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STMicroelectronics M74HC533TTR
- Part No.:
- M74HC533TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Latches
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M74HC533TTR.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,444
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Product details
Overview
M74HC533TTR from STMicroelectronics is an octal D-type transparent latch with 3-state inverting outputs, designed for bus-oriented data latching and isolation in digital systems. It operates across 2V–6V, delivers 12ns typical propagation delay at 6V, supports ±6mA output drive, and features active-low latch enable (LE) and output enable (OE) controls. Used in address/data bus buffering in microcontroller-based industrial controllers.
For engineers reviewing the M74HC533TTR datasheet, M74HC533TTR pinout, M74HC533TTR application, or M74HC533TTR equivalent, key selection criteria include 3-state output timing (tPZL/tPLZ), latch enable pulse width (tW(H) = 6ns min at 6V), input noise immunity (28% VCC), symmetrical drive strength, and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
The M74HC533TTR implements eight independent D-type latches with shared LE and OE controls, enabling synchronous capture of parallel data followed by tri-state bus release. Its C2MOS silicon gate process ensures low static current (ICC ≤ 4µA) and high noise margin (VNIH/VNIL ≥ 28% VCC) across –55°C to +125°C.
Propagation delays are balanced (tPLH ≅ tPHL), and output transition times remain consistent (tTLH/tTHL ≤ 15ns at 6V), supporting reliable timing in mixed-voltage 3.3V/5V system interfaces. The inverting 3-state outputs simplify bus arbitration without external inverters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 6V - Enables direct interface with both 3.3V and 5V logic domains without level shifters. |
| tPD (Typ) | 12ns at VCC = 6V - Supports >30 MHz bus operation with margin for setup/hold timing closure. |
| IOL / IOH | ±6mA min - Drives standard TTL loads and multiple CMOS inputs while maintaining rail-to-rail VOH/VOL. |
| ICC (Max) | 40µA at TA = 85°C - Ensures ultra-low standby power in battery-backed or energy-sensitive embedded systems. |
| VNIH / VNIL | 28% VCC min - Provides robust noise rejection against EMI in industrial motor control or power supply environments. |
| tW(H) (Min) | 6ns at VCC = 6V - Allows tight LE pulse generation using standard FPGA or MCU GPIO without dedicated timing logic. |
| CPD | 38pF - Predicts dynamic power consumption (ICC(opr) = CPD × VCC × fIN + ICC/8) for thermal design at known clock rates. |
Pinout & Package
TSSOP-20 package: 6.5mm × 4.4mm body, 0.65mm pitch, 1.2mm height, lead-free, RoHS-compliant surface-mount outline optimized for automated assembly and thermal performance in compact designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-low 3-state output enable - Asserting high disables all Q0–Q7 outputs into high-impedance mode for bus sharing. |
| 2,5,6,9,12,15,16,19 | Q0–Q7 | Inverting 3-state outputs - Each reflects inverted Dn when OE = L and LE transitions from H→L (latched state). |
| 3,4,7,8,13,14,17,18 | D0–D7 | Data inputs - Sampled on LE falling edge; no internal latching without LE assertion. |
| 11 | LE | Latch enable - High enables transparent mode (Q follows D); falling edge captures and holds Dn value. |
| 10 | GND | Ground reference - Shared return path for all I/O and supply currents; must be low-inductance connection. |
| 20 | VCC | Positive supply - Powers internal logic and output drivers; requires local 100nF decoupling per device. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Output Control | Independent OE pin enables bidirectional bus arbitration without external transceivers or direction logic. |
| Symmetrical Drive Strength | |IOH| = IOL ≥ 6mA ensures matched rise/fall times and eliminates skew-induced timing violations on shared lines. |
| Wide Voltage Operation | 2V–6V range supports legacy 5V systems and modern 3.3V/2.5V MCUs without voltage translation components. |
| High Noise Immunity | VNIH/VNIL ≥ 28% VCC reduces susceptibility to ground bounce and switching noise in mixed-signal PCBs. |
| Low Quiescent Current | ICC ≤ 4µA at 25°C minimizes leakage impact in always-on subsystems such as real-time clocks or watchdog circuits. |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Expanding GPIO count on a Cortex-M4-based PLC controller to manage 8-channel relay/digital input bank. IC Role / Device Role / Timing Role: Octal latch buffers address/data bus between MCU and peripheral ASIC; LE synchronized to memory-mapped write strobe. Use Value: Enables deterministic 12ns-latched data capture and 3-state isolation during bus turnaround, eliminating contention with other peripherals. | Use Scenario: Isolating sensor data lines (e.g., door lock status, window position) from main CAN microcontroller domain. IC Role / Device Role / Timing Role: Level-shifting and bus-isolating interface between 5V analog front-end sensors and 3.3V MCU I/O pins. Use Value: 2V–6V operation allows direct 5V sensor interfacing; 28% noise margin prevents false triggers from alternator ripple or load dump transients. |
| Test Equipment Digital Pattern Generator | Medical Infusion Pump Controller |
Use Scenario: Generating synchronized 8-bit stimulus patterns for DUT testing under programmable timing control. IC Role / Device Role / Timing Role: Latching pattern data from FPGA before driving test probes; OE controlled by pattern sequencer for burst-mode output. Use Value: 6ns minimum LE pulse width supports high-speed pattern update rates up to 160MHz; balanced tPLH/tPHL ensures precise edge alignment. | Use Scenario: Safely isolating motor driver enable signals from safety-critical MCU core in Class II medical device. IC Role / Device Role / Timing Role: Providing fail-safe output disable via OE tied to hardware watchdog reset signal. Use Value: Guaranteed high-impedance state on OE high prevents unintended motor activation during reset or brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal latch with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC573PW | Non-inverting outputs; identical pinout except Q0–Q7 polarity; same TSSOP-20 package and 2–6V operation. | Requires logic inversion upstream or downstream if system expects inverted latch outputs. | Select when non-inverted output polarity matches existing schematic or simplifies glue logic. |
| 74LVC573APW | Lower VCC range (1.65–3.6V); higher speed (tPD = 5.2ns typ at 3.3V); ±24mA drive; not 5V-tolerant on inputs. | Restricted to 3.3V-only systems; unsuitable for mixed 5V/3.3V bus interfaces without level translation. | Select for high-speed, low-voltage portable or battery-powered designs where 5V tolerance is unnecessary. |
Compared with SN74HC573PW and 74LVC573APW, the M74HC533TTR uniquely provides inverting 3-state outputs with full 5V tolerance and industrial temperature support, making it optimal for legacy-compatible, noise-prone, or mixed-voltage bus isolation tasks.
Availability
M74HC533TTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, test equipment digital pattern generation, and medical infusion pump controllers requiring stable component supply and long-term lifecycle assurance.
Supply support for M74HC533TTR 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, delivering innovative solutions across automotive, industrial, power, and embedded markets with strong IP and manufacturing vertical integration.
The M74HC533TTR belongs to ST's high-speed HC logic family, engineered for robust, low-power, pin-compatible replacements of legacy 74-series devices in space-constrained, thermally demanding, and electrically noisy applications.
FAQ
What is the function of the LE and OE pins on the M74HC533TTR?
The LE (Latch Enable) pin controls data capture: when high, Q outputs follow D inputs (transparent mode); on its falling edge, D inputs are latched. The OE (Output Enable) pin controls output state: low enables normal logic outputs (inverted), high places all Q outputs in high-impedance mode. Both are active-low functions critical for bus arbitration and timing control.
Can the M74HC533TTR operate reliably at 3.3V supply?
Yes - the M74HC533TTR is fully specified from 2V to 6V, including 3.3V. At VCC = 3.3V, it guarantees VIH ≥ 2.31V, VIL ≤ 1.09V, VOH ≥ 3.13V (at –6mA), VOL ≤ 0.33V (at 6mA), and tPD ≤ 26ns (max), meeting standard 3.3V LVTTL and CMOS interface requirements without level shifting.
Is the M74HC533TTR pin-compatible with the 74HC573?
No - although both are octal 3-state latches in TSSOP-20, the M74HC533TTR has inverting outputs and different pin assignments: Q0–Q7 occupy pins 2,5,6,9,12,15,16,19, whereas 74HC573 uses pins 2–9. Direct replacement requires PCB redesign or adapter routing due to incompatible output polarity and pin mapping.
What is the maximum operating temperature range supported?
The M74HC533TTR is qualified for operation from –55°C to +125°C, with full DC and AC specifications guaranteed across this extended industrial temperature range. This makes it suitable for under-hood automotive, factory-floor automation, and outdoor infrastructure applications where ambient thermal stress exceeds commercial-grade limits.
M74HC533TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- 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:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
M74HC533TTR FAQ
1.How can I place an order for M74HC533TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC533TTR 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 M74HC533TTR reliable?
The price and inventory of M74HC533TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC533TTR is usually 5 days.
3.What payment methods are accepted for M74HC533TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC533TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC533TTR?
M74HC533TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC533TTR 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 M74HC533TTR?
For technical support, including M74HC533TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC533TTR requirements.
6.How does Aetrix verify that M74HC533TTR is sourced from the original manufacturer or authorized distributors?
All M74HC533TTR 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 M74HC533TTR meets industry standards.
7.What is the process for return or replacement of M74HC533TTR?
All M74HC533TTR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC533TTR, 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 M74HC533TTR part is unused and in its original packaging.
Return procedure for M74HC533TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M74HC533TTR Tags
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