CD74HC154M Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74HC154M is a 4-line to 16-line CMOS decoder/demultiplexer with 2 active-low enable inputs, 5.2 mA sink current, and 50 pF load capacity in a 24-pin SOIC package. It fully decodes 4 binary inputs to one of 16 active-low outputs. Available from stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC154M 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
- 4-line to 16-line decoder/demultiplexer with 2 active-low enable inputs for gated output control
- 16 active-low outputs with 5.2 mA sink current driving up to 50 pF load for reliable HC-family fan-out
- 24-pin SOIC package (JESD-30 R-PDSO-G24) providing high integration of full address decoding in compact SMD format
Applications
The CD74HC154M is used for full address decoding in microprocessor memory systems, mapping a 4-bit address bus to one of 16 chip-select lines for RAM, ROM, or peripheral ICs. Its dual enable inputs allow bank-switching by gating the entire decoder on or off without additional logic gates, simplifying multi-bank memory designs. The device also serves as a 1-of-16 demultiplexer in data routing applications and LED segment driver selector circuits in industrial display panels.
Specifications
| YTEOL | 0 |
| Additional Feature | 2 ENABLE INPUTS |
| Family | HC/UH |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | 4-LINE TO 16-LINE DECODER |
| Max I(ol) | 0.0052A |
| Number of Bits | 16 |
| Number of Functions | 1 |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP24,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 44ns |
| Propagation Delay (tpd) | 265ns |
| Qualification Status | Not Qualified |
| 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 (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## CD74HC154M 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 | 8542.39.00.60 |
| Country of Origin | Taiwan |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HC154M:
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Frequently Asked Questions
How do the 2 enable inputs in CD74HC154M add flexibility in multi-bank memory decoding?
Both enable inputs must be LOW simultaneously for any output to go active-low; pulling either enable HIGH forces all 16 outputs HIGH regardless of address inputs. This allows two higher-order address lines or a chip-enable signal to gate the entire CD74HC154M on or off, enabling bank-switching across 16 memory devices without extra AND gates and keeping propagation delay to a single decoder stage of approximately 25 ns at 50 pF load.
What sink current does each CD74HC154M output provide, and how does this limit the number of HC inputs it can drive?
Each output sinks up to 5.2 mA at the VOL spec with a 50 pF capacitive load, which is sufficient to drive approximately 10 standard HC logic inputs drawing about 1 µA each at 5 V supply. For higher fan-out requirements such as driving multiple SRAM OE pins simultaneously, a buffer or HC gate in between ensures adequate drive margin without degrading VOL beyond specification.
How does CD74HC154M compare to a discrete 2-to-4 decoder cascade when decoding 4 address bits to 16 lines?
A CD74HC154M performs full 4-to-16 decoding in a single device with one propagation delay stage (typically 25 ns at 5 V, 50 pF), while cascading a 74HC138 3-to-8 decoder pair adds at least 2 gate delays and requires external gating logic. Using one CD74HC154M in a 24-pin SOIC versus 3 smaller ICs reduces BOM cost, assembly time, and PCB footprint for address-decode circuits in embedded systems.
Can CD74HC154M be used as a 1-of-16 analog or digital demultiplexer, and what signal frequencies are supported?
As a digital demultiplexer, CD74HC154M routes a single data input (applied via the enable pin) to any of 16 output lines selected by the 4-bit address. The HC family's typical propagation delay of 25 ns at 5 V and 50 pF limits reliable demultiplexing to data rates below approximately 20 MHz, making it suitable for routing slower control or status signals but not high-speed serial data streams requiring sub-10 ns switching.
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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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