CD74HC85MT Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74HC85MT is a 4-bit cascadable magnitude comparator producing A>B, A=B, and A<B outputs in a 16-pin SOIC package. From $0.40, in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC85MT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4463(MOQ 10)
- 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 CD74HC85MT?
- 4-bit parallel magnitude comparison with cascadable expansion inputs allows chaining multiple devices to compare 8-bit, 12-bit, or wider words without extra logic gates
- Three simultaneous comparison outputs (A>B, A=B, A<B) eliminate external decoding logic in sorting, priority, and range-detection circuits
- HC CMOS family operates from 2 V to 6 V supply with 50 pF load drive capability, compatible with both 3.3 V and 5 V digital systems
What is CD74HC85MT used for?
The CD74HC85MT is used in digital control systems, PLCs, and data acquisition hardware to compare addresses, set-points, or counter values against a reference without consuming microcontroller cycles. Its cascadable expansion inputs allow designers to build 8-bit or 16-bit comparators by daisy-chaining two or four devices, covering address decoding and alarm threshold detection in industrial controllers. The SOIC-16 package integrates cleanly alongside standard CMOS logic families on mixed-voltage boards.
What are the specifications of CD74HC85MT?
| YTEOL | 0 |
| Additional Feature | CASCADABLE, THREE POSSIBLE OUTPUTS ARE A B |
| Family | HC |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | MAGNITUDE COMPARATOR |
| Max I(ol) | 0.0052A |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 42ns |
| Propagation Delay (tpd) | 295ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 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) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Mexico |
Where can I find the CD74HC85MT datasheet?
CD74HC85MT Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC85MT?
Compatible alternatives and drop-in replacements for CD74HC85MT:
Frequently Asked Questions
How can CD74HC85MT devices be cascaded to compare values wider than 4 bits?
Two CD74HC85MT devices can compare 8-bit words by connecting the A>B, A=B, and A<B outputs of the lower-order stage to the cascade input pins (IA>B, IA=B, IA<B) of the higher-order stage, propagating the comparison result upward with correct priority, enabling 8-bit, 12-bit, or 16-bit comparisons using 2 to 4 devices.
What supply voltage range and output drive does the CD74HC85MT support?
The CD74HC85MT operates from 2 V to 6 V supply voltage, with a maximum output sink current of 5.2 mA and a 50 pF rated load capacitance, making it compatible with both 3.3 V and 5 V CMOS logic systems without level translators.
What are the three comparison outputs of the CD74HC85MT and how are they used in threshold detection?
The device simultaneously drives three outputs: A greater than B (A>B), A equal to B (A=B), and A less than B (A<B), each valid while inputs are stable, allowing a PLC counter stage to immediately determine whether a measured value is above, at, or below a 4-bit set-point without additional decoder logic.
When is the CD74HC85MT preferred over a software comparison in an 8-bit microcontroller system?
Hardware comparison with CD74HC85MT executes in a single propagation delay of approximately 13 ns at 5 V, whereas a software comparison in an 8-bit MCU running at 8 MHz takes at least 2 to 4 instruction cycles (250 to 500 ns), so the hardware comparator is preferred in time-critical interrupt-driven or glitch-detection applications where deterministic sub-microsecond response is required.
Is the CD74HC85MT compatible with 74LS85 or 74HCT85 in existing board designs?
The CD74HC85MT is pin-compatible with the 74LS85 and 74HCT85 in a 16-pin SOIC footprint, and its HC CMOS inputs (VIH ≥ 3.5 V at 5 V) accept TTL-level outputs from 74LS logic directly, making it a drop-in upgrade that reduces supply current from typically 24 mA (LS) to under 1 µA quiescent (HC).
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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 |
|---|---|---|
| 10+ | $0.8310 | $8.31 |
| 25+ | $0.7512 | $18.78 |
| 100+ | $0.6635 | $66.35 |
| 1000+ | $0.5974 | $597.40 |
| 10000+ | $0.5327 | $5327.00 |
| 100000+ | $0.4463 | $44630.00 |
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