Overview
The MC74HC125ADR2 is a quad 3-state noninverting buffer integrated circuit produced by onsemi. This device is part of the HC series, known for its high-performance silicon-gate CMOS technology. It is designed to be used in various bus-oriented systems, including 3-state memory address drivers, clock drivers, and other applications requiring high-speed buffering.
The MC74HC125ADR2 is identical in pinout to the LS125 and LS126, making it a compatible replacement in many existing designs. The device inputs are compatible with standard CMOS outputs and, with pull-up resistors, can also be used with LSTTL outputs. The MC74HCT125A version of this device is specifically compatible with Standard CMOS or TTL outputs.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| DC Supply Voltage (VCC) | –0.5 to +6.5 | V | |
| DC Input Voltage (VIN) | –0.5 to VCC + 0.5 | V | |
| DC Output Voltage (VOUT) | –0.5 to VCC + 0.5 | V | |
| Maximum High-Level Input Voltage (VIH) | 2.0 to 6.0 | V | Vout = VCC – 0.1 V, |Iout| ≤ 20 μA |
| Maximum Low-Level Input Voltage (VIL) | 0.5 to 1.8 | V | Vout = 0.1 V, |Iout| ≤ 20 μA |
| Minimum High-Level Output Voltage (VOH) | 1.9 to 5.9 | V | Vin = VIH or VIL, |Iout| ≤ 20 μA |
| Maximum Low-Level Output Voltage (VOL) | 0.1 | V | Vin = VIH or VIL, |Iout| ≤ 20 μA |
| Maximum Propagation Delay (tPLH, tPHL) | 18 to 90 | ns | VCC = 2.0 to 6.0 V |
| Operating Free-Air Temperature (TA) | –55 to +125 | °C | |
| Storage Temperature (TSTG) | –65 to +150 | °C |
Key Features
- High-performance silicon-gate CMOS technology.
- Quad 3-state noninverting buffers with active-low output enables (MC74HC125A).
- Inputs compatible with standard CMOS outputs and LSTTL outputs with pull-up resistors.
- Output drive capability: up to 15 LSTTL loads.
- Maximum propagation delay of 18 to 90 ns depending on VCC.
- Operating voltage range: 2.0 to 6.0 V.
- Operating temperature range: –55 to +125 °C.
- Available in SOIC-14 and TSSOP-14 packages.
Applications
- 3-state memory address drivers.
- Clock drivers.
- Bus-oriented systems.
- High-speed buffering applications.
- General-purpose logic circuits requiring 3-state outputs.
Q & A
- What is the MC74HC125ADR2 used for?
The MC74HC125ADR2 is used as a quad 3-state noninverting buffer in various bus-oriented systems, including 3-state memory address drivers, clock drivers, and other high-speed buffering applications.
- What are the input voltage compatibility of the MC74HC125ADR2?
The inputs are compatible with standard CMOS outputs and, with pull-up resistors, can also be used with LSTTL outputs. The MC74HCT125A version is specifically compatible with Standard CMOS or TTL outputs.
- What is the output drive capability of the MC74HC125ADR2?
The output drive capability is up to 15 LSTTL loads.
- What is the operating voltage range of the MC74HC125ADR2?
The operating voltage range is 2.0 to 6.0 V.
- What is the maximum propagation delay of the MC74HC125ADR2?
The maximum propagation delay is 18 to 90 ns depending on the VCC voltage.
- What are the available packages for the MC74HC125ADR2?
The device is available in SOIC-14 and TSSOP-14 packages.
- What is the operating temperature range of the MC74HC125ADR2?
The operating temperature range is –55 to +125 °C.
- How many buffers does the MC74HC125ADR2 contain?
The MC74HC125ADR2 contains four separate 3-state noninverting buffers.
- What is the purpose of the output enables in the MC74HC125ADR2?
The output enables are used to control the output states of the buffers, with the MC74HC125A having active-low output enables.
- What are the storage temperature limits for the MC74HC125ADR2?
The storage temperature limits are –65 to +150 °C.
