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參數(shù)資料
| 型號： | 6818 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | DABiC-IV, 32-BIT SERIAL-INPUT, LATCHED SOURCE DRIVER |
| 中文描述： | 達(dá)比奇第四，32位串行輸入，鎖存源驅(qū)動 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 142K |
| 代理商： | 6818 |
Complete part number includes a suffix to identify operating
temperature range (E- or S-) and package type (-A or -EP). Always
order by complete part number, e.g.,
A6818SEP
.
4
5
6
7
8
9
10
12
13
14
15
16
17
18
11
19
20
31
32
33
34
35
36
37
LOAD
SUPPLY
BB
V
OUT
2
OUT
7
OUT
8
Dwg. PP-029-4
OUT
31
OUT
30
OUT
25
23
24
25
26
27
28
29
30
SERIAL
DATA OUT
BLANKING
LOGIC
SUPPLY
39
40
SERIAL
DATA IN
STROBE
GROUND
CLOCK
CLK
ST
BLNK
OUT
9
OUT
10
OUT
15
OUT
16
OUT
24
OUT
23
OUT
22
OUT
17
L
R
R
L
2
3
38
OUT
6
OUT
1
OUT
4
OUT
3
OUT
32
1
21
22
OUT
20
OUT
18
OUT
14
OUT
19
OUT
21
OUT
11
OUT
12
OUT
13
OUT
5
OUT
29
OUT
28
OUT
27
OUT
26
DD
V
DABiC-IV, 32-BIT SERIAL-INPUT,
LATCHED SOURCE DRIVER
D
2
The A6818– devices combine a 32-bit CMOS shift register,
accompanying 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 (com-
pared 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 applica-
tions requiring additional drive lines. Similar devices are available 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.
Two temperature ranges are available for optimum performance in
commercial (suffix S-) or industrial (suffix E-) 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
I
Controlled Output Slew Rate
I
High-Speed Data Storage
I
60 V Minimum
Output Breakdown
I
High Data Input Rate
I
PNP Active Pull-Downs
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25
°
C
Logic Supply Voltage, V
DD
...................
7.0 V
Driver Supply Voltage, V
BB
...................
60 V
Continuous Output Current Range,
I
OUT
.........................
-40 mA to +15 mA
Input Voltage Range,
V
IN
.......................
-0.3 V to V
DD
+ 0.3 V
Package Power Dissipation,
P
D
........................................
See Graph
Operating Temperature Range, T
A
(Suffix ‘E–’) ..................
-40
°
C to +85
°
C
(Suffix ‘S–’) ..................
-20
°
C to +85
°
C
Storage Temperature Range,
T
S
...............................
-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.
A6818xA
6818
I
Low Output-Saturation Voltages
I
Low-Power CMOS Logic
and Latches
I
Improved Replacements
for SN75518N, SN75518NF,
UCN5818
–
, and UCQ5818
–
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