MSC7171 Datasheet, PDF (3/7 Pages) OKI electronic componets – 12-Bit Grid Driver

¡ Semiconductor
PIN CONFIGURATION (TOP VIEW)
CLOCK 1
DATA 2
STANDBY ³
V_SS 4
NC 5
GRID 1 6
GRID 2 7
GRID 3 8
GRID 4 9
NC 10
GRID 5 11
GRID 6 12
24 DUTY
23 V_DD
22 _NC
21 V_DISP
20 NC
19 GRID 12
18 GRID 11
17 GRID 10
16 GRID 9
15 NC
14 GRID 8
13 GRID 7
NC: No-connection pin
24-Pin Plastic SOP
MSC7171
PIN DESCRIPTIONS
Symbol Type
Description
CLOCK
I Clock input of shift register.
Data is clocked in this pin through DATA pin while this pin is at a "L" level.
The data is shifted on the rising edge of the shift clock pulse.
DATA
I Serial data input into the shift register.
STANDBY
I Standby signal input
By setting this pin to "H", all driver outputs go "L" and the IC enters the low
current mode.
V_SS
GRID1 to 12
— Ground.
O High-withstand voltage driver output pins for driving vacuum fluorescent (VF)
display tube. These pins can be connected directly to the grids of the VF display
tube. No pull-down resistor is required.
V_DISP
V_DD
DUTY
— VF display tube driver power supply.
— Logic power supply.
I Duty control signal input.
When this pin is set to "L", all driver outputs go "L", allowing this pin to be used for
brightness control.
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