Data Sheet
26185.114B
A6841
DABiC-5 8-Bit Serial Input Latched Sink Drivers
The merging of low-power CMOS logic and bipolar output power
drivers permit the A6841 integrated circuits to be used in a wide variety
of peripheral power driver applications. Each device has an eight-bit
CMOS shift register and CMOS control circuitry, eight CMOS data
latches, and eight bipolar current-sinking Darlington output drivers. The
500 mA NPN Darlington outputs, with integral transient-suppression
diodes, are suitable for use with relays, solenoids, and other inductive
loads.
All package variations of the A6841 offer premium performance with
a minimum output-breakdown voltage rating of 50 V (35 V sustaining).
All drivers can be operated with a split supply where the negative sup-
ply is up to –20 V.
Package LW
18-pin Wide Body SOIC
The CMOS inputs are compatible with standard CMOS logic levels.
TTL circuits may require the use of appropriate pull-up resistors. By
using the serial data output, drivers can be cascaded for interface appli-
cations requiring additional drive lines.
The A6841SA devices are furnished in a standard 18-pin plastic DIP. The
A6841SLW device is available in an 18-lead SOIC package. A 20-pin
SOIC version, A6841SLW-20 has improved thermal characteristics. The
SOIC drivers are also available for operation to a temperature of –40°C
(part number suffix
ELW).
These devices are lead (Pb) free, with 100%
matte tin plated leadframes.
Package A
18-pin DIP
Package LW-20
20-pin Wide Body SOIC
FEATURES
3.3 V to 5 V logic supply range
Power on reset (POR)
To 10 MHz data input rate
CMOS, TTL compatible inputs
–40°C operation available
Low-power CMOS logic and latches
Schmitt trigger inputs for
improved noise immunity
High-voltage current-sink outputs
Internal pull-up/pull down resistors
Output transient-protection diodes
Single or split supply operation
ABSOLUTE MAXIMUM RATINGS
Output Voltage
V
CE
..............................................................50
V
V
CE(SUS)
(for inductiove load applications) .......35
V
Logic Supply Voltage, V
DD
...................................7
V
Emitter Supply Voltage, V
EE
.............................–20
V
Input Voltage Range, V
IN
..............–0.3
V to V
DD
+0.3 V
Continuous Output Current (each output), I
OUT
...
500 mA
Package Power Dissipation, P
D
,
see
chart, page 6
Operating Temperature Range
Ambient Temperature, T
A
............–20°C
to +85°C
Storage Temperature, T
S
..........–55°C
to +150°C
Caution: CMOS devices have input-static protection,
but are susceptible to damage when exposed to
extremely high static-electrical charges.
APPLICATIONS
Relays
Solenoids
Inductive loads
Use the following complete part numbers when ordering:
Part Number
A6841SA-T
A6841SLW-T
A6841SLW-20-T
A6841ELW-T
A6841ELW-20-T
Package
18-pin DIP
18-pin wide body SOIC
20-pin wide body SOIC
(enhanced thermals)
18-pin wide body SOIC
20-pin wide body SOIC
(enhanced thermals)
Ambient
–20ºC to +85ºC
–20ºC to +85ºC
–20ºC to +85ºC
–40ºC to +85ºC
–40ºC to +85ºC
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
