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STMicroelectronics M74HC563B1R
- Part No.:
- M74HC563B1R
- Manufacturer:
- STMicroelectronics
- Category:
- Latches
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
M74HC563B1R.pdf
- Description:
- IC LATCH OCTAL D 3ST INV 20-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,650
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Product details
Overview
M74HC563B1R from STMicroelectronics is an octal D-type inverting latch with 3-state outputs, designed for bus-oriented digital systems requiring bidirectional data flow control and output isolation. It features 8-bit latched inversion, latch enable (LE) and output enable (OE) inputs, symmetrical 6mA drive capability, 13ns typical propagation delay at 6V, and operates across 2V–6V supply range.
For engineers reviewing the M74HC563B1R datasheet, M74HC563B1R pinout, M74HC563B1R application, or M74HC563B1R equivalent, key selection criteria include its inverting latch behavior, high-noise-immunity thresholds (28% VCC), 3-state output timing (tPZL/tPHZ ≤36ns at 6V), and compatibility with legacy 74-series bus architectures.
Technical Context
The M74HC563 implements a silicon gate C2MOS-based 8-bit transparent latch with active-low OE and active-high LE control logic. Its inverting architecture means Q outputs mirror the complement of D inputs when LE is high, and hold that inverted state when LE transitions low - enabling synchronized data capture on rising-edge-equivalent latch events.
It supports true 3-state output control independent of latching: OE low enables normal logic-level outputs (VOH ≥4.4V / VOL ≤0.26V at 4.5V, 6mA), while OE high forces all eight outputs into high-impedance (IOZ ≤5µA), allowing shared bus arbitration without external gating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal D-type inverting latch with 3-state outputs |
| Supply Voltage Range | 2V to 6V - enables interoperability with 3.3V and 5V logic domains |
| tPD (LE→Q) | 13ns typical at VCC = 6V - ensures fast bus turnaround in high-speed control paths |
| IOL / IOH | 6mA minimum - drives standard TTL loads and multiple CMOS inputs reliably |
| VNIH / VNIL | 28% VCC minimum - provides robust noise margin against EMI in industrial environments |
| ICC (Quiescent) | 4µA max at TA = 25°C - supports ultra-low-power standby in battery-backed systems |
| Operating Temperature | −55°C to +125°C - qualified for automotive under-hood and industrial control applications |
Pinout & Package
Package: Plastic DIP-20 (0.300" wide), 20-pin dual in-line package per mechanical drawing P001J.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state output enable | Asserting low enables Q0–Q7 outputs; high places all outputs in high-Z for bus sharing |
| 2–9 (D0–D7) | Data inputs | Invert and latch on LE high; determine complementary Q output states |
| 11 (LE) | Latch enable | High enables transparent inversion; falling edge captures and holds inverted D values |
| 12–19 (Q0–Q7) | Inverting 3-state latch outputs | Reflect !D when latched and OE low; high-impedance when OE high |
| 10 (GND) | Ground reference | 0V return path for all internal logic and I/O circuits |
| 20 (VCC) | Positive supply | Primary power rail (2–6V); powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Inverting latch action | Q outputs always represent logical complement of D inputs during transparent mode and after latching |
| Pin- and function-compatible with 74LS563 | Direct drop-in replacement in legacy 74-series designs without PCB or firmware changes |
| High noise immunity | Input thresholds guaranteed at ≥28% VCC, reducing susceptibility to ground bounce and crosstalk |
| Low static current | ICC ≤4µA at 25°C enables long-term retention in power-gated subsystems |
| Wide voltage operation | Functional across 2V–6V allows use in mixed-supply systems including 3.3V microcontrollers and 5V peripherals |
Applications
| Industrial PLC Backplane Bus | Legacy 8-bit Microcontroller Data Latching |
|---|---|
Use Scenario: Isolating and latching address/data signals between CPU and peripheral modules on a noisy industrial backplane. IC Role / Device Role / Timing Role: Inverting latch buffers microcontroller data bus to peripheral I/O cards; OE synchronizes with bus grant, LE aligns with memory write strobe. Use Value: 6mA drive strength maintains signal integrity over 15cm traces; 125°C rating ensures reliability in uncooled control cabinets. | Use Scenario: Capturing parallel sensor data from 8-bit ADCs before CPU read cycles in embedded measurement systems. IC Role / Device Role / Timing Role: Acts as input register: LE samples ADC output on conversion complete, OE enables transfer to CPU data bus only during valid read windows. Use Value: Inverting logic simplifies level-shifting interface to older µC families; 13ns tPD enables >30MHz sampling coordination. |
| Test Equipment Signal Conditioning | Automotive Body Control Module I/O Expansion |
Use Scenario: Buffering and isolating DUT interface lines in automated test fixtures where multiple instruments share a common bus. IC Role / Device Role / Timing Role: Provides bidirectional 3-state isolation: OE controlled by instrument select logic, LE synchronized to test pattern clock edges. Use Value: High-impedance leakage <5µA prevents signal contention; 28% VCC noise margin rejects switching noise from relay drivers. | Use Scenario: Expanding GPIO count for door lock actuators, window switches, and LED indicators in BCMs using legacy 5V MCU platforms. IC Role / Device Role / Timing Role: Latches switch inputs and drives discrete loads via external transistors; OE managed by CAN message scheduler for deterministic I/O updates. Use Value: −55°C to +125°C qualification meets AEC-Q100 Grade 2 requirements; 6V max VCC accommodates automotive load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC563N | Same logic function and pinout; TI version specifies tPD = 19ns (typ) at 4.5V vs. ST's 13ns at 6V | Lower drive (4mA) and narrower VCC range (2–6V same, but VOH spec less stringent at 6mA load) | Select when sourcing from TI-authorized channels; verify timing margins in 6V systems |
| 74VHC563N | Faster tPD = 7.5ns (typ) at 5V; higher ICC (20µA max); no −55°C rating | Not qualified for extended temperature; lacks 125°C operation required in under-hood automotive use | Prefer for commercial-grade high-speed bus buffering where temperature range is limited to −40°C to +85°C |
Compared with SN74HC563N and 74VHC563N, M74HC563B1R offers superior high-temperature performance (−55°C to +125°C), tighter noise immunity (28% VCC), and lower quiescent current - making it optimal for automotive and industrial deployments where environmental robustness is critical.
Availability
M74HC563B1R is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy 8-bit microcontroller data latching, and automotive body control module I/O expansion requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for M74HC563B1R 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 ICs with vertical manufacturing and broad analog/mixed-signal portfolio.
M74HC563 belongs to ST's high-speed CMOS logic family, engineered for pin-compatible upgrades of legacy 74LS devices while delivering lower power, wider voltage range, and enhanced noise immunity in industrial and automotive control systems.
FAQ
What is the logic polarity of the M74HC563B1R outputs?
The M74HC563B1R is an inverting octal latch: when LE is high, Q0–Q7 outputs are the logical complements of D0–D7 inputs. After latching (LE falling edge), Q outputs retain those inverted states until next LE transition. This behavior is confirmed in the truth table and logic diagram on page 2 of the official ST datasheet.
Can M74HC563B1R operate reliably at 3.3V supply?
Yes - the device is fully specified from 2V to 6V, with DC and AC parameters validated at 3.3V (e.g., VIH = 2.1V min, VOL = 0.26V max at 6mA). Propagation delay is 18ns typical at 3.3V/50pF, supporting 25+ MHz bus operation in 3.3V systems without level shifters.
How does the 3-state output disable timing compare between OE low-to-high and high-to-low transitions?
tPZH (OE high → Q high-Z) is 36ns max at 6V/50pF, while tPLZ (OE low → Q active) is 32ns max under same conditions. This asymmetry ensures outputs enter high-Z faster than they exit, minimizing bus contention during multi-device enable sequencing in shared-bus systems.
Is M74HC563B1R RoHS compliant and halogen-free?
Yes - STMicroelectronics confirms M74HC563B1R (DIP-20 package) meets RoHS Directive 2011/65/EU and is halogen-free per ST's "ECOPACK®" standard, with lead finish Sn (matte tin) and no intentionally added brominated flame retardants or antimony compounds.
M74HC563B1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 1:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 2V ~ 6V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 12ns
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-DIP
M74HC563B1R FAQ
1.How can I place an order for M74HC563B1R through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC563B1R 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 M74HC563B1R reliable?
The price and inventory of M74HC563B1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC563B1R is usually 5 days.
3.What payment methods are accepted for M74HC563B1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC563B1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC563B1R?
M74HC563B1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC563B1R 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 M74HC563B1R?
For technical support, including M74HC563B1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC563B1R requirements.
6.How does Aetrix verify that M74HC563B1R is sourced from the original manufacturer or authorized distributors?
All M74HC563B1R 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 M74HC563B1R meets industry standards.
7.What is the process for return or replacement of M74HC563B1R?
All M74HC563B1R units undergo pre-shipment inspection (PSI). If there is an issue with M74HC563B1R, 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 M74HC563B1R part is unused and in its original packaging.
Return procedure for M74HC563B1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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