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onsemi MC74VHC594DTR2G
- Part No.:
- MC74VHC594DTR2G
- Manufacturer:
- onsemi
- Category:
- Shift Registers
- Package:
- -
- Datasheet:
-
MC74VHC594DTR2G.pdf
- Description:
- MC74VHC594DTR2G
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Product details
Overview
MC74VHC594DTR2G from onsemi is an 8-bit serial-in/parallel-out shift register with separate storage register, operating from 2.0 V to 5.5 V. It features dual positive-edge clocks (SRCLK and RCLK), independent clear inputs (SRCLR and RCLR), and cascading-capable serial output QH'. Used in LED matrix drivers, digital control interfaces, and data distribution systems requiring synchronized latching.
For engineers reviewing the MC74VHC594DTR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its 185 MHz max clock frequency at 5 V, 8-bit parallel output latching capability, dual-clock timing independence, and automotive-grade AEC-Q100 qualification for industrial control and display subsystems.
Technical Context
The MC74VHC594DTR2G implements a two-stage pipeline: an 8-bit shift register fed by SER input and clocked by SRCLK, followed by an 8-bit D-type storage register clocked by RCLK. This architecture enables asynchronous data shifting and synchronous output latching - critical for glitch-free display updates and buffered I/O expansion.
Separate SRCLR and RCLR inputs allow independent reset of shift and storage registers, while QH' provides ripple-cascadable serial output. Propagation delays are balanced (tPLH/tPHL ≤ 11.4 ns at 5 V, CL = 50 pF), and noise immunity is specified at 28% VCC for both VIH and VIL thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 5.5 V - supports mixed-voltage system interfacing and battery-powered operation down to 2 V. |
| fmax | 185 MHz (typ) at VCC = 5 V - enables high-speed serial data loading for real-time display refresh or fast I/O expansion. |
| ICC (max) | 4.0 μA at TA = 25°C - ultra-low static power ideal for always-on control logic and energy-sensitive embedded nodes. |
| VIH/VIL | 3.85 V / 1.65 V at VCC = 5.5 V - 28% VCC noise margin ensures robust operation in electrically noisy industrial environments. |
| tPLH/tPHL | ≤ 11.4 ns (RCLK to QA–QH, VCC = 5 V, CL = 50 pF) - tight propagation matching minimizes skew across all 8 outputs. |
| Output Drive | ±8 mA (IOL/IOH) - sufficient to directly drive LEDs or interface with standard CMOS/TTL loads without external buffers. |
| ESD Rating | HBM 2000 V, CDM 1000 V - meets industrial handling requirements and reduces need for external protection circuitry. |
Pinout & Package
TSSOP-16 package (Case 948F), 4.4 mm × 5.0 mm body, 0.65 mm pitch, Pb-free, RoHS compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RCLK) | Storage register clock | Positive-edge-triggered latch enable for QA–QH; decoupled from shift clock for precise output update timing. |
| 2 (RCLR) | Storage register clear | Asynchronous active-low reset of QA–QH outputs; independent of RCLK and shift register state. |
| 3 (SER) | Serial data input | Primary data entry point for shift register; sampled on rising SRCLK edge. |
| 4 (QA) | Parallel output A | LSB of latched 8-bit output bus; synchronized to RCLK, not SRCLK. |
| 5 (VCC) | Power supply | 2.0–5.5 V supply rail; powers both shift and storage registers and output drivers. |
| 6 (QH') | Serial output complement | Inverted serial output for daisy-chaining multiple MC74VHC594DTR2G devices without external inverters. |
| 7 (SRCLR) | Shift register clear | Asynchronous active-low reset of internal shift register; does not affect QA–QH latch contents. |
| 8 (SRCLK) | Shift register clock | Positive-edge-triggered clock for serial data advancement; may be tied to RCLK only if one-cycle delay is acceptable. |
| 9 (QE) | Parallel output E | Bit 5 of latched 8-bit output (0-indexed: QA=0, QB=1, QC=2, QD=3, QE=4). |
| 10 (QD) | Parallel output D | Bit 4 of latched 8-bit output; part of fully buffered, low-skew parallel port. |
| 11 (QC) | Parallel output C | Bit 3 of latched 8-bit output; identical DC and AC specs across all Qx pins. |
| 12 (QB) | Parallel output B | Bit 1 of latched 8-bit output; shares same drive strength and timing as QA–QH. |
| 13 (GND) | Ground reference | Return path for VCC and all I/O; requires low-impedance PCB connection to minimize ground bounce. |
| 14 (QH) | Parallel output H | MSB of latched 8-bit output; matches QA–QG in voltage levels, timing, and load capability. |
| 15 (QG) | Parallel output G | Bit 6 of latched 8-bit output; supports simultaneous 8-bit output assertion with sub-12 ns skew. |
| 16 (QF) | Parallel output F | Bit 7 of latched 8-bit output; completes full byte-wide output port for LED column drivers or GPIO expanders. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent clocks | SRCLK and RCLK enable pipelined operation: data shifts continuously while outputs update synchronously on demand - essential for flicker-free LED displays. |
| Separate clear controls | RCLR and SRCLR allow selective reset of latched outputs or shift register without disturbing the other stage - simplifies initialization and error recovery sequences. |
| QH' cascading output | Inverted serial output eliminates need for external inverters when chaining multiple MC74VHC594DTR2G devices - reduces component count and board space in multi-digit LED drivers. |
| AEC-Q100 qualified | NLV prefix variant available; MC74VHC594DTR2G shares process and design with NLV74VHC594DTR2G - supports automotive infotainment and instrument cluster designs requiring PPAP compliance. |
| Pb-free & RoHS compliant | TSSOP-16 package meets global environmental regulations; no lead, halogens, or brominated flame retardants - suitable for consumer, medical, and industrial end equipment. |
Applications
| LED Matrix Display Driver | Industrial I/O Expander |
|---|---|
|
Use Scenario: Driving 8×8 or 8×16 LED dot-matrix panels in signage, instrumentation, or status indicators. IC Role / Device Role / Timing Role: Serial-to-parallel converter with latched outputs; shifts column data rapidly via SER/SRCLK, then strobes all 8 rows simultaneously via RCLK. Use Value: Eliminates microcontroller GPIO overhead and prevents partial-row ghosting by ensuring all outputs change only on RCLK edges - enabling crisp, stable display updates. |
Use Scenario: Adding 8-bit parallel output capability to microcontrollers with limited GPIO, e.g., PLC modules or sensor interface boards. IC Role / Device Role / Timing Role: Buffered output expander; accepts serial commands from UART/SPI peripherals and presents latched parallel signals to relays, solenoids, or logic circuits. Use Value: Provides ±8 mA per output and 28% VCC noise margin - drives industrial loads directly without level-shifting or buffering, reducing BOM cost and layout complexity. |
| Automotive Cluster Backlight Control | Test Equipment Pattern Generator |
|
Use Scenario: Controlling brightness and sequencing of backlight segments in automotive instrument clusters per AEC-Q100 requirements. IC Role / Device Role / Timing Role: Synchronized output latcher; receives PWM-modulated serial data and applies it to backlights with precise RCLK-aligned updates to avoid visible stepping artifacts. Use Value: AEC-Q100 qualification and −55°C to +125°C operating range ensure reliability in under-hood and dashboard environments - no derating needed for automotive thermal profiles. |
Use Scenario: Generating deterministic 8-bit test patterns for digital circuit validation, boundary-scan support, or FPGA configuration verification. IC Role / Device Role / Timing Role: Programmable pattern register; shift register loads test vectors serially, storage register holds and asserts them in parallel for stable stimulus application. Use Value: 185 MHz max clock and ≤11.4 ns output skew guarantee nanosecond-precision timing alignment across all 8 bits - critical for high-speed digital test repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit shift-and-latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC595PWR | Single clock (SHCP) shared for shift and storage; no independent RCLK/SRCLK; lower fmax (100 MHz typ at 5 V); no QH' output. | Lacks independent latching control - unsuitable for applications requiring continuous shift + periodic output update (e.g., live LED displays). | Select SN74HC595PWR only when simpler timing control suffices and cascading without inversion is acceptable. |
| 74LV595PW,118 | Lower VCC range (1.0–5.5 V); higher ICC (20 μA typ); no AEC-Q100 variant; identical pinout but different AC specs (tPLH up to 18 ns at 5 V). | Broader supply range benefits ultra-low-voltage systems, but reduced speed and lack of automotive qualification limit use in demanding industrial or automotive contexts. | Choose 74LV595PW,118 for battery-powered portable gear below 2.0 V; retain MC74VHC594DTR2G for high-speed, noise-immune, or automotive-grade designs. |
Compared with SN74HC595PWR and 74LV595PW,118, the MC74VHC594DTR2G uniquely delivers independent shift/latch clocks, QH' cascading, 185 MHz speed, and AEC-Q100 readiness - making it the only option among the three for glitch-free, high-reliability, high-throughput serial-to-parallel conversion in automotive and industrial control.
Availability
MC74VHC594DTR2G is available at Aetrix Electronics and suitable for LED display drivers, industrial I/O expanders, automotive backlight controllers, and test equipment pattern generators requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for MC74VHC594DTR2G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and logic ICs for automotive, industrial, cloud, and consumer markets.
The MC74VHC594DTR2G belongs to the VHC logic family - designed for high-speed, low-power, wide-supply-voltage operation in noise-sensitive embedded control and display subsystems.
FAQ
What is the maximum clock frequency supported by the MC74VHC594DTR2G?
The MC74VHC594DTR2G supports a maximum clock frequency of 185 MHz (typical) at VCC = 5.0 V with 50% duty cycle and CL = 50 pF. At VCC = 3.3 V, fmax drops to 150 MHz (typ). These values are measured under specified AC test conditions and represent guaranteed performance limits per the official onsemi datasheet Rev. 1 (August 2021).
Does the MC74VHC594DTR2G have separate clocks for shifting and latching?
Yes, the MC74VHC594DTR2G uses two independent positive-edge-triggered clocks: SRCLK controls the 8-bit shift register, and RCLK controls the 8-bit storage register. This separation allows continuous serial data loading while holding stable parallel outputs - a key advantage over single-clock alternatives like the SN74HC595.
What is the function of the QH' pin on the MC74VHC594DTR2G?
The QH' pin on the MC74VHC594DTR2G provides the inverted serial output of the shift register's most significant bit. It enables direct daisy-chaining of multiple MC74VHC594DTR2G devices without external inverters - simplifying multi-stage LED driver or I/O expander designs where cascaded serial data flow is required.
Is the MC74VHC594DTR2G qualified for automotive applications?
The MC74VHC594DTR2G itself is not AEC-Q100 qualified, but its pin-compatible variant NLV74VHC594DTR2G is explicitly rated for automotive use and PPAP capable. Both share identical electrical, thermal, and mechanical specifications except for qualification documentation and traceability - making MC74VHC594DTR2G suitable for pre-qualification prototyping and NLV74VHC594DTR2G for production automotive systems.
What are the absolute maximum ratings for VCC and operating temperature of the MC74VHC594DTR2G?
The MC74VHC594DTR2G has an absolute maximum VCC rating of −0.5 V to +6.5 V and a junction temperature limit of +150°C. Its recommended operating free-air temperature range is −55°C to +125°C, supporting deployment in extended industrial and under-hood automotive environments without derating.
MC74VHC594DTR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Logic Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Function:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MC74VHC594DTR2G FAQ
1.How can I place an order for MC74VHC594DTR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHC594DTR2G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC74VHC594DTR2G reliable?
The price and inventory of MC74VHC594DTR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHC594DTR2G is usually 5 days.
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MC74VHC594DTR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHC594DTR2G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC74VHC594DTR2G?
For technical support, including MC74VHC594DTR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHC594DTR2G requirements.
6.How does Aetrix verify that MC74VHC594DTR2G is sourced from the original manufacturer or authorized distributors?
All MC74VHC594DTR2G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC74VHC594DTR2G meets industry standards.
7.What is the process for return or replacement of MC74VHC594DTR2G?
All MC74VHC594DTR2G units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHC594DTR2G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC74VHC594DTR2G part is unused and in its original packaging.
Return procedure for MC74VHC594DTR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC74VHC594DTR2G Tags
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