6277

Features:

To 150 mA Constant-Current Outputs
24 V Outputs
Under-Voltage Lockout
Low-Power CMOS Logic and Latches
High Data Input Rate
Similar to Toshiba TD62715FN
High/Low Output Current Function


Pinout




Specifications

Supply Voltage, V_DD.......................... 7.0 V
Output Voltage Range,
  V_O ................................... -0.5 V to +24 V
Output Current, IO .........................150 mA
Input Voltage Range,
  V_I............................ -0.4 V to V_DD + 0.4 V
Package Power Dissipation,
  P_D ........................................... See Graph
Operating Temperature Range, T_A
  Suffix 'S-'................... -20°C to +85°C
  Suffix 'E-'................... -40°C to +85°C
Storage Temperature Range,
  T_S ............................... -55°C to +150°C 


Description

The A6277x is specifically designed for LED-display applications. Each BiCMOS device includes an 8-bit CMOS shift register, accompa- nying data latches, and eight npn constant-current sink drivers.  Two package styles and two operating temperature ranges are available.

The CMOS shift register and latches A6277x 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 deter- mined by the user's selection of a single resistor.  A CMOS serial data output of A6277x 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 of A6277x enables full selected current with the application of a logic low, or 50% selected current with the application of a logic high.

The first character of the part number suffix determines the A6277x operating temperature range.  Suffix 'E' is for -40°C to +85°C, and suffix 'S' is -20°C to +85°C.  Two package styles are provided for hrough-hole DIP (suffix 'A') or surface-mount SOIC (suffix 'LW') applications.  The copper lead frame and low logic-power dissipation of A6277x allow the dual in-line package to sink 122 mA through all outputs continuously over the operating temperature range (1.0 V drop, +85°C).