HEF4028BT: BCD to decimal decoder
The HEF4028B is a 4-bit BCD to decimal decoder, a 4-bit BCO to octal decoder with active LOW enable or an 8-output (Y0 to Y7) inverting demultiplexer. The outputs are fully buffered for best performance.
When used as a BCD to decimal decoder a 1-2-4-8 BCD code applied to inputs A0 to A3 causes the selected output to be HIGH. The other nine outputs will be LOW.
To use the HEF4028B as a BCO to octal decoder, input A3 is an active LOW enable pin and outputs Y8 and Y9 are not used. A 1-2-4 BCO code applied to inputs A0 to A2 causes the selected output (Y0 to Y7) to be HIGH. The other seven outputs will be LOW. When A3 is HIGH outputs (Y0 to Y7) will be forced LOW.
When used as an 8-output (Y0 to Y7) inverting demultiplexer A0 to A2 are used as address inputs and A3 is the data input. Outputs Y8 and Y9 are not used.
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.
HEF4028BT: Product Block Diagram
sot109-1_3d
Data Sheets (1)
| Name/Description | Modified Date |
|---|---|
| BCD to decimal decoder (REV 9.0) PDF (131.0 kB) HEF4028B [English] | 23 Mar 2016 |
Application Notes (1)
| Name/Description | Modified Date |
|---|---|
| Pin FMEA HEF4000 family (REV 2.0) PDF (30.0 kB) AN11051 [English] | 21 Aug 2015 |
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 small outline package; 16 leads; body width 3.9 mm (REV 1.0) PDF (192.0 kB) SOT109-1 [English] | 08 Feb 2016 |
Supporting Information (2)
| Name/Description | Modified Date |
|---|---|
| Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW [English] | 08 Oct 2009 |
| Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE [English] | 08 Oct 2009 |
Ordering Information
| Product | Status | Family | VCC (V) | Function | Description | Logic switching levels | Output drive capability (mA) | Package version | tpd (ns) | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HEF4028BT | Active | HEF4000B | 4.5 - 15 | Decoders/demultiplexers | 1-of-10 Decoder | CMOS | +/- 2.4 | SOT109-1 | 30 | medium | -40~85 | 82 | 5.2 | 41.2 | SO16 | 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 | EFR | IFR(FIT) | MTBF(hour) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HEF4028BT | | SOT109-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE | Reel 13" Q1/T1 CECC | Active | HEF4028BT,653 (9333 728 00653) | HEF4028BT | HEF4028BT |    | week 6, 2004 | 75.3 | 2.99 | 3.34E8 | 1 | 1 |
| Bulk Pack, CECC | Active | HEF4028BT,652 (9333 728 00652) | HEF4028BT | HEF4028BT | | week 6, 2004 | 75.3 | 2.99 | 3.34E8 | 1 | 1 |
- BCD to decimal decoder HEF4028BT
- Pin FMEA HEF4000 family HEF4894B_Q100
- 電圧レベルシフタ 74AVC16245DGG-Q100
- Voltage translation: How to manage mixed-voltage designs with NXP® level translators 74AVC16245DGG-Q100
- plastic small outline package; 16 leads; body width 3.9 mm NPIC6C596A_Q100
- Footprint for reflow soldering NPIC6C596A_Q100
- Footprint for wave soldering NPIC6C596A_Q100
- HEF4028B
- SA614A
