Overview
The HCF4021BEY is a monolithic integrated circuit fabricated in metal oxide semiconductor technology, produced by STMicroelectronics. This device is an 8-stage parallel or serial-input/serial-output register, featuring common clock and parallel/serial control inputs, a single serial data input, and individual parallel 'jam' inputs to each register stage. Each register stage is a D-type, master-slave flip-flop, with buffered outputs available from stages 6, 7, and 8. The device supports both asynchronous parallel input and synchronous serial-in/serial-out operations, controlled by the parallel/serial control input.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 3 to 20 | V |
| Operating Temperature | -55 to +125 | °C |
| Clock Input Frequency | Up to 12 MHz (typ. at VDD = 10 V) | MHz |
| Propagation Delay Time | 80 to 320 ns (depending on VDD) | ns |
| Transition Time | 40 to 200 ns (depending on VDD) | ns |
| Quiescent Current (IL) | 0.04 to 600 μA (depending on VDD) | μA |
| High-Level Output Voltage (VOH) | 4.95 to 14.95 V (depending on VDD) | V |
| Low-Level Output Voltage (VOL) | 0.05 V | V |
| Package Type | PDIP-16 | - |
| ESD Performance | CDM: 1 kV, HBM: 2 kV, MM: 200 V | - |
Key Features
- Medium speed operation: up to 12 MHz clock rate at VDD = 10 V
- Fully static operation
- 8 master-slave flip-flops plus output buffering and control gating
- Quiescent current specified up to 20 V
- 5 V, 10 V, and 15 V parametric ratings
- Input leakage current II = 100 nA (max.) at VDD = 18 V, TA = 25 °C
- 100% tested for quiescent current
- ESD performance: CDM 1 kV, HBM 2 kV, MM 200 V
Applications
- Automotive
- Industrial
- Computer
- Consumer electronics
Q & A
- What is the HCF4021BEY used for?
The HCF4021BEY is used as an 8-stage parallel or serial-input/serial-output register in various electronic systems, including automotive, industrial, computer, and consumer electronics.
- What are the operating voltage and temperature ranges for the HCF4021BEY?
The operating voltage range is 3 to 20 V, and the operating temperature range is -55 to +125 °C.
- What is the maximum clock input frequency for the HCF4021BEY?
The maximum clock input frequency is up to 12 MHz at VDD = 10 V.
- What types of packages are available for the HCF4021BEY?
The device is available in PDIP-16 and SO-16 packages.
- What is the quiescent current specification for the HCF4021BEY?
The quiescent current (IL) ranges from 0.04 to 600 μA depending on the supply voltage (VDD).
- Does the HCF4021BEY have ESD protection?
- How does the parallel/serial control input work?
The parallel/serial control input determines whether data is entered serially or in parallel. When low, data is serially shifted; when high, data is jammed into the register via parallel inputs.
- What are the propagation delay and transition times for the HCF4021BEY?
The propagation delay time ranges from 80 to 320 ns, and the transition time ranges from 40 to 200 ns, depending on the supply voltage.
- Can the HCF4021BEY be used in automotive applications?
- What is the storage temperature range for the HCF4021BEY?
The storage temperature range is -65 to +150 °C.
