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MC74VHC1GT50DTT1G

Single non-inv buffer, VHC, 1.65-5.5V, TTL inputs, 3.5ns@5V, 7V OVT, Ioff, SOT-23-5

9500

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Pieza del fabricante：

MC74VHC1GT50DTT1G

Paquete：

SOT-23-5 / TSOP-5 (3.0 x 1.5 x 1.0mm)

Descripción

Productos

The MC74VHC1GT50DTT1G is a single non-inverting buffer from onsemi with 1.65V to 5.5V supply and TTL-compatible input thresholds (T suffix). The VHC (Very High-Speed CMOS) technology provides 3.5ns propagation delay at 5V while maintaining low CMOS power dissipation. The 7V-tolerant inputs enable level translation from 5V to 3V domains, and the Ioff circuitry supports partial power-down and hot insertion in SOT-23-5/TSOP-5 packaging.

Especificaciones

Logic Function	Single Non-Inverting Buffer (Y = A)
Tensión de alimentación	1.65V to 5.5V (T suffix: 2.0V to 5.5V guaranteed)
Input Threshold	TTL-compatible (T suffix)
Retardo de propagación	3.5ns typ @ 5V; 25.5ns max @ 5V, 50pF
Output Drive	±8mA @ 3V; ±8mA @ 4.5V
Input Voltage Tolerance	Up to 7V (regardless of VCC)
Ioff Support	Yes (partial power-down protection)
Corriente de reposo	1µA max @ 25°C
Output Type	Push-Pull CMOS
ESD Protection	2000V HBM, 1000V CDM
Latch-Up	>100mA
Paquete	SOT-23-5 / TSOP-5 (3.0 x 1.5mm)
Temperatura de funcionamiento	-55°C to +125°C

Características

Single non-inverting buffer in tiny SOT-23-5
VHC high-speed CMOS technology
TTL-compatible input thresholds (T suffix)
3.5ns propagation delay at 5V
7V-tolerant inputs for level translation
Ioff supports partial power-down and hot insertion
±8mA output drive at 3V
1µA max quiescent current
Available in SC-88A, SC-74A, SOT-553, SOT-953, UDFN6

Aplicaciones

Logic level translation (5V to 3V, 3V to 1.8V)
Signal buffering and isolation
Hot insertion signal conditioning
Interface between TTL and CMOS logic
Single-gate logic glue

Introducción del producto:MC74VHC1GT50DTT1G Presentación del producto

The MC74VHC1GT50DTT1G from onsemi is a single non-inverting buffer fabricated with silicon-gate CMOS technology in the VHC (Very High-Speed CMOS) family. The T suffix indicates TTL-compatible input thresholds, enabling the device to accept standard TTL logic levels while producing full CMOS output swings. The 3.5ns typical propagation delay at 5V matches bipolar Schottky TTL speed while consuming CMOS-level power (1µA max ICC). The input protection circuitry tolerates voltages up to 7V regardless of VCC, allowing the device to translate between 5V and 3V logic domains while operating at the higher supply voltage. The Ioff circuitry ensures the output goes high-impedance when VCC is removed, preventing current backflow during hot insertion or partial power-down events. The tiny SOT-23-5 package (3.0 x 1.5mm) occupies minimal board area.

Principio de funcionamiento:MC74VHC1GT50DTT1G Principio de funcionamiento

The MC74VHC1GT50DTT1G implements a single non-inverting buffer using a three-stage CMOS architecture: an input stage with TTL-compatible thresholds, an intermediate gain stage, and a buffered push-pull output stage. The T suffix input stage is designed with a reference voltage that sets VIH at approximately 1.4V (at 3V VCC) and VIL at approximately 0.45V, matching standard TTL switching levels. This allows the device to be driven by TTL outputs with 2.4V VOH and 0.4V VOL while producing a full 0-to-VCC CMOS output swing. The 7V-tolerant input structure uses isolation transistors that prevent input voltages above VCC from forward-biasing parasitic diodes, enabling level translation. The Ioff circuit disconnects the output stage from the input when VCC = 0V, placing the output in a high-impedance state that prevents current from flowing from the input back through the device.

Descripción de la clavija:MC74VHC1GT50DTT1G Definición y funciones de las clavijas

Pin	Nombre	Descripción
1	NC	Sin conexión
2	A	Data input (TTL thresholds)
3	GND	Suelo
4	Y	Data output (Y = A)
5	VCC	Supply voltage (1.65V to 5.5V)

Application Scenarios:In which products and applications isMC74VHC1GT50DTT1G usado

5V TTL to 3.3V CMOS Translation: A 5V TTL device with VOH=2.4V drives the MC74VHC1GT50DTT1G input while the buffer operates at VCC=3.3V. The TTL input threshold accepts the 2.4V signal as a valid high. The output swings 0 to 3.3V with full CMOS levels, cleanly interfacing the 5V TTL device to a 3.3V CMOS system. The 7V-tolerant input allows the 5V signal even though VCC is only 3.3V.
Hot-Swap Signal Buffer: Buffer a signal between a backplane and a plug-in card. When the card is inserted, VCC ramps up and the Ioff circuit ensures the output starts high-impedance, preventing bus contention. Once VCC stabilizes, the buffer actively drives the signal. During hot removal, Ioff immediately isolates the output as VCC drops, protecting the backplane.
Single-Gate Glue Logic: Use as a simple signal buffer when one more gate is needed and adding a full 14-pin quad gate IC would waste board space. The SOT-23-5 package occupies only 4.5mm², far less than the 51mm² of an SOIC-14 quad gate.

Alternative Models:What chips are recommended as replacements for MC74VHC1GT50DTT1G

Modelo	VCC	Input Type	Diferencia clave
MC74VHC1G50DTT1G	1.65-5.5V	CMOS	CMOS input thresholds (no T)
SN74LVC1G34DCKR	1.65-5.5V	CMOS	TI LVC, similar buffer
NC7SZ34P5X	1.65-5.5V	CMOS	Renesas, similar buffer
74AUP1G34GF	0.8-3.6V	CMOS	Nexperia, ultra-low power