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CD74HC4094PW
Texas Instruments
IC 8STG BUS REG TRI-ST 16-TSSOP
134311 Pcs New Original In Stock
Shift Shift Register 1 Element 8 Bit 16-TSSOP
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5.0 / 5.0
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CD74HC4094PW
Product Overview
1232957
DiGi Electronics Part Number
CD74HC4094PW-DGManufacturer
Texas Instruments
CD74HC4094PW
Description
IC 8STG BUS REG TRI-ST 16-TSSOPInventory
134311 Pcs New Original In Stock
Shift Shift Register 1 Element 8 Bit 16-TSSOP
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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CD74HC4094PW Technical Specifications
Category
Logic, Shift Registers
Packaging
Tube
Series
74HC
Product Status
Discontinued at Digi-Key
Logic Type
Shift Register
Output Type
Tri-State
Number of Elements
1
Number of Bits per Element
8
Function
Serial to Parallel
Voltage - Supply
2V ~ 6V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
16-TSSOP
Base Product Number
74HC4094
Datasheet & Documents
HTML Datasheet
CD74HC4094PW-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
CD74HC4094PWE4-DG
CD74HC4094PW-DG
CD74HC4094PWG4-DG
296-33090-5
CD74HC4094PWG4
CD74HC4094PWE4
Standard Package
90
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Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
DiGi電子的定價合理且公開，不會有任何隱藏的額外費用，非常值得信賴。
de desembre 02, 2025
I appreciate their attention to packaging safety, which ensures product integrity.
de desembre 02, 2025
DiGi Electronics’s quick delivery has always met my urgent requirements.
de desembre 02, 2025
Combining user-friendliness with affordability, DiGi Electronics is excellent.
de desembre 02, 2025
Affordable, reliable, and innovative — that's how I describe DiGi Electronics.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the CD74HC4094PW in a high-noise industrial environment, and how can I mitigate signal integrity issues?
When integrating the CD74HC4094PW in high-noise environments, the primary risk is corruption of the serial data stream due to EMI affecting the data (DS), clock (SHCP), and latch (STCP) lines. Since the device operates with standard CMOS input thresholds, it lacks built-in Schmitt-trigger inputs, making it more susceptible to noise on slow-rising signals. To mitigate this, use series resistors (100Ω–330Ω) near the CD74HC4094PW inputs to damp ringing, place bypass capacitors (0.1µF ceramic) at the VDD pin, and route sensitive traces away from switching power components. Additionally, consider buffering the input signals with Schmitt-trigger buffers (e.g., 74HC14) if rise times are marginal. Ensure the ground plane is solid and minimize loop areas in PCB layout to preserve signal integrity at up to 25 MHz (typical max CLK frequency at 5V).
Can I directly replace an MC74HC4094ADTR2G with the CD74HC4094PW in an existing design, and what are the subtle compatibility differences?
Yes, the CD74HC4094PW can directly replace the MC74HC4094ADTR2G as both are functionally equivalent 8-bit serial-in/parallel-out tri-state shift registers in 16-TSSOP packages from compatible 74HC series. However, note that CD74HC4094PW is listed as discontinued at Digi-Key, posing long-term supply risk compared to ON Semiconductor's MC74HC4094ADTR2G, which may have better availability. Electrically, both devices have similar propagation delays and drive strength (~7.8 mA per output at 5V), but always verify pin compatibility—especially OE (active-low output enable) and STCP (storage clock) behavior under power-up conditions. Consider qualifying the M74HC4094YTTR from STMicroelectronics or CD74HC4094PWR (tape-and-reel variant) as alternatives for production scalability.
How does the tri-state output control in the CD74HC4094PW behave during power-up, and what risks does this pose in bus-sharing applications?
During power-up or when VDD is unstable, the CD74HC4094PW's outputs may float to indeterminate states even when the OE (Output Enable) pin is held low, due to internal logic glitches caused by asynchronous power ramping. This can create bus contention in shared parallel bus designs—such as driving common LED drivers or bus-switching circuits—potentially damaging downstream components. To mitigate, ensure OE is actively pulled low via a resistor (e.g., 10 kΩ) to GND at all times during power transitions. Use a power sequencer or supervisor IC (e.g., TLV803) to assert OE only after VDD stabilizes above 2V. Avoid back-driving the outputs during startup to prevent latch-up, especially if interfacing with other enabled devices on the bus.
What are the implications of using the CD74HC4094PW at 3.3V versus 5V, and how does it affect timing performance in time-critical display control applications?
Operating the CD74HC4094PW at 3.3V reduces switching speed compared to 5V, increasing propagation delays (e.g., from ~25 ns to ~45 ns) and limiting maximum clock frequency to approximately 12–15 MHz. In time-critical applications like driving segmented LED displays or multiplexed loads, this delay stacks across cascaded stages, potentially causing visible lag or refresh artifacts. Additionally, output high voltage (VOH) drops near the logic threshold at 3.3V, reducing noise margin when driving 5V-tolerant inputs. For robust 3.3V designs, verify timing margins with setup/hold times relative to the host microcontroller’s SPI-like signal timing. Consider using the 74HC4094PW-Q100J if automotive-grade consistency across voltage/temperature is needed, or transition to 74AC series devices for higher speed at low voltages, if power consumption allows.
Is the CD74HC4094PW suitable for automotive under-the-hood applications, and how does its operating temperature range compare to qualified alternatives like the 74HC4094PW-Q100J?
While the CD74HC4094PW supports an industrial temperature range of -55°C to 125°C and meets RoHS3 compliance, it is not AEC-Q100 qualified, making it unsuitable for mission-critical automotive under-the-hood use where rigorous reliability testing is required. The 74HC4094PW-Q100J, in contrast, is AEC-Q100 Grade 1 qualified (-40°C to 125°C, Tj), with certified robustness in thermal cycling, humidity, and long-term life testing. Although the base CD74HC4094PW may work in less demanding automotive locations (e.g., cabin controls), lack of Q100 certification increases risk of field failure and disqualifies it from safety-related systems. For automotive designs, prefer the 74HC4094PW-Q100J or consider NXP’s 74HC4094 variants with automotive qualification to ensure supply chain and compliance reliability.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
CD74HC4094PW CAD Models
Texas Instruments CD74HC4094PW PCB symbols & footprints
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