HEF4543BT: BCD to 7-segment latch/decoder/driver
The HEF4543B is a BCD to 7-segment latch/decoder/driver for liquid crystal and LED
displays. It has four address inputs (D0 to D3), an active LOW latch enable input (LE), an
active HIGH blanking input (BL), an active HIGH phase input (PH) and seven buffered
segment outputs (Qa to Qg).
The circuit provides the function of a 4-bit storage latch and an 8-4-2-1 BCD to 7-segment
decoder/driver. It can invert the logic levels of the output combination. The phase (PH),
blanking (BL) and latch enable (LE) inputs are used to reverse the function table phase,
blank the display and store a BCD code, respectively.
For liquid crystal displays, a square-wave is applied to PH and the electrical common
back-plane of the display. The outputs of the device are directly connected to the
segments of the liquid crystal.
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.
HEF4543BT: Product Block Diagram
sot109-1_3d
Data Sheets (1)
Application Notes (1)
Brochures (2)
Package Information (1)
Supporting Information (2)
Ordering Information
| Product | Status | Family | Function | VCC (V) | 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 |
|---|
| HEF4543BT | Active | HEF4000B | Decoders/demultiplexers | 4.5 - 15 | BCD to 7-segment latch/decoder/driver with phase input | CMOS | +/- 2.4 | SOT109-1 | 55 | medium | -40~85 | 74 | 1.4 | 32 | 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 |
|---|
| HEF4543BT | | SOT109-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE
SO-SOJ-REFLOW
SO-SOJ-WAVE | Reel 13" Q1/T1 CECC | Active | HEF4543BT,653
(9333 733 00653) | HEF4543BT | HEF4543BT |    | week 6, 2004 | 75.3 | 2.99 | 3.34E8 | 1 | 1 |
| Bulk Pack, CECC | Active | HEF4543BT,652
(9333 733 00652) | HEF4543BT | HEF4543BT | | week 6, 2004 | 75.3 | 2.99 | 3.34E8 | 1 | 1 |
