SN74LS138 vs CD74HC138 Comparison
Detailed side-by-side comparison of SN74LS138 by Texas Instruments and CD74HC138 by Texas Instruments. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Specification Comparison
| Parameter | SN74LS138 | CD74HC138 |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Category | Logic ICs | Logic ICs |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $0.28 | $0.18 |
| Function | 3-line to 8-line Decoder/Demultiplexer | — |
| Logic Family | 74LS (Schottky-clamped TTL) | HC (High Speed CMOS) |
| Supply Voltage | 5 V (TTL levels) | — |
| Propagation Delay | 20 ns (typical) | [DATA_NEEDED: propagation delay at rated supply/load] |
| Outputs | 8 active-low (Y0-Y7) | 8 active-low (Y0-Y7) |
| Select Inputs | 3 (A, B, C) | 3 (A0, A1, A2) |
| Enable Inputs | 3 (G1 active-high, G2A/G2B active-low) | 3 (two active-low, one active-high) |
| Output Sink Current | 8 mA | — |
| Power Dissipation | 32 mW (typical) | — |
| Operating Temperature | 0C to +70C | [DATA_NEEDED: operating temperature range per suffix] |
| Package | 16-PDIP (N) | 16-pin PDIP / SOIC (per ordering suffix) |
| Other Packages | SOIC (D), SOP (NS) | — |
| Mounting Type | Through Hole (PDIP variant) | Through-Hole (PDIP variant) / Surface Mount (SOIC variant) |
| Technology | Bipolar TTL MSI | High-speed silicon-gate CMOS |
| RoHS Status | [DATA_NEEDED: RoHS status] | Compliant |
| Applications | High-performance memory decoding, data routing | — |
| Logic Function | — | 3-to-8 Line Decoder/Demultiplexer, inverting outputs |
| Supply Voltage Range | — | 2 V to 6 V |
| Output Type | — | Inverting (active-low) |
| Quiescent Current | — | [DATA_NEEDED: ICC quiescent current] |
| Input Logic Compatibility | — | CMOS (HC level) |
| Datasheet Document | — | SCHS147J (November 1998 - Revised November 2021) |
| Typical Use | — | Memory address decoding, data routing |