CD74HCT173MG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
CD74HCT173MG4 is a quad D-type flip-flop IC from Texas Instruments with 3-state outputs and dual output enable in a 16-pin SOIC package. It operates at up to 13MHz clock frequency with HCT logic levels for 5V TTL-compatible systems. Suitable for data storage and bus interfacing in industrial and embedded control designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HCT173MG4 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
What are the key features of CD74HCT173MG4?
- 4-bit D-type flip-flop with 3-state outputs and dual output enable for flexible bus interfacing
- HCT logic family ensures full TTL compatibility at 5V supply for seamless integration with legacy systems
- 13MHz maximum clock frequency supports high-speed data latching in embedded and industrial control applications
- Dual output enable pins allow independent control of output bus direction, simplifying bidirectional bus designs
What is CD74HCT173MG4 used for?
The CD74HCT173MG4 is used in digital systems requiring temporary data storage and tri-state bus control, such as microprocessor data bus buffering and address latching in embedded controllers. Its HCT logic family ensures reliable interfacing between 3.3V CMOS logic and 5V TTL peripherals without level-shifting circuitry. Industrial automation and instrumentation designs leverage its 4-bit parallel storage and enable control for register file and pipeline stage implementations.
What are the specifications of CD74HCT173MG4?
| YTEOL | 0 |
| Additional Feature | WITH DUAL OUTPUT ENABLE |
| Family | HCT |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | D FLIP-FLOP |
| Max Frequency@Nom-Sup | 13000000Hz |
| Max I(ol) | 0.006A |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| 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 | 60ns |
| Propagation Delay (tpd) | 60ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 13MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mexico |
Where can I find the CD74HCT173MG4 datasheet?
CD74HCT173MG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HCT173MG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the CD74HCT173MG4 dual output enable feature simplify bidirectional bus designs?
The CD74HCT173MG4 provides two independent output enable pins that can be combined to gate all 4 output bits simultaneously into a high-impedance state. This 3-state control allows multiple devices to share a common 4-bit data bus at 5V without bus contention, reducing the need for external bus buffers and simplifying PCB routing in microprocessor memory interface designs operating up to 13MHz.
Is CD74HCT173MG4 compatible with both TTL and CMOS logic levels in a mixed 3.3V/5V system?
Yes, the HCT family of the CD74HCT173MG4 accepts TTL-level inputs with VIH as low as 2V, making it fully compatible with 5V TTL outputs as well as 3.3V CMOS drivers. Its output swings to within millivolts of the 5V rail, so 5V peripherals see valid logic levels without level translators. This makes it a drop-in bridge between CMOS microcontrollers and 5V bus logic in industrial and embedded control boards.
For a 4-bit data latch in a PLC I/O module running at 10MHz, why choose CD74HCT173MG4 over an HCT374?
The CD74HCT173MG4 includes a synchronous master reset and dual output enable, which the HCT374 lacks. In a PLC I/O module, the master reset allows all 4 bits to be cleared on a clock edge without bus disruption, and dual enable control gives finer output gating granularity. At 10MHz — well within its 13MHz maximum — the device maintains reliable setup and hold margins, making it preferable where per-clock reset capability is required.
What load capacitance does CD74HCT173MG4 support and how does it affect signal integrity?
The CD74HCT173MG4 is characterized for a 50pF load capacitance per output, which covers most PCB trace and bus capacitances in a 16-pin SOIC layout. Exceeding 50pF increases propagation delay beyond the datasheet-specified values and can degrade signal edges at 13MHz clock rates. Designers should keep output traces short or add series termination resistors of 22-33 ohm when driving longer traces or multiple receiving inputs in parallel.
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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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