A6275ELW
Data Sheet
26185.200
8-BIT SERIAL-INPUT, CONSTANTCURRENT LATCHED LED DRIVER
Always order by complete part number, e.g., A6275EA .
The A6275EA and A6275ELW are specifically designed for LEDdisplay applications. Each BiCMOS device includes an 8-bit CMOS 
shift register, accompanying data latches, and eight npn constantcurrent sink drivers. Except for package style and allowable package 
power dissipation, the two devices are identical.
The CMOS shift register and latches allow direct interfacing with 
microprocessor-based systems. With a 5 V logic supply, typical serial 
data-input rates are up to 20 MHz. The LED drive current is determined by the user’s selection of a single resistor. A CMOS serial data 
output permits cascade connections in applications requiring additional 
drive lines. For inter-digit blanking, all output drivers can be disabled 
with an ENABLE input high. Similar 16-bit devices are available as 
the A6276EA and A6276ELW.
Two package styles are provided for through-hole DIP (suffix A) or 
surface-mount SOIC (suffix LW). Under normal applications, copper 
lead frames and low logic-power dissipation allow these devices to 
sink maximum rated current through all outputs continuously over the 
operating temperature range (90 mA, 0.9 V drop, +85°C). Both 
devices are also available for operation over the standard temperature 
range of -20°C to +85°C. To order, change the suffix letter ‘E’ to ‘S’.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD......................  7.0 V
Output Voltage Range,
V
O
............................  -0.5 V to +17 V
Output Current, I
O
........................  90 mA
Ground Current, I
GND
................. 750 mA
Input Voltage Range,
V
I
....................  -0.4 V to VDD + 0.4 V
Package Power Dissipation,
P
D
.....................................  See Graph
Operating Temperature Range,
TA.............................  -40°C to +85°C
Storage Temperature Range,
T
S
...........................  -55°C to +150°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.
GROUND
REGISTER
LATCHES
1
2
3
89
10
11
12
13
15
4
5
6
7
14
16
SERIAL 
DATA OUT
LOGIC 
SUPPLY
SERIAL
DATA IN
OUTPUT 
ENABLE
LATCH
ENABLE
CLOCK CK
V
DD
OE
OUT
1
OUT
2
Dwg. PP-029-10
OUT
0
OUT
4
OUT
6
OUT
5
OUT
3
OUT
7
R
EXT
I  
REGULATOR
L
O
Note that the A6275EA (DIP) and the A6275ELW 
(SOIC) are electrically identical and share a 
common terminal number assignment.
6275
FEATURES
■ To 90 mA Constant-Current Outputs
■ Under-Voltage Lockout
■ Low-Power CMOS Logic and Latches
■ High Data Input Rate
■ Pin-Compatible with TB62705CP