MIC8030 查看數據表（PDF） - Micrel

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产品描述 (功能)

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MIC8030

High-Voltage Display Driver

Micrel 

MIC8030

Pin Configuration

Seg 26 7

Seg 27 8

Seg 28 9

Seg 29 10

Seg 30 11

Seg 31 12

Seg 32 13

VSS 14

Chip Select 15

Clock 16

Load 17

MIC8030-01

39 Seg 17

38 Seg 16

37 Seg 15

36 VBB

35 Seg 14

34 Seg 13

33 Seg 12

32 Seg 11

31 Seg 10

30 Seg 9

29 Seg 8

44-Pin PLCC (-V)

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Functional Description

With CHIP SELECT tied low, serial data is clocked into the For displays with more than 38 segments, two or more

shift register at each falling edge of the CLOCK input. Pulling MIC8030 may be cascaded by connecting DATA OUT of the

8

LOAD high will cause a parallel loading of the shift register previous stage with DATA IN of the next stage; CLOCK,

contents into the latches. If load is left high, the latches are LOAD and CHIP SELECT of all following stages should be

transparent.

tied to the control lines of the first MIC8030. The backplane

A logic “1” clocked into the shift register corresponds to that

segment being on, and that segment is out of phase with the

backplane.

output of the first stage should be tied to LCDφ of all following

stages, the LCDφ OPT must be left unconnected on those

stages. If the internal oscillator is used, and VBB > 50V then

an external 330 kΩ resistor must be used between the

The backplane may be externally driven or the internal BACKPLANE of the first stage and LCDφ of all following

oscillator can be used. If LCDφ is externally driven, the stages.

backplane will be in phase with the input; LCDφ OPT is not

connected. The internal oscillator is used by shorting LCDφ

OPT to LCDφ, connecting a capacitor to ground, and a

resistor to VCC. The frequency of the backplane will be 1/256

of the input frequency, and is given as: f = 10/[R(C + .0002)]

at VDD = 5V, R in kΩ, C in µF.

Packaging options available include DATA OUT 30, 32 or 38

with the corresponding number of segments, and the avail-

ability of LCDφ OPT. Types of packages include plastic and

ceramic DIPs, surface mount packages, plastic and ceramic

Leadless Chip Carriers and custom packaging.

Example: R = 150 kΩ, C = 420 pF: f = 108 Hz

October 1998

8-17

MIC8030

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