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The A6275EA and A6275ELW are 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. 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 deter- mined 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'.
6275 Maximum Ratings
Supply Voltage, VDD.......................... 7.0 V Output Voltage Range, VO .................................. -0.5 V to +17 V Output Current, IO ......................... 90 mA Ground Current, IGND................... 750 mA Input Voltage Range, VI.......................... -0.4 V to VDD + 0.4 V Package Power Dissipation, PD .......................................... See Graph Operating Temperature Range, TA ................................ -40°C to +85°C Storage Temperature Range, TS .............................. -55°C to +150°C
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