A6278 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
View to exact match
A6278 Datasheet PDF : 18 Pages
| |||
A6278 and
A6279
Serial-Input, Constant-Current Latched
LED Drivers with Open LED Detection
Package A, LW, LP
16-pin
Pin-out Diagrams
Package A, LW, LP
24-pin
GND 1
SERIAL DATA IN 2
CLOCK 3
LATCH ENABLE 4
EP
OUT0 5
OUT1 6
OUT2 7
OUT3 8
16 LOGIC SUPPLY
15 REXT
14 SERIAL DATA OUT
13 OUTPUT ENABLE
12 OUT7
11 OUT6
10 OUT5
9 OUT4
Package ET
GND 1
SERIAL DATA IN 2
CLOCK 3
LATCH ENABLE 4
OUT0 5
OUT1 6
EP
OUT2 7
OUT3 8
OUT4 9
OUT5 10
OUT6 11
OUT7 12
24 LOGIC SUPPLY
23 REXT
22 SERIAL DATA OUT
21 OUTPUT ENABLE
20 OUT15
19 OUT14
18 OUT13
17 OUT12
16 OUT11
15 OUT10
14 OUT9
13 OUT8
OUT11 22
OUT12 23
OUT13 24
OUT14 25
OUT15 26
OUTPUT ENABLE 27
NC 28
14 OUT4
13 OUT3
12 OUT2
EP
11 OUT1
10 OUT0
9 LATCH ENABLE
8 NC
Terminal List Table
Number
A, LW, LP
A6278 A6279
1
1
ET
A6279
5
Name
GND
2
2
6
SERIAL DATA IN
3
3
7
CLOCK
4
4
9
LATCH ENABLE
5 TO 12 5 TO 20 10 to 26
OUTx
13
21
27
OUTPUT ENABLE
14
22
1
SERIAL DATA OUT
15
23
2
REXT
16
24
3
LOGIC SUPPLY
–
–
4, 8, 18,
28
NC
–
–
–
EP
Function
Reference terminal for logic ground and power ground
Serial-data input to the shift-register
Clock input terminal; data is shifted on the rising edge of the clock.
Data strobe input terminal; serial data is latched with a high-level input
Current-sinking output terminals
(Active low) Set low to enable output drivers; set high to turn OFF
(blank) all output drivers
CMOS serial-data output; for cascading to the next device (to that
device SERIAL DATA IN pin); for reading OCD bits.
An external resistor at this terminal establishes the output current for all
of the sink drivers.
(VDD) Logic supply voltage (typically 3.3 or 5.0 V)
No connection
LP and ET packages only; exposed thermal pad for heat dissipation
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Share Link: 