HEF4021BTT: 8-bit static shift register
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.
Outline 3d SOT403-1
Data Sheets (1)
| Name/Description | Modified Date |
|---|---|
| 8-bit static shift register (REV 10.0) PDF (159.0 kB) HEF4021B [English] | 21 Mar 2016 |
Brochures (2)
| Name/Description | Modified Date |
|---|---|
| 電圧レベルシフタ (REV 1.1) PDF (3.1 MB) 75017511_JP [English] | 16 Feb 2015 |
| Voltage translation: How to manage mixed-voltage designs with NXP® level translators (REV 1.0) PDF (2.6 MB) 75017511 [English] | 20 May 2014 |
Package Information (1)
| Name/Description | Modified Date |
|---|---|
| plastic thin shrink small outline package; 16 leads; body width 4.4 mm (REV 1.0) PDF (300.0 kB) SOT403-1 [English] | 08 Feb 2016 |
Packing (1)
| Name/Description | Modified Date |
|---|---|
| TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (218.0 kB) SOT403-1_118 [English] | 08 Apr 2013 |
Supporting Information (1)
| Name/Description | Modified Date |
|---|---|
| Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE [English] | 08 Oct 2009 |
Ordering Information
| Product | Status | Family | Function | VCC (V) | Logic switching levels | Description | Package version | Output drive capability (mA) | tpd (ns) | fmax (MHz) | No of bits | Power dissipation considerations | Tamb (Cel) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name | No of pins |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HEF4021BTT | Active | HEF4000B | Shift registers | 4.5 - 15.5 | CMOS | 8-bit shift register with asynchronous parallel load | SOT403-1 | +/- 2.4 | 40 | 40 | 8 | medium | -40~85 | 121 | 3.8 | 50.9 | TSSOP16 | 16 |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HEF4021BTT | | SOT403-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | HEF4021BTTJ (9353 024 48118) | Standard Marking | HEF4021BTT |    | Always Pb-free | 1 | 1 |
- 8-bit static shift register HEF4021BTT
- 電圧レベルシフタ 74AVC16245DGG-Q100
- Voltage translation: How to manage mixed-voltage designs with NXP® level translators 74AVC16245DGG-Q100
- SOT403-1 LPC812M101JDH16
- SSOP-TSSOP-VSO-WAVE LPC1114FDH28
- Reel 13" Q1/T1 LPC812M101JDH16
- PCA9633
