A6277SLWTR Allegro Microsystems Inc, A6277SLWTR Datasheet - Page 2

• Manufacturer Part Number: A6277SLWTR
• Description: IC LED DRIVER LINEAR 20-SOIC
• Manufacturer: Allegro Microsystems Inc
• Type: Linear (Non-Switching)r

Specifications of A6277SLWTR

• Constant Current: Yes
• Topology: 8-Bit Shift Register
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: General Purpose
• Frequency: 20MHz
• Voltage - Supply: 4.5 V ~ 5.5 V
• Voltage - Output: 1V
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Operating Temperature: -20°C ~ 85°C
• Current - Output / Channel: 120mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Efficiency: -

Features and Benefits
▪ Up to 150 mA constant-current outputs
▪ Undervoltage lockout
▪ Low-power CMOS logic and latches
▪ High data input rate
▪ Similar to Toshiba
▪ High/low output current function
▪ Digital dimming control
Package: 20-pin SOICW (suffix LW)
26185.202G
Not to scale
8-Bit Serial Input Constant-Current Latched LED Driver
®
TD62715FN
Functional Block Diagram
Description
The A6277 is specifically designed for LED display
applications. Each BiCMOS device includes an 8-bit CMOS
shift register, accompanying data latches, and eight NPN
constant-current sink drivers.
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 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. In addition, a HIGH/LOW function enables full
selected current with the application of a logic low, or 50%
selected current with the application of a logic high.
The surface-mount wide SOIC (LW) is lead (Pb) free, with
100% matte-tin leadframe plating.
A6277