M74VHC1GT50DFT1G - Single Non-Inverting Buffer/Level Shifter | onsemi
MPN: M74VHC1GT50DFT1G ✓ Hoạt độngM74VHC1GT50DFT1G Tóm tắt
What is a non-inverting buffer / level shifter? It is a single-bit logic device that regenerates an input signal to a full-rail output without inverting its polarity. When TTL logic swings (0.8 V/2.0 V thresholds) must drive a higher-voltage CMOS rail (3.3 V or 5 V), a TTL-to-CMOS level shifter buffer is required; the device sits in the signal chain between an upstream controller and a downstream CMOS load, restoring logic levels and providing isolation. This hierarchy places it under: buffer → line driver → logic IC → integrated circuit → semiconductor.
Key features include TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V when VCC = 5 V), CMOS-compatible outputs (VOH > 0.8·VCC, VOL < 0.1·VCC at rated load), 5 V tolerant inputs with power-down protection on both inputs and outputs, and balanced propagation delays. The part is fabricated with silicon-gate CMOS technology that achieves bipolar-Schottky-TTL-like speed while maintaining CMOS-level quiescent dissipation. The SC-88A/TSOP-5 footprint occupies only ~2.0 mm × 2.1 mm of board area.
Typical applications include interfacing 5 V TTL peripherals to 3.3 V or 2.5 V CMOS logic domains, signal conditioning in mixed-voltage microcontroller designs, and clock or single-line data buffering in portable, industrial, and consumer systems. Designers select this part when board space is constrained and a true single-gate buffer is required without the overhead of multi-channel drivers.
A primary design consideration is input-edge speed: although the device accepts slow TTL edges, the output rise/fall time depends on the load capacitance and VCC. Decouple VCC with a 0.1 µF ceramic capacitor placed as close as possible to pin 5, and avoid driving large capacitive loads without a series damping resistor.
This page synthesizes distributor pricing, drop-in same-package alternatives from onsemi and competing vendors, and practical design notes that go beyond the manufacturer datasheet summary.
Bộ thay thế dễ dàng lắp đặt cho M74VHC1GT50DFT1G — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với M74VHC1GT50DFT1G (cùng hình factor và footprint) — khác nhau ở Function, Logic Family, Package, Propagation Delay (tPD), Quiescent Current (ICC).
MC74VHC1GT50DFT1G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC74VHC1GT50DTT1G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC74VHC1G50DFT1G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC74VHC1GT50DF1G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SN74LVC1G34DBVR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
74LVC1G34GW
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
M74VHC1GT50DFT1G Tỷ lệ tối đa & tính chất điện
| Chức năng | Single Non-Inverting Buffer / CMOS Logic Level Shifter |
| Logic Family | VHC (High-Speed CMOS, TTL-compatible inputs) |
| Number of Elements | 1 |
| Number of Bits per Element | 1 |
| Kiểu đầu ra | CMOS (Single-Ended) |
| Polarity | Non-Inverting |
| Supply Voltage (VCC) | 1.65 V to 5.5 V |
| Input Threshold VIL (VCC = 5 V) | 0.8 V |
| Input Threshold VIH (VCC = 5 V) | 2.0 V |
| Output High VOH | > 0.8 × VCC |
| Output Low VOL | < 0.1 × VCC |
| Propagation Delay (tPD) | 3.5 ns (typical at VCC = 5 V) |
| Quiescent Current (ICC) | 1 µA (maximum at TA = 25 °C) |
| Input / Output Power-Down Protection | Yes |
| Hộp | SC-88A / TSOP-5 / SOT-353 (5-pin) |
| Nhiệt độ hoạt động | -55 °C to +125 °C |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Marking Code | VLx |
Cấu hình chân M74VHC1GT50DFT1G
| Chân 1 | NC — No connect (per SC-88A CASE 483-02 outline) |
| Chân 2 | A — Data input (TTL-compatible) |
| Chân 3 | GND — Ground |
| Chân 4 | Y — Data output (CMOS, non-inverting) |
| Chân 5 | VCC — Supply voltage (1.65 V to 5.5 V) |
Ứng dụng tiêu biểu
M74VHC1GT50DFT1G phù hợp cho 6 Áp dụngs: 5 V TTL to 3.3 V CMOS Logic Level Shifting, Clock Signal Buffering and Distribution, Single-Line UART / SPI Signal Conditioning, Reset and Control Signal Regeneration, Portable and Battery-Powered Consumer Electronics, Industrial Sensor Interface Conditioning.
5 V TTL to 3.3 V CMOS Logic Level Shifting
The M74VHC1GT50DFT1G's TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V at VCC = 5 V) make it an ideal translator from 5 V TTL peripherals (such as legacy 74LS-series logic or 5 V microcontrollers) into a 3.3 V or 2.5 V CMOS logic domain. Place the part between the 5 V source and the lower-voltage CMOS receiver with VCC tied to the CMOS rail; the input accepts the full 0-5 V TTL swing and the output regenerates a clean rail-to-rail CMOS signal at 3.3 V. Unlike a simple resistor divider, this buffer restores edge speed (3.5 ns typical tPD at 5 V) and provides input-to-output isolation, eliminating ground-bounce and ringing in mixed-voltage designs.
Được đề xuất
Clock Signal Buffering and Distribution
The M74VHC1GT50DFT1G serves as a high-speed single-gate clock buffer with 3.5 ns typical propagation delay at VCC = 5 V, low 1 µA quiescent current, and balanced rise/fall propagation delays that preserve clock duty cycle. Place the device between a master oscillator and downstream CMOS loads to isolate the oscillator from capacitive loading, fan out the clock to a remote IC, or shift a 5 V clock into a 3.3 V clock domain. Compared to multi-channel clock drivers, this single-gate form factor is ideal when only one auxiliary buffer is required and PCB area is at a premium.
Được đề xuất
Single-Line UART / SPI Signal Conditioning
In portable and embedded designs, the M74VHC1GT50DFT1G is used to condition and level-shift single-ended UART or SPI lines between mixed-voltage MCUs and external peripherals. Its 5 V-tolerant input and CMOS-compatible output (VOH > 0.8 × VCC, VOL < 0.1 × VCC) provide a robust, low-power solution for translating a 5 V FTDI-style debug UART into a 3.3 V MCU UART, or buffering a 3.3 V SPI chip-select signal up to a 5 V peripheral. The part's 1 µA quiescent current at 25 °C makes it suitable for battery-powered applications where standby drain is critical.
Được đề xuất
Reset and Control Signal Regeneration
The M74VHC1GT50DFT1G is widely used to regenerate and clean up reset, chip-select, or enable signals that have been degraded by long PCB traces or high-capacitive loads. Place it at the receiving end of a long reset trace in a backplane or industrial control board; the buffer's 3.5 ns tPD and sharp CMOS output thresholds restore a clean edge, preventing false resets caused by ringing. Power-down protection on input and output also makes it safe for hot-insertion scenarios where signals may be present before VCC ramps.
Được đề xuất
Portable and Battery-Powered Consumer Electronics
With a maximum quiescent current of 1 µA at 25 °C and a wide 1.65 V to 5.5 V operating range, the M74VHC1GT50DFT1G is well suited for portable, battery-powered consumer products where standby drain must be minimized. Typical uses include buffering an always-on interrupt line from a sensor to a low-power MCU, level-shifting a button-press signal across voltage domains, or isolating a watchdog timer output. The TSOP-5/SC-88A footprint occupies only ~2.0 × 2.1 mm, allowing placement adjacent to connectors or test points without disturbing dense layouts.
Được đề xuất
Industrial Sensor Interface Conditioning
In industrial sensor-interface designs the M74VHC1GT50DFT1G is used as a logic-level conditioner between 5 V sensor outputs (e.g., proximity switches, optical encoders) and 3.3 V industrial MCU inputs. The TTL-compatible input thresholds accept long-cable 5 V sensor signals while rejecting common-mode noise, and the CMOS output cleanly drives the MCU GPIO. Its -55 °C to +125 °C operating range, RoHS compliance, and onsemi's industrial-grade qualification make it suitable for factory automation, PLC I/O conditioning, and motor-control feedback signal chains.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho M74VHC1GT50DFT1G — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC74VHC1GT50DFT1G | MC74VHC1GT50DTT1G | MC74VHC1G50DFT1G | SN74LVC1G34DBVR | 74LVC1G34GW |
|---|---|---|---|---|---|---|
| Package | SC-88A / TSOP-5 / SOT-353 (5-pin) | SC-88A / TSOP-5 (5-pin) - same | SC-88A / TSOP-5 (5-pin) - same | SC-88A / TSOP-5 (5-pin) - same | SOT-23-5 (5-pin) - pin-compatible | SC-88 / SOT-353 (5-pin) - same |
| Brand | onsemi | onsemi | onsemi | onsemi | Texas Instruments | NXP Semiconductors |
| Supply Voltage (VCC) | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | |
| Input Threshold Type | TTL-compatible | TTL-compatible | Standard CMOS | CMOS | CMOS | |
| Propagation Delay (tPD @ 5 V) | 3.5 ns (typical) | 3.5 ns (typical) | ~2.0 ns typical at 5 V | ~2.0 ns typical at 5 V | ||
| Quiescent Current (max @ 25 °C) | 1 µA | 1 µA | 1 µA | 10 µA | 10 µA | |
| Polarity | Non-Inverting | Non-Inverting | Non-Inverting | Non-Inverting | Non-Inverting | |
| Output Type | CMOS (single-ended) | CMOS | CMOS | CMOS | ||
| RoHS Compliance | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- TTL-compatible input thresholds at CMOS supply voltages (vsMC74VHC1G50DFT1G (standard CMOS inputs))
- Ultra-low 1 µA quiescent current at 25 °C (vsSN74LVC1G34DBVR (TI LVC1G family))
- Dual prefix (M / MC) for legacy-system compatibility (vsMC74VHC1GT50DFT1G (full prefix))
Ghi chú thiết kế
Decouple VCC (pin 5) with a 0.1 µF X7R ceramic capacitor placed within 2 mm of the pin to suppress supply-noise-induced jitter on the output. The M74VHC1GT50DFT1G draws only 1 µA quiescent current at 25 °C, but switching currents during output transitions can briefly reach several mA; a local decoupling capacitor prevents the part from injecting noise into a shared 3.3 V or 5 V rail.
Do not confuse M74VHC1GT50 (TTL-compatible inputs) with M74VHC1G50 (standard CMOS inputs) - they share the same SC-88A pinout but have different VIL/VIH thresholds. When substituting across these two MPNs, verify that your upstream driver meets the chosen part's input thresholds; otherwise, an edge that swings between 0.8 V and 2.0 V may be misread by the standard-CMOS variant. The 'T' in 'GT50' is the TTL-input designator.
Route input traces away from switching nodes or noisy clock lines to preserve the TTL-compatible input thresholds. The SC-88A/TSOP-5 footprint is small (≈2.0 × 2.1 mm) but exposed-pad variants do not exist - thermal dissipation is limited to the five pins. For driving heavy capacitive loads (>50 pF), place a series damping resistor (22-100 Ω) close to the output to control edge rate and reduce ground bounce.
Estimated: at VCC = 5 V and a 15 pF load, the output rise time is approximately 2-3 ns based on onsemi's typical drive strength. For long PCB traces (>5 cm), model the line as a transmission line and add a series source-termination resistor to prevent reflections. The part's power-down protection on input and output allows signals to be present before VCC, simplifying multi-rail sequencing.
Thông tin tuân thủ
RoHS compliant per onsemi distributor listings (DigiKey, Mouser). Not AEC-Q100 qualified - this is a commercial/industrial grade single-gate logic IC. Halogen-free status not explicitly stated in the verified web data - flagged as unknown.
