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HEF4021B.pdf
Datasheet
General description
The HEF4021B is an 8-bit static shift register (parallel-to-serial converter) with a synchronous serial data input (DS), a clock input (CP), an asynchronous active HIGH parallel load input (PL), eight asynchronous parallel data inputs (D0 to D7) and buffered parallel outputs from the last three stages (Q5 to Q7).
Each register stage is a D-type master-slave flip-flop with a set direct (SD) and clear direct (CD) input. Information on D0 to D7 is asynchronously loaded into the register while PL is HIGH, independent of CP and DS. When PL is LOW, data on DS is shifted into the first register position and all the data in the register is shifted one position to the right on the LOW-to-HIGH transition of CP. Schmitt trigger action makes the clock input highly tolerant of slower rise and fall times.
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS, or another input. It is also suitable for use over both the industrial (-40 °C to +85 °C) and automotive (-40 °C to +125 °C) temperature ranges.
Features
- Tolerant of slower rise and fall times
- Fully static operation
- 5 V, 10 V, and 15 V parametric ratings
- Standardized symmetrical output characteristics
- Operates across the automotive temperature range -40 °C to +125 °C
- Complies with JEDEC standard JESD 13-B
Products/packages
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| HEF4021BP | HEF4021BP,652 | 9332 776 30652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | |
| HEF4021BT | HEF4021BT,652 | 9333 727 40652 | Volume production | SOT109-1
(SO16) | Bulk Pack, CECC | Standard Marking | |
| HEF4021BT | HEF4021BT,653 | 9333 727 40653 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13", CECC | Standard Marking |
Quality/reliability/chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL Lead-free |
|---|---|---|---|---|---|---|---|---|
| HEF4021BP | HEF4021BP,652 | HEF4021BP |
| Always Pb-free | 2,99 | 3,34E+08 | NA | |
| HEF4021BT | HEF4021BT,652 | HEF4021BT |
| week 12, 2005 | 2,99 | 3,34E+08 | 1 | |
| HEF4021BT | HEF4021BT,653 | HEF4021BT |
| week 12, 2005 | 2,99 | 3,34E+08 | 1 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| HEF4021BP | 9332 776 30652 | HEF4021BP,652 | 0.2600 | NA | NEWARK | 1,511 | 3/18/2010 | Buy online | Order samples | |
| NA | ARROW ELECTRONICS | 652 | 3/18/2010 | Buy online | ||||||
| EU | FARNELL | 1,616 | 3/18/2010 | Buy online | ||||||
| NA | DIGI-KEY CORPORATION | 3,262 | 3/18/2010 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 12,578 | 3/17/2010 | Buy online | ||||||
| JAPAN | CHIP ONE STOP | yes | 03/19/2010 | Buy online | ||||||
| HEF4021BT | 9333 727 40652 | HEF4021BT,652 | 0.2300 | NA | ARROW ELECTRONICS | 653 | 3/18/2010 | Buy online | not available | |
| NA | DIGI-KEY CORPORATION | 7 | 3/18/2010 | Buy online | ||||||
| JAPAN | CHIP ONE STOP | no | 03/19/2010 | Buy online | ||||||
| HEF4021BT | 9333 727 40653 | HEF4021BT,653 | 0.2300 | NA | ARROW ELECTRONICS | 653 | 3/18/2010 | Buy online | Order samples | |
| NA | FUTURE ELECTRONICS | 2,485 | 3/17/2010 | Buy online | ||||||
| ASIA | SAC - Taiwan | yes | 2500 | 03/19/2010 | Buy online | |||||
| JAPAN | CHIP ONE STOP | yes | 03/19/2010 | Buy online |
Parametrics/similar products
| Type number | Package | Description | Fmax(MHz) | Propagation Delay(ns) | Voltage | No. of Pins | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|---|
| HEF4021BP | SOT38-4
(DIP16) | 8-Bit Static Shift Register with Asynchronous Parallel Load Input | 40 @ 15 V | 40@15V | 4.5-15.5 V | 16 | Low Power or Automotive Applications | CMOS | +/- 2.4 mA @ 15 V |
| HEF4021BT | SOT109-1
(SO16) | 8-Bit Static Shift Register with Asynchronous Parallel Load Input | 40 @ 15 V | 40@15V | 4.5-15.5 V | 16 | Low Power or Automotive Applications | CMOS | +/- 2.4 mA @ 15 V |
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