CD74HC194PW Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CD74HC194PW is a high-speed CMOS 4-bit bidirectional universal shift register in a 16-pin TSSOP package. It supports parallel load, serial shift-left, shift-right, and hold modes at up to 20 MHz. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC194PW 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
- Bidirectional 4-bit shift register supporting shift-left, shift-right, parallel load, and hold modes for maximum application flexibility
- High-speed CMOS HC/UH family operation at up to 20 MHz with 50 pF load capacitance
- Compact 16-pin TSSOP (R-PDSO-G16) package enabling dense PCB layouts
- Wide operating voltage range typical of HC logic family, compatible with 2V to 6V supply rails
- Low output sink current of 5.2mA per output suitable for driving standard logic loads
Applications
The CD74HC194PW is widely used in digital systems requiring data serialization and deserialization, including UART and SPI interface buffers, data path steering circuits, and sequence generators. It is a core building block in FPGA peripheral glue logic and microcontroller-based designs needing bidirectional data shifting. The device also finds use in industrial control PLCs and test equipment where reliable, high-speed shift register operations are essential.
Specifications
| YTEOL | 0 |
| Additional Feature | HOLD MODE |
| Count Direction | BIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | PARALLEL IN PARALLEL OUT |
| Max Frequency@Nom-Sup | 20000000Hz |
| Max I(ol) | 0.0052A |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 37ns |
| Propagation Delay (tpd) | 265ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| 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 |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 60MHz |
| 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 | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HC194PW:
Parallel In Parallel Out, HC/UH Series, 4-Bit, Right Direction, True Output, CMOS, PDSO16
Frequently Asked Questions
What modes does the CD74HC194PW support?
The CD74HC194PW supports four operating modes: parallel load (synchronous parallel input), shift-right, shift-left, and hold mode (inhibit). These modes are selected via two mode-select inputs (S0, S1), providing maximum flexibility for data routing and manipulation in digital systems.
What is the maximum operating frequency of the CD74HC194PW?
The CD74HC194PW operates at a maximum frequency of 20 MHz at nominal supply voltage with a 50 pF load capacitance, making it suitable for moderate-speed data shifting and serial-to-parallel conversion tasks in embedded systems.
What package does the CD74HC194PW use?
The CD74HC194PW is packaged in a 16-pin TSSOP (R-PDSO-G16), a thin small-outline package with a 0.65mm pitch that is well-suited for compact PCB designs. The PW suffix specifically denotes the TSSOP package in Texas Instruments nomenclature.
Is the CD74HC194PW compatible with 5V logic systems?
Yes, the CD74HC194PW belongs to the HC (High-speed CMOS) logic family which typically supports 2V to 6V supply voltage, making it compatible with both 3.3V and 5V logic systems. Input thresholds are ratiometric to VCC for reliable interfacing.
What are typical applications for the CD74HC194PW?
Typical applications include serial-to-parallel and parallel-to-serial data conversion, data bus steering in microprocessor systems, sequence generation, ring counters, and bidirectional data buffering in industrial control and communication interfaces.
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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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