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STMicroelectronics 74V1G77CTR
- Part No.:
- 74V1G77CTR
- Manufacturer:
- STMicroelectronics
- Category:
- Latches
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74V1G77CTR.pdf
- Description:
- IC LATCH D-TYPE SGL SOT323-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,125
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Product details
Overview
74V1G77CTR from STMicroelectronics is a single D-type transparent latch in SOT323-5L package, operating from 2V to 5.5V with 4.4ns typical propagation delay at 5V, ±8mA symmetrical output drive, and input tolerance up to 7V independent of supply-enabling 5V-to-3V level translation in portable logic interfaces.
For engineers reviewing the 74V1G77CTR datasheet, 74V1G77CTR pinout, 74V1G77CTR application, or 74V1G77CTR equivalent, key selection criteria include latch enable timing (tW = 3.0ns min at 5V), setup/hold times (ts = 2.0ns, th = 1.0ns), ESD-protected I/O, and power-down input protection for mixed-voltage system interfacing.
Technical Context
The 74V1G77CTR implements a transparent D-latch using sub-micron C2MOS technology, where Q follows D when LE is high and holds D's logic state on LE's falling edge. Its input structure accepts 0–7V regardless of VCC, enabling robust voltage-level bridging.
It features symmetrical output impedance (|IOH| = |IOL| ≥ 8mA at 4.5V), balanced tPLH/tPHL propagation delays, and 1µA max ICC at 25°C-optimized for low-power, noise-immune data capture in battery-powered and mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 5.5V - supports dual-supply interface between 3.3V and 5V domains without level shifters |
| tPD (LE→Q) | 4.4ns typ @ 5V - enables high-speed latch operation in ≤227MHz clocked control paths |
| IOL / IOH | ≥8mA @ 4.5V - drives standard TTL loads and multiple CMOS inputs directly |
| VI Input Range | −0.5V to +7.0V - allows safe interfacing with overvoltage-tolerant or floating inputs |
| ICC (Quiescent) | 1µA max @ 25°C - minimizes standby current in always-on latching circuits |
| VNIH/VNIL | 28% VCC min - provides high noise immunity against ground bounce and supply ripple |
| ts / th | 2.0ns / 1.0ns @ 5V - defines minimum D-to-LE timing margin for reliable data capture |
Pinout & Package
SOT323-5L package: 1.3mm × 2.2mm × 0.95mm body, 0.65mm pitch, gull-wing leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | D | Data input - sampled and latched on LE falling edge; tolerant to 0–7V |
| 2 | LE | Latch Enable - high = transparent mode, low = hold; Schmitt-trigger not present |
| 3 | GND | Ground reference - shared return path for all I/O and internal logic |
| 4 | Q | True output - mirrors D when LE high, holds last D value when LE low |
| 5 | VCC | Positive supply - powers internal logic and output drivers; decoupling required |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Accepts −0.5V to +7.0V on D and LE regardless of VCC - eliminates external clamping diodes |
| Power-down input protection | Inputs remain high-impedance and non-destructive when VCC = 0V - safe for hot-insertion |
| Symmetrical output drive | |IOH| = |IOL| ≥ 8mA at 4.5V - ensures matched rise/fall times and reduced signal skew |
| Wide temperature range | Operates from −55°C to +125°C - qualified for industrial and extended-environment applications |
| ESD protection | HBM ≥ 2kV on all pins - meets IEC 61000-4-2 Level 2 for system-level robustness |
Applications
| Portable Power-Managed Logic | 5V-to-3.3V Interface Buffer |
|---|---|
Use Scenario: Latching sensor configuration bits during sleep/wake transitions in handheld medical devices. IC Role / Device Role / Timing Role: D-type latch holding calibration data while main MCU is powered down. Use Value: 1µA max ICC and 0–7V input tolerance allow direct connection to unpowered peripherals without leakage or damage. | Use Scenario: Isolating legacy 5V control signals from a 3.3V FPGA configuration bus. IC Role / Device Role / Timing Role: Voltage-agnostic latch capturing FPGA reset or mode-select commands. Use Value: Input tolerance and 4.4ns tPD ensure glitch-free, sub-5ns timing-critical handshaking across supply domains. |
| Industrial PLC I/O Expansion | Automotive Body Control Module |
Use Scenario: Capturing momentary push-button states in a DIN-rail mounted controller with noisy 24V supply rails. IC Role / Device Role / Timing Role: Debounced latch front-end for digital input acquisition under EMI stress. Use Value: 28% VCC noise immunity and −55°C to +125°C rating maintain reliability in electrically harsh enclosures. | Use Scenario: Storing door-lock actuation command until CAN message confirmation arrives. IC Role / Device Role / Timing Role: Safety-critical hold element synchronizing distributed control actions. Use Value: Balanced tPLH/tPHL and latch-edge precision prevent metastability in time-sensitive vehicle subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G74DCKR | Edge-triggered D flip-flop (not transparent latch); requires clock, not LE; 3.3V-only VCC range | Not suitable for transparent gating or mixed-voltage sampling; requires synchronous clock domain | Select only if edge-triggered behavior and 3.3V-only operation are acceptable |
| 74AUP1G77GW,125 | Lower ICC (0.5µA typ), wider VCC (0.8–3.6V), but no 7V input tolerance; SOT353-5 package | Cannot replace in 5V interface roles; limited to ultra-low-power 1.8V/3.3V systems | Prefer for battery-critical designs where input voltage range is constrained to ≤3.6V |
Compared with SN74LVC1G74DCKR and 74AUP1G77GW,125, the 74V1G77CTR uniquely combines transparent latch functionality, 2–5.5V operation, and 0–7V input tolerance-making it irreplaceable for asynchronous, mixed-voltage data capture where LE-controlled transparency is required.
Availability
74V1G77CTR is available at Aetrix Electronics and suitable for portable electronics, industrial I/O modules, automotive body controllers, and mixed-voltage interface circuits requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74V1G77CTR 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 analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.
The 74V series targets high-speed, low-power CMOS logic with enhanced ruggedness-specifically engineered for portable, battery-operated, and mixed-supply systems demanding voltage flexibility and input overvoltage resilience.
FAQ
Is the 74V1G77CTR pin-compatible with other SOT323-5L logic devices?
No-pinout is specific to this D-latch function: Pin 1 = D, Pin 2 = LE, Pin 3 = GND, Pin 4 = Q, Pin 5 = VCC. It is not interchangeable with inverters, buffers, or flip-flops in the same package due to differing internal logic and terminal assignments.
Can the 74V1G77CTR operate reliably at 2.0V supply?
Yes-data sheet specifies full functionality at VCC = 2.0V, including VIH = 1.5V min, VOL = 0.1V max at 50µA, and tPD = 9.0ns max (CL = 15pF). Performance is characterized across −55°C to +125°C at this voltage.
What is the maximum capacitive load the 74V1G77CTR can drive?
The device is characterized up to CL = 50pF in AC specs. At 5V, tPD increases from 4.4ns (15pF) to 4.8ns (50pF); output drive remains ≥8mA. For loads >50pF, external buffering is recommended to maintain timing integrity.
Does the 74V1G77CTR support hot-swap or live-insertion?
Yes-power-down protection on inputs allows D and LE to be driven while VCC = 0V, with no reverse current or latch-up risk. This enables safe insertion into powered backplanes or live-bus systems without auxiliary circuitry.
74V1G77CTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74V
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 1:1
- Output Type:
- Standard
- Voltage - Supply:
- 2V ~ 5.5V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 4.8ns
- Current - Output High, Low:
- 8mA, 8mA
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323-5
74V1G77CTR FAQ
1.How can I place an order for 74V1G77CTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74V1G77CTR 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 74V1G77CTR reliable?
The price and inventory of 74V1G77CTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74V1G77CTR is usually 5 days.
3.What payment methods are accepted for 74V1G77CTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74V1G77CTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74V1G77CTR?
74V1G77CTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74V1G77CTR 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 74V1G77CTR?
For technical support, including 74V1G77CTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74V1G77CTR requirements.
6.How does Aetrix verify that 74V1G77CTR is sourced from the original manufacturer or authorized distributors?
All 74V1G77CTR 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 74V1G77CTR meets industry standards.
7.What is the process for return or replacement of 74V1G77CTR?
All 74V1G77CTR units undergo pre-shipment inspection (PSI). If there is an issue with 74V1G77CTR, 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 74V1G77CTR part is unused and in its original packaging.
Return procedure for 74V1G77CTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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