.
What are the specifications of SN74LS21DR?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | LS |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | AND GATE |
| Max I(ol) | 0.008A |
| Number of Functions | 2 |
| Number of Inputs | 4 |
| Output Characteristics | TOTEM-POLE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 4.4mA |
| Prop. Delay@Nom-Sup | 20ns |
| Propagation Delay (tpd) | 20ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## SN74LS21DR Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Where can I find the SN74LS21DR datasheet?
SN74LS21DR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LS21DR?
Compatible alternatives and drop-in replacements for SN74LS21DR:
Frequently Asked Questions
How many AND gates are in the SN74LS21DR?
The SN74LS21DR contains two independent 4-input AND gates in a single package, allowing two separate logic AND operations to be performed simultaneously, which reduces component count and board space in digital logic designs.
What is the output current capability of the SN74LS21DR?
The SN74LS21DR has a maximum output low current (I_OL) of 8mA, which is sufficient to drive standard TTL and LSTTL logic loads, indicator LEDs with current limiting resistors, and other common digital circuit elements.
What logic family does the SN74LS21DR belong to?
The SN74LS21DR belongs to the 74LS (Low-power Schottky) TTL logic family, which offers a good balance of speed and power consumption and is pin-compatible with other 74-series logic devices for easy system integration.
What package does the SN74LS21DR use?
The SN74LS21DR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, as indicated by the JESD-30 code R-PDSO-G14, providing a compact surface-mount footprint suitable for automated PCB assembly.
Is the SN74LS21DR RoHS compliant?
Yes, the SN74LS21DR is RoHS compliant and lead-free (Pb-free), as indicated by its Pbfree Code designation, making it compatible with modern environmentally regulated manufacturing processes and green electronics standards.
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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 |
|---|---|---|
| 100+ | $0.0691 | $6.91 |
| 250+ | $0.0685 | $17.13 |
| 500+ | $0.0678 | $33.90 |
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