A6811KA データシートの表示（PDF） - Allegro MicroSystems

部品番号

コンポーネント説明

メーカー

A6811KA

DABiC-IV, 32-BIT SERIAL-INPUT, LATCHED SOURCE DRIVER

Allegro MicroSystems 

6818

A6818xA

LOAD

SUPPLY

1

VBB

SERIAL

DATA OUT

2

OUT32 3

OUT31 4

OUT30 5

OUT 29 6

OUT 28 7

OUT27 8

OUT26 9

OUT25 10

OUT24 11

OUT23 12

OUT 22 13

OUT 21 14

OUT20 15

OUT 19 16

OUT 18 17

OUT17 18

BLANKING 19 BLNK

GROUND 20

VDD

40

LOGIC

SUPPLY

39

SERIAL

DATA IN

38 OUT 1

37 OUT 2

36 OUT 3

35 OUT 4

34 OUT5

33 OUT 6

32 OUT7

31 OUT8

30 OUT9

29 OUT 10

28 OUT 11

27 OUT 12

26 OUT 13

25 OUT 14

24 OUT 15

23 OUT 16

ST 22 STROBE

CLK 21 CLOCK

Dwg. PP-029-4

ABSOLUTE MAXIMUM RATINGS

at TA = 25°C

Logic Supply Voltage, VDD ................... 7.0 V

Driver Supply Voltage, VBB ................... 60 V

Continuous Output Current Range,

IOUT ......................... -40 mA to +15 mA

Input Voltage Range,

VIN ....................... -0.3 V to VDD + 0.3 V

Package Power Dissipation,

PD ........................................ See Graph

Operating Temperature Range, TA

(Suffix ‘E–’) .................. -40°C to +85°C

(Suffix ‘K–’) ................ -40°C to +125°C

(Suffix ‘S–’) .................. -20°C to +85°C

Storage Temperature Range,

TS ............................... -55°C to +125°C

Caution: These CMOS devices have input static

protection (Class 2) but are still susceptible to

damage if exposed to extremely high static

electrical charges.

DABiC-IV, 32-BIT SERIAL-INPUT,

LATCHED SOURCE DRIVER

The A6818– devices combine a 32-bit CMOS shift register, accom-

panying data latches and control circuitry with bipolar sourcing outputs

and pnp active pull downs. Designed primarily to drive vacuum-

fluorescent displays, the 60 V and -40 mA output ratings also allow

these devices to be used in many other peripheral power driver

applications. The A6818– features an increased data input rate

(compared with the older UCN/UCQ5818–F) and a controlled output

slew rate.

The CMOS shift register and latches allow direct interfacing with

microprocessor-based systems. With a 3.3 V or 5 V logic supply,

typical serial-data input rates are up to 33 MHz.

A CMOS serial data output permits cascade connections in

applications requiring additional drive lines. Similar devices are avail-

able as the A6809– and A6810– (10 bits), A6811– (12 bits), and

A6812– (20 bits).

The A6818– output source drivers are npn Darlingtons, capable of

sourcing up to 40 mA. The controlled output slew rate reduces electro-

magnetic noise, which is an important consideration in systems that

include telecommunications and/or microprocessors and to meet

government emissions regulations. For inter-digit blanking, all output

drivers can be disabled and all sink drivers turned on with a BLANK-

ING input high. The pnp active pull-downs will sink at least 2.5 mA.

Three temperature ranges are available for optimum performance

in commercial (suffix S-), industrial (suffix E-), or automotive (suffix K-)

applications. Package styles are provided for through-hole DIP (suffix

-A) or minimum-area surface-mount PLCC (suffix -EP). Copper lead

frames, low logic-power dissipation, and low output-saturation voltages

allow these devices to drive most multiplexed vacuum-fluorescent

displays over the maximum operating temperature range.

FEATURES

s Controlled Output Slew Rate s Low Output-Saturation Voltages

s High-Speed Data Storage s Low-Power CMOS Logic

s 60 V Minimum

and Latches

Output Breakdown

s Improved Replacements

s High Data Input Rate

for SN75518N, SN75518NF,

s PNP Active Pull-Downs

UCN5818–, and UCQ5818–

Complete part number includes a suffix to identify operating

temperature range (E-, K-, or S-) and package type (-A or -EP).

Always order by complete part number, e.g., A6818SEP .

Share Link: