Overview
The CD74HCT165M96G4 is a high-speed CMOS logic 8-bit parallel or serial-in shift register produced by Texas Instruments. This component is part of the HCT series, which is designed for direct LSTTL input logic compatibility. It features buffered inputs, asynchronous parallel load, and complementary serial outputs, making it versatile for various digital circuit applications.
The device operates over a wide temperature range of -55°C to 125°C and is available in a SOIC (Small Outline Integrated Circuit) package. The CD74HCT165M96G4 is suitable for systems requiring high noise immunity and significant power reduction compared to traditional LSTTL logic ICs.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 5.5 | V | ||
| VIH High Level Input Voltage | VCC = 5V | 2 | V | ||
| VIL Low Level Input Voltage | VCC = 5V | 0.8 | V | ||
| VOH High Level Output Voltage | IOH = -20 μA | 4.4 | V | ||
| VOL Low Level Output Voltage | IOL = 20 μA | 0.1 | V | ||
| tWL, tWH CLK Pulse Width | VCC = 5V | 16 | 20 | 24 | ns |
| tSU Set-up Time SER to CLK | VCC = 5V | 16 | 20 | 24 | ns |
| fMAX Maximum Clock Pulse Frequency | VCC = 5V, CL = 50pF | 27 | MHz | ||
| TJ Junction Temperature | 150 | °C | |||
| Tstg Storage Temperature | -65 | 150 | °C |
Key Features
- Buffered inputs
- Asynchronous parallel load
- Complementary serial outputs (QH and Q̄H)
- Fanout (over temperature range): Standard outputs support 10 LSTTL loads, bus driver outputs support 15 LSTTL loads
- Wide operating temperature range: -55°C to 125°C
- Balanced propagation delay and transition times
- Significant power reduction compared to LSTTL logic ICs
- Direct LSTTL input logic compatibility: VIL = 0.8 V (Max), VIH = 2 V (Min) at VCC = 5V
- CMOS input compatibility: II ≤ 1 μA at VOL, VOH
Applications
The CD74HCT165M96G4 is suitable for a variety of applications, including:
- Parallel-to-serial conversion in digital systems
- Serial data transmission and reception
- Shift register applications in microcontrollers and embedded systems
- Data storage and retrieval in digital circuits
- Interface circuits requiring high noise immunity and low power consumption
Q & A
- What is the operating voltage range for the CD74HCT165M96G4?
The operating voltage range for the CD74HCT165M96G4 is 4.5V to 5.5V.
- What is the maximum clock frequency for the CD74HCT165M96G4?
The maximum clock frequency is approximately 27 MHz at VCC = 5V and CL = 50pF.
- What is the fanout capability of the CD74HCT165M96G4?
The standard outputs can drive up to 10 LSTTL loads, and the bus driver outputs can drive up to 15 LSTTL loads.
- What is the temperature range for the CD74HCT165M96G4?
The device operates over a temperature range of -55°C to 125°C.
- How does the parallel load function work on the CD74HCT165M96G4?
When the parallel load (SH/LD) input is LOW, parallel data from the A to H inputs are loaded into the register asynchronously.
- What is the significance of the complementary serial outputs (QH and Q̄H)?
The complementary serial outputs allow for easy expansion of parallel-to-serial converters by connecting the QH output to the SER input of the succeeding device.
- How does the device handle clock and clock inhibit inputs?
The LOW-to-HIGH transition of CLK INH should only take place while CLK is HIGH, and CLK and CLK INH should be LOW before the LOW-to-HIGH transition of SH/LD to prevent shifting the data when SH/LD goes HIGH.
- What is the package type for the CD74HCT165M96G4?
The device is available in a SOIC (Small Outline Integrated Circuit) package.
- What are the key electrical characteristics of the CD74HCT165M96G4?
Key characteristics include high level input voltage (VIH), low level input voltage (VIL), high level output voltage (VOH), and low level output voltage (VOL), among others.
- How does the CD74HCT165M96G4 compare to LSTTL logic ICs in terms of power consumption?
The CD74HCT165M96G4 offers significant power reduction compared to traditional LSTTL logic ICs.
- What are some common applications for the CD74HCT165M96G4?
Common applications include parallel-to-serial conversion, serial data transmission, shift register applications, and interface circuits requiring high noise immunity.
