Datasheet Analog Devices MAX6950 — 数据表

19-2227; Rev 2; 3/05 KIT
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AVAIL Serially Interfaced, +2.7V to +5.5V,
5-and 8-Digit LED Display Drivers
Features The MAX6950/MAX6951 are compact common-cathode
display drivers that interface microprocessors to individual 7-segment numeric LED digits, bar graph, or discrete
LEDs through an SPI™-, QSPI™-, MICROWIRE™-compatible serial interface. The supply voltage can be as low
as 2.7V.
The MAX6950 drives up to five 7-segment digits or 40
discrete LEDs. The MAX6951 drives up to eight 7-segment digits or 64 discrete LEDs.
Included on-chip are hexadecimal character decoders
(0–9, A–F), multiplex scan circuitry, segment and digit
drivers, and a static RAM that stores each digit. The
user may select hexadecimal decoding or no-decode
for each digit to allow any mix of 7-segment digits, bar
graph, or discrete LEDs to be driven. The segment current for the LEDs is set by an internal digital brightness
control. The segment drivers are slew-rate limited to
reduce EMI. ♦ High-speed 26MHz SPI-, QSPI-, MICROWIRECompatible Serial Interface Individual digits may be addressed and updated without rewriting the entire display. The devices include a …