74LS21PC, AND Gate, TTL, PDIP14, Bulk package, Active lifecycle, RoHS non-compliant.
| Parameter | Value |
|---|---|
| Series | * |
| Package | Bulk |
Expert opinion by Distributor Dahlia · Authorized Distributor Product & Sourcing Specialist
This is a standard catalog item for through-hole TTL logic, so supply continuity is predictable through the independent distribution channel. The part is RoHS non-compliant, which is typical for legacy TTL devices — verify your assembly's exemption status before ordering.
The PDIP14 package is a 14-pin dual in-line footprint for through-hole soldering.
A 74HC21 is a CMOS equivalent with a different supply voltage range and input thresholds. The 74LS21PC is TTL logic with a nominal 5 V supply and TTL-compatible input levels. Direct replacement requires verifying the system's supply voltage and logic-level compatibility; the 74HC21 operates from 2 V to 6 V but has CMOS thresholds. For a drop-in TTL replacement, stay within the 74LS family.
The 74LS21PC is a standard 74LS TTL AND gate. Key characteristics include a nominal supply voltage of 5 V, TTL input thresholds (low ≤ 0.8 V, high ≥ 2.0 V), and typical propagation delay around 10 ns. Detailed electrical specifications are provided in the 74LS21 datasheet.