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STMicroelectronics M74HC574RM13TR
- Part No.:
- M74HC574RM13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
M74HC574RM13TR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,371
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Product details
Overview
M74HC574RM13TR from STMicroelectronics is a high-speed CMOS octal D-type flip-flop with 3-state non-inverting outputs in TSSOP-20 package, operating from 2V to 6V supply, featuring 90MHz max clock frequency (typ.), 6mA output drive, and ±20µA input leakage at 6V. It serves as an edge-triggered data latch with independent output enable for bus interface isolation in digital control systems.
For engineers reviewing the M74HC574RM13TR datasheet, M74HC574RM13TR pinout, M74HC574RM13TR application, or M74HC574RM13TR equivalent, key selection criteria include 3-state output timing (tPZL/tPLZ ≤32ns at 6V), symmetrical propagation delays (tPLH ≅ tPHL), wide temperature range (–55°C to +125°C), and compatibility with standard 74-series logic level thresholds.
Technical Context
The M74HC574RM13TR implements eight independent D-type latches triggered on the rising edge of CK, with asynchronous 3-state control via active-low OE. Its C2MOS silicon gate process enables low static current (ICC ≤4µA) while maintaining rail-to-rail input voltage tolerance (VI = 0 to VCC).
All inputs include ESD protection diodes; outputs support bidirectional current flow up to ±35mA with defined VOH/VOL under 6mA load. Propagation delay symmetry (tPLH ≅ tPHL) and balanced output impedance ensure minimal skew in parallel data paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 6V - supports mixed-voltage system interfacing (e.g., 3.3V logic driving 5V bus) |
| Max Clock Frequency | 90MHz (typ. at VCC=6V, CL=50pF) - enables high-throughput data capture in real-time control loops |
| Output Drive Strength | ±6mA (min.) - sufficient to drive 10 LS-TTL loads or 50pF PCB trace capacitance without buffering |
| Propagation Delay (CK→Q) | 15ns (typ. at VCC=6V, CL=50pF) - ensures sub-20ns timing margin for 50MHz synchronous buses |
| 3-State Enable/Disable Time | tPZL/tPLZ = 15ns (typ. at VCC=6V) - allows rapid bus turnaround in multiplexed address/data architectures |
| Input Leakage Current | ±0.1µA (max. at TA=25°C) - minimizes standby power in battery-backed register files |
| Operating Temperature | –55°C to +125°C - qualified for industrial motor drives and automotive body control modules |
Pinout & Package
TSSOP-20 (Thin Shrink Small Outline Package), 0.65mm pitch, 6.5mm × 4.4mm body, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Active-Low Output Enable) | Asserting low enables Q0–Q7 outputs; high places all outputs in high-impedance state independent of clock or data |
| 2–9 | D0–D7 (Data Inputs) | Asynchronous parallel data inputs sampled on rising CK edge; tolerate VI = 0 to VCC |
| 11 | CK (Clock Input) | Rising-edge sensitive; minimum pulse width 6ns (VCC=6V) - compatible with fast microcontroller GPIOs |
| 12–19 | Q7–Q0 (3-State Outputs) | Non-inverting latched outputs; high-impedance state isolates bus segments during arbitration |
| 10 | GND | Reference ground for all I/O and internal logic; requires low-inductance connection to minimize switching noise |
| 20 | VCC | Positive supply; decoupling capacitor (100nF ceramic) required within 5mm of pin for stable AC operation |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement for 74LS574 | Eliminates redesign when upgrading from bipolar TTL to low-power CMOS without layout change |
| 3-state output control with no effect on internal latch state | Allows concurrent data loading and bus release - critical for pipelined memory-mapped peripherals |
| High noise immunity (VNIH/VNIL ≥28% VCC) | Rejects >1.2V noise spikes on 5V systems, improving reliability in electrically noisy motor control environments |
| Low quiescent current (ICC ≤4µA) | Enables use in always-on supervisory circuits without compromising battery life in portable instrumentation |
| Wide voltage operation (2V–6V) | Permits direct interface between 3.3V microcontrollers and 5V legacy peripherals without level shifters |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
|
Use Scenario: Latching sensor status bits (door open/closed, seatbelt fastened) before CAN message assembly. IC Role / Device Role / Timing Role: Octal D-flip-flop capturing parallel switch inputs synchronized to MCU clock domain. Use Value: 3-state outputs isolate latched data from shared diagnostic bus until transmission cycle begins. |
Use Scenario: Buffering headlight dimming commands from 3.3V MCU to 5V LED driver ICs. IC Role / Device Role / Timing Role: Level-shifting and timing-isolated interface between low-voltage controller and high-current drivers. Use Value: 6mA drive strength directly sinks LED driver enable inputs without external transistors. |
| Test Equipment Digital Pattern Generator | Medical Infusion Pump Controller |
|
Use Scenario: Holding 8-bit test vector patterns during high-speed serial-to-parallel conversion. IC Role / Device Role / Timing Role: Synchronized data staging register feeding FPGA-based waveform synthesis logic. Use Value: 15ns propagation delay ensures setup time compliance for 50MHz pattern update clocks. |
Use Scenario: Isolating motor direction signals from safety-critical MCU during pump calibration sequences. IC Role / Device Role / Timing Role: Fail-safe output latch enabling hardware-enforced dead-time between H-bridge control signals. Use Value: –55°C to +125°C rating guarantees operation inside sealed pump housing under thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC574PWR | Same logic function and pinout; higher ICC (80µA max at 125°C) and slower tPLH (26ns typ. at 6V) | Less suitable for ultra-low-power battery systems but widely stocked in North America | Select if local inventory availability outweighs 20µA quiescent current penalty |
| 74VHC574FT | Higher fMAX (120MHz typ.), lower CPD (35pF), but narrower VCC range (2V–5.5V) | Preferred for high-speed test equipment where 6V operation is unnecessary | Choose when maximum clock rate >90MHz is required and 5.5V supply ceiling is acceptable |
Compared with SN74HC574PWR and 74VHC574FT, the M74HC574RM13TR offers optimal balance of ultra-low ICC (4µA), full 6V operation, and industrial temperature range - making it preferred for energy-constrained embedded controllers requiring robust voltage margin.
Availability
M74HC574RM13TR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HC574RM13TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with over 45 years of analog and digital IC design expertise.
The M74HC574 belongs to ST's high-speed HC logic family designed for drop-in replacement of legacy TTL in industrial control, instrumentation, and automotive subsystems where low power, wide voltage range, and extended temperature performance are critical.
FAQ
Is M74HC574RM13TR pin-compatible with 74LS574?
Yes - it uses identical TSSOP-20 pinout and logic function: rising-edge clocked D-type latches with active-low 3-state output enable. However, input thresholds differ (HC: 30% VCC vs LS: 0.8V/2.0V), so verify signal levels match 2V–6V operation.
What is the maximum capacitive load this device can drive reliably?
At VCC = 6V, the M74HC574RM13TR maintains specified timing up to 50pF load (per AC specs). With 150pF load, propagation delay increases to 48ns (typ.), still within most 20MHz system timing budgets - add series termination if routing exceeds 10cm.
Can OE be toggled while CK is active without corrupting latched data?
Yes - the OE signal controls only output buffer state and has no effect on internal flip-flop storage. Data remains latched and can be updated on subsequent CK edges even while outputs are in high-impedance mode.
Does this part support hot-swap or live-insertion?
No - the M74HC574RM13TR lacks hot-swap protection circuitry. Applying VCC before GND or connecting to a live bus may cause latch-up due to internal ESD diode conduction; power sequencing per ST's AN2012 guidelines is mandatory.
M74HC574RM13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 90 MHz
- Max Propagation Delay @ V, Max CL:
- 32ns @ 6V, 150pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
M74HC574RM13TR FAQ
1.How can I place an order for M74HC574RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC574RM13TR 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 M74HC574RM13TR reliable?
The price and inventory of M74HC574RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC574RM13TR is usually 5 days.
3.What payment methods are accepted for M74HC574RM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC574RM13TR transactions.
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4.How is shipping managed for M74HC574RM13TR?
M74HC574RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC574RM13TR 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 M74HC574RM13TR?
For technical support, including M74HC574RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC574RM13TR requirements.
6.How does Aetrix verify that M74HC574RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HC574RM13TR 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 M74HC574RM13TR meets industry standards.
7.What is the process for return or replacement of M74HC574RM13TR?
All M74HC574RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC574RM13TR, 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 M74HC574RM13TR part is unused and in its original packaging.
Return procedure for M74HC574RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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