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STMicroelectronics M74HC75TTR
- Part No.:
- M74HC75TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Latches
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M74HC75TTR.pdf
- Description:
- IC LATCH 4BIT D TYPE 16-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,759
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Product details
Overview
M74HC75TTR from STMicroelectronics is a high-speed CMOS 4-bit D-type latch with two independent 2-bit latch groups, each controlled by dedicated enable inputs (G1•2 and G3•4), operating across 2V–6V supply, delivering 11ns typical propagation delay at 6V, ±4mA symmetrical output drive, and 2µA max quiescent current at 25°C - used in digital logic interfacing, bus isolation, and data sampling circuits.
For engineers reviewing the M74HC75TTR datasheet, M74HC75TTR pinout, M74HC75TTR application, or M74HC75TTR equivalent, key selection criteria include dual-group latch enable control, TSSOP-16 package compatibility, rail-to-rail input thresholds (VIH/VIL = 70%/30% VCC), latch retention behavior under low-enable, and guaranteed operation from –55°C to +125°C.
Technical Context
The M74HC75 implements dual independent 2-bit transparent latches using silicon gate C2MOS technology, where each latch group (1–2 and 3–4) responds only to its dedicated enable signal (G1•2 or G3•4), enabling selective data capture without global reset or clock synchronization. Inputs feature integrated protection against ESD and transient overvoltage.
It operates as a level-sensitive device: outputs follow inputs while enable is HIGH; data is latched and held when enable transitions LOW. Propagation delays tPLH/tPHL are balanced (≤3ns skew at 4.5V), and noise immunity is specified at ≥28% VCC for both VIH and VIL margins.
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 loads) |
| Propagation Delay (tPD) | 11ns (typ.) at VCC = 6V - enables reliable timing in sub-100MHz synchronous logic paths |
| Output Drive Strength | |IOH| = IOL = 4mA (min) - sufficient to drive standard TTL loads or multiple 74HC inputs |
| Input Thresholds | VIH = 70% VCC, VIL = 30% VCC (min) - provides robust noise margin across full voltage range |
| Quiescent Current | ICC = 2µA (max) at TA = 25°C - suitable for low-power hold states in battery-backed systems |
| Operating Temperature | –55°C to +125°C - qualified for industrial and extended-temperature embedded control applications |
| Input Capacitance | CIN = 5pF (typ.) - minimizes loading on upstream drivers and preserves signal integrity |
Pinout & Package
TSSOP-16 package: 4.9–5.1 mm width, 6.2–6.6 mm length, 0.65 mm pitch, 0.45–0.75 mm lead length, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14, 11, 8 | 1Q–4Q | True complementary latch outputs (active-high Q, active-low Q̅) for all four bits |
| 2, 3, 6, 7 | 1D–4D | Independent data inputs feeding respective latch stages; no internal bus contention |
| 4 | G3•4 | Enable input controlling latches 3 and 4 only - allows partial data capture without disturbing latches 1–2 |
| 13 | G1•2 | Enable input controlling latches 1 and 2 only - supports segmented latch control in multi-channel systems |
| 16, 15, 10, 9 | 1Q–4Q | Inverted latch outputs paired with true outputs (e.g., 1Q/1Q̅), enabling differential signaling or NAND/NOR logic expansion |
| 12 | GND | Dedicated ground reference for noise suppression and stable threshold referencing |
| 5 | VCC | Single positive supply pin - no separate VDD/VSS separation required |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent latch groups | Enables selective data capture (e.g., channel A/B isolation in sensor multiplexing) |
| Symmetrical output impedance | Ensures matched rise/fall times (tTLH ≈ tTHL) and reduced signal distortion |
| Rail-to-rail input thresholds | VIH/VIL defined as % of VCC - eliminates need for external biasing in mixed-supply designs |
| High noise immunity | 28% VCC noise margin on both logic thresholds - improves reliability in electrically noisy industrial environments |
| ESD-protected inputs | Integrated diode clamps withstand ±20mA transient current - reduces need for external TVS components |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Isolating sensor data streams before ADC sampling in modular I/O racks. IC Role / Device Role / Timing Role: Transparent latch holding analog mux address or status bits during conversion window. Use Value: Prevents metastability by freezing inputs during critical timing windows; dual-enable allows staggered capture per subsystem. | Use Scenario: Capturing door lock actuator command states prior to power-stage activation. IC Role / Device Role / Timing Role: Level-sensitive storage element synchronizing microcontroller GPIO outputs with high-side driver enable timing. Use Value: Eliminates race conditions between MCU state updates and relay/switch driver turn-on; retains last valid command during brown-out events. |
| Medical Patient Monitor Data Buffering | Test Equipment Signal Conditioning |
Use Scenario: Holding ECG waveform sample addresses during FIFO write cycles in portable monitors. IC Role / Device Role / Timing Role: Data latch buffering parallel bus signals between ASIC and memory controller. Use Value: Enables deterministic read/write arbitration; low ICC supports battery runtime extension without sacrificing throughput. | Use Scenario: Capturing calibration coefficients from EEPROM before DAC programming sequences. IC Role / Device Role / Timing Role: Glitch-free storage of configuration bits during instrument self-test initialization. Use Value: Guarantees coefficient integrity across power-up transients; TSSOP-16 footprint supports high-density PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC75N | DIP-16 package only; identical AC/DC specs but lacks TSSOP thermal performance | Preferred for prototyping or through-hole assembly; not suitable for space-constrained PCBs | Select when manual soldering or breadboard validation is required |
| 74HC573PW | Octal transparent latch with single OE; no dual-enable architecture; higher ICC (4µA max) | Used where unified latch control suffices; incompatible for segmented enable use cases | Choose only if system requires 8-bit width and shared enable, not independent group control |
Compared with SN74HC75N and 74HC573PW, M74HC75TTR uniquely supports independent dual-group latching in a thermally efficient TSSOP-16 package, making it optimal for compact, multi-channel digital systems requiring selective data capture without software overhead.
Availability
M74HC75TTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and medical patient monitor data buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HC75TTR 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, designing and manufacturing microcontrollers, power management ICs, sensors, and discrete components for industrial, automotive, and consumer markets.
The M74HC75 belongs to ST's legacy HC logic family, engineered for pin- and function-compatible replacement of 74LS/74F devices while delivering CMOS power efficiency, wide voltage operation, and enhanced noise immunity.
FAQ
Is M74HC75TTR compatible with 5V TTL logic levels?
Yes - at VCC = 5V, VIH = 3.15V (min) and VIL = 1.35V (max) meet standard TTL input thresholds, and VOH/VOL values ensure clean interfacing with 74LS and 74ALS families without level-shifting circuitry.
What is the maximum clock/data frequency supported by M74HC75TTR?
The device does not use a clock; it is level-triggered. Maximum usable data rate depends on enable pulse width and propagation delay: minimum G pulse width is 6ns at 6V, supporting effective data capture rates up to ~80MHz in burst-mode applications with proper setup/hold timing.
Does M74HC75TTR support hot insertion or live insertion?
No - the device lacks hot-swap protection circuitry. Input structures are not designed for backdrive tolerance during live insertion; VCC must be stable before applying input signals to avoid latch-up or excessive ICC.
Can unused inputs be left floating?
No - all inputs (including G1•2 and G3•4) must be actively driven HIGH or LOW. Floating enables cause undefined output states and increased ICC due to input stage oscillation; tie unused enables to VCC via 10kΩ resistor if permanently enabled.
M74HC75TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 1:8
- Output Type:
- Differential
- Voltage - Supply:
- 2V ~ 6V
- Independent Circuits:
- 2
- Delay Time - Propagation:
- 10ns
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
M74HC75TTR FAQ
1.How can I place an order for M74HC75TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC75TTR 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 M74HC75TTR reliable?
The price and inventory of M74HC75TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC75TTR is usually 5 days.
3.What payment methods are accepted for M74HC75TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC75TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC75TTR?
M74HC75TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC75TTR 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 M74HC75TTR?
For technical support, including M74HC75TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC75TTR requirements.
6.How does Aetrix verify that M74HC75TTR is sourced from the original manufacturer or authorized distributors?
All M74HC75TTR 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 M74HC75TTR meets industry standards.
7.What is the process for return or replacement of M74HC75TTR?
All M74HC75TTR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC75TTR, 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 M74HC75TTR part is unused and in its original packaging.
Return procedure for M74HC75TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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