CD54HC597F3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The CD54HC597F3A is an 8-bit parallel-input serial-output CMOS shift register from Texas Instruments supporting SISO operation and 20 MHz maximum clock frequency. It operates in the HC/UH logic family with 50 pF load capacitance in a 16-pin ceramic DIP package. Available worldwide for data serialization, SPI expansion, and high-reliability military and industrial applications.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD54HC597F3A 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 CD54HC597F3A?
- 8-bit parallel-in serial-out architecture enabling efficient GPIO expansion over 3-wire SPI interfaces
- 20 MHz maximum clock frequency supporting high-speed serial data transmission in digital systems
- SISO operation mode available for daisy-chaining multiple devices to expand shift register depth
- HC/UH CMOS family operation from 2 V to 6 V covering a wide range of logic supply voltages
- Ceramic DIP-16 package providing hermetic sealing for military-grade and harsh-environment deployments
What is CD54HC597F3A used for?
The CD54HC597F3A is used in GPIO expansion designs where a microcontroller reads 8 parallel digital inputs over a 3-wire SPI serial interface, reducing pin count while maintaining fast data capture at 20 MHz clock rates. It suits industrial PLC digital input modules, control panel button matrix scanning, and data acquisition systems requiring simultaneous latching of 8 parallel inputs. The ceramic DIP-16 package makes it the preferred choice for aerospace, defense, and high-reliability industrial systems demanding hermetic component sealing over extended temperature ranges.
What are the specifications of CD54HC597F3A?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | SISO OPERATION ALSO AVAILABLE |
| Count Direction | RIGHT |
| Family | HC/UH |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | PARALLEL IN SERIAL OUT |
| Max Frequency@Nom-Sup | 20000000Hz |
| Max I(ol) | 0.0052A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 37ns |
| Propagation Delay (tpd) | 265ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Screening Level | 38535Q/M;38534H;883B |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 24MHz |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the CD54HC597F3A datasheet?
CD54HC597F3A Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD54HC597F3A?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How can CD54HC597F3A reduce microcontroller GPIO pin count in industrial digital input modules?
CD54HC597F3A converts 8 parallel digital inputs into a serial data stream using only 3 interface lines: clock, data output, and latch enable. By daisy-chaining multiple CD54HC597F3A devices via SISO mode, a single SPI peripheral can read 16, 24, or more digital inputs while consuming just 3 MCU pins, reducing GPIO requirements and board routing complexity in PLC input cards and factory automation panels.
At what maximum clock frequency can CD54HC597F3A shift data and how does this limit system throughput?
CD54HC597F3A operates at up to 20 MHz clock frequency, completing an 8-bit serial transfer in 400 ns at maximum speed. At 20 MHz with a single device, reading 8 inputs takes under 1 µs, well within most industrial polling cycles of 1 ms to 10 ms. For 4 daisy-chained devices transferring 32 bits, the total serial frame completes in approximately 1.6 µs, still fast enough for real-time digital input sampling applications.
What distinguishes the CD54HC597F3A's ceramic DIP package from plastic DIP alternatives for high-reliability programs?
The CD54HC597F3A uses a ceramic DIP-16 package with hermetic glass-to-metal sealing, providing moisture resistance and thermal stability from -55°C to +125°C that plastic DIP parts cannot match. For military avionics, space ground support equipment, and oil-and-gas downhole electronics where moisture ingress or temperature extremes would cause plastic package delamination, the hermetically sealed ceramic package extends operational lifetime and qualification compliance.
How does CD54HC597F3A differ from CD74HC597 and when should each be specified for a design?
CD54HC597F3A (CD54 prefix) is the military-temperature ceramic version rated for -55°C to +125°C, while CD74HC597 (CD74 prefix) uses plastic packaging and covers 0°C to +85°C or -40°C to +85°C commercial ranges. For consumer or standard industrial applications up to 85°C, CD74HC597 provides cost-effective performance; for defense, aerospace, or extreme industrial environments requiring -55°C cold-start capability and hermetic reliability, CD54HC597F3A is the appropriate choice despite higher cost.
Does CD54HC597F3A support simultaneous parallel latch and serial shift operations for glitch-free input sampling?
Yes, CD54HC597F3A implements separate parallel-load and serial-shift clock inputs, allowing the device to latch all 8 parallel inputs simultaneously with one clock edge and then clock the stored data out serially independent of the input state. This dual-clock architecture prevents metastability from input signal transitions during serial readout, ensuring coherent 8-bit snapshots for digital input scan cycles in safety-critical relay control and motion control systems.
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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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