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HEF4021B
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 Cel to +85 Cel) and automotive (-40 Cel to +125 Cel) 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 Cel to +125 Cel
- Complies with JEDEC standard JESD 13-B
- ESD protection:
- HBM JESD22-A114E exceeds 2000 V
- MM JESD22-A115-A exceeds 200 V
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| HEF4021BP | HEF4021BPN | 9332 776 30652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | HEF4021BP
| Always Pb-free |
| HEF4021BT | HEF4021BTD | 9333 727 40652 | Volume production | SOT109-1
(SO16) | Bulk Pack, CECC | Standard Marking | HEF4021BT
| week 12, 2005 |
| HEF4021BT | HEF4021BTD-T | 9333 727 40653 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13", CECC | Standard Marking | HEF4021BT
| week 12, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|
| HEF4021BP | 9332 776 30652 | 0.2600 | ASIA | WPI | 3,000 | 1000 | 01/07/2009 | Buy online | Order samples |
| NA | ARROW ELECTRONICS | 275 | 1/6/2009 | Buy online | |||||
| NA | DIGI-KEY CORPORATION | 1,871 | 1/6/2009 | Buy online | |||||
| NA | FUTURE ELECTRONICS | 2,040 | 1/7/2009 | Buy online | |||||
| NA | MOUSER ELECTRONICS | 2,997 | 1/7/2009 | Buy online | |||||
| HEF4021BT | 9333 727 40652 | 0.2300 | NA | DIGI-KEY CORPORATION | 597 | 1/6/2009 | Buy online | not available | |
| NA | FUTURE ELECTRONICS | 2,220 | 1/7/2009 | Buy online | |||||
| HEF4021BT | 9333 727 40653 | 0.2300 | ASIA | SACL - Hong Kong/China | yes | 2500 | 01/08/2009 | Buy online | Order samples |
| NA | FUTURE ELECTRONICS | 4,000 | 1/7/2009 | Buy online | |||||
| NA | MOUSER ELECTRONICS | 2,750 | 1/7/2009 | 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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HEF4021B
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