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M74HCT125TTR
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Product Detailed Parameters
- Description：IC BUF NON-INVERT 5.5V 14TSSOP
- Series：74HCT
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Logic Type：Buffer, Non-Inverting
- Number of Elements：4
- Number of Bits per Element：1
- Input Type：-
- Output Type：3-State
- Current - Output High, Low：6mA, 6mA
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：14-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：14-TSSOP
- Grade：-
- Qualification：-
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Overview
The M74HCT125TTR is a quad bus buffer with three-state outputs manufactured by STMicroelectronics. It operates within a supply voltage range of 4.5V to 5.5V and features high-speed performance with a typical propagation delay of 13ns at VCC = 4.5V. The device provides symmetrical output impedance with minimum currents of 6mA for both high and low states. It includes balanced propagation delays, low power dissipation with a maximum quiescent current of 4μA, and TTL-compatible input thresholds (VIH min 2V, VIL max 0.8V). Packaged in a 14-TSSOP format, it supports an operating temperature range from -55°C to 125°C.
Feature Summary
- High-speed CMOS technology enabling direct interfacing between HSC2MOS systems and TTL or NMOS components.
- Three-state control functionality allowing outputs to enter a high-impedance state when the enable input is set high.
- Integrated protection circuits on all inputs designed to withstand static discharge and transient excess voltage.
Applications
- Buffering signals in high-speed CMOS logic systems.
- Driving bus lines requiring three-state isolation capabilities.
- Interfacing digital systems with TTL or NMOS component standards.
Procurement Notes
Verify component authenticity through authorized channels as this part number is marked obsolete. Confirm that replacement alternatives meet the required electrical specifications, specifically the 4.5V to 5.5V supply range and 14-TSSOP package dimensions. Ensure environmental compliance requirements align with RoHS3 standards before finalizing procurement decisions.
Selection Notes
Select this component for applications requiring robust buffering with defined three-state control. The wide operating temperature range suits industrial environments. Verify that the load capacitance does not exceed recommended limits to maintain specified propagation delays. Consider pin compatibility with existing 74 series 125 designs during integration planning.
Part Context
This device belongs to the 74HCT logic family, utilizing silicon gate C2MOS technology. It serves as a quad buffer designed for high-speed digital signal processing. The TSSOP variant offers surface-mount convenience while maintaining functional equivalence to through-hole DIP versions within the same logical family.
Replacement Considerations
Public confirmed substitute part numbers include 74HCT125PW,118 from Nexperia USA Inc., 74HCT125T14-13 from Diodes Incorporated, and MC74HCT125ADTR2G-Q from onsemi.
FAQ
How is the three-state control activated?
The three-state control input G must be set high to place the output into the high-impedance state.
What are the input voltage thresholds?
The device is compatible with TTL outputs, featuring a minimum high-level input voltage (VIH) of 2V and a maximum low-level input voltage (VIL) of 0.8V.
