Overview
The 74AHC74D,112 is a dual D-type flip-flop integrated circuit produced by NXP Semiconductors. This high-speed Si-gate CMOS device is designed to be pin compatible with Low-Power Schottky TTL (LSTTL) and is specified in compliance with JEDEC standard No. 7-A. The device features positive-edge triggered D-type flip-flops with individual data inputs (D), clock inputs (CP), set inputs (SD), and reset inputs (RD), along with complementary outputs (Q and Q).
Key Specifications
| Parameter | Conditions | Min | Typ | Max |
|---|---|---|---|---|
| Propagation Delay (nCP to nQ, nQ) | VCC = 3.0 V to 3.6 V, CL = 15 pF | 1.0 ns | 5.2 ns | 11.9 ns |
| Propagation Delay (nCP to nQ, nQ) | VCC = 3.0 V to 3.6 V, CL = 50 pF | 1.0 ns | 7.4 ns | 15.4 ns |
| Propagation Delay (nCP to nQ, nQ) | VCC = 4.5 V to 5.5 V, CL = 15 pF | 1.0 ns | 3.7 ns | 7.3 ns |
| Propagation Delay (nCP to nQ, nQ) | VCC = 4.5 V to 5.5 V, CL = 50 pF | 1.0 ns | 5.2 ns | 9.3 ns |
| Input Leakage Current | VI = 5.5 V or GND; VCC = 0 V to 5.5 V | - | - | 2.0 μA |
| Supply Current | VI = VCC or GND; IO = 0 A; VCC = 5.5 V | - | - | 40 μA |
| Input Capacitance | VI = VCC or GND | - | 10 pF | - |
| HIGH-level Input Voltage | VCC = 4.5 V to 5.5 V | 2.0 V | - | - |
| LOW-level Input Voltage | VCC = 4.5 V to 5.5 V | - | - | 0.8 V |
| HIGH-level Output Voltage | VI = VIH or VIL; VCC = 4.5 V; IO = -50 μA | 4.4 V | - | - |
| LOW-level Output Voltage | VI = VIH or VIL; VCC = 4.5 V; IO = 50 μA | - | - | 0.1 V |
Key Features
- Positive-edge triggered D-type flip-flops with individual data inputs (D), clock inputs (CP), set inputs (SD), and reset inputs (RD), along with complementary outputs (Q and Q).
- Asynchronous active LOW set and reset inputs that operate independent of the clock input.
- Schmitt-trigger action in the clock input for tolerance to slower clock rise and fall times.
- Inputs accept voltages higher than VCC.
- CMOS level inputs for 74AHC74 and TTL level inputs for 74AHCT74.
- ESD protection: HBM EIA/JESD22-A114E exceeds 2000 V, MM EIA/JESD22-A115-A exceeds 200 V, CDM EIA/JESD22-C101C exceeds 1000 V.
- Multiple package options.
- Specified from -40°C to +85°C and from -40°C to +125°C.
- Balanced propagation delays.
Applications
The 74AHC74D,112 is suitable for a variety of digital circuit applications, including:
- Sequential logic circuits.
- Counters and timers.
- Memory elements in digital systems.
- Interface circuits requiring data storage and synchronization.
- General-purpose digital signal processing.
Q & A
- What is the 74AHC74D,112?
The 74AHC74D,112 is a dual D-type flip-flop integrated circuit produced by NXP Semiconductors. - What are the key inputs and outputs of the 74AHC74D,112?
The device features individual data inputs (D), clock inputs (CP), set inputs (SD), and reset inputs (RD), along with complementary outputs (Q and Q). - How do the set and reset inputs operate?
The set and reset inputs are asynchronous active LOW inputs that operate independent of the clock input. - What is the significance of Schmitt-trigger action in the clock input?
Schmitt-trigger action in the clock input makes the circuit highly tolerant to slower clock rise and fall times. - What are the input voltage levels for the 74AHC74 and 74AHCT74?
The 74AHC74 has CMOS level inputs, while the 74AHCT74 has TTL level inputs. - What is the ESD protection level for the 74AHC74D,112?
The device has ESD protection: HBM EIA/JESD22-A114E exceeds 2000 V, MM EIA/JESD22-A115-A exceeds 200 V, CDM EIA/JESD22-C101C exceeds 1000 V. - What are the operating temperature ranges for the 74AHC74D,112?
The device is specified from -40°C to +85°C and from -40°C to +125°C. - What are some common applications of the 74AHC74D,112?
It is used in sequential logic circuits, counters and timers, memory elements in digital systems, interface circuits, and general-purpose digital signal processing. - What package options are available for the 74AHC74D,112?
The device is available in multiple package options, including 14-SOIC. - Is the 74AHC74D,112 still in production?
No, this product is no longer manufactured, but it may still be available from some distributors or through obsolete inventory.
