Digchip : Database on electronics components
Electronics components database



Details, datasheet, quote on part number: DM9368N
 
 
Part numberDM9368N
Category
Description7-Segment Decoder/driver/latch With Constant Current Source Outputs
CompanyFairchild Semiconductor
DatasheetDownload DM9368N datasheet
 


 
Specifications, Features, Applications
DM9368 7-Segment Decoder/Driver/Latch with Constant Current Source Outputs

The a 7-segment decoder driver incorporating input latches and constant current output circuits to drive common cathode type LED displays directly.

Order Number DM9368N Package Number N16E Package Description 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

Pin Name A0A3 RBO RBI ag LE Description Address (Data) Inputs Ripple Blanking Output (Active LOW) Ripple Blanking Input (Active LOW) Segment Drivers-Outputs Latch Enable Input (Active LOW)

*The RBI will blank the display only if a binary zero is stored in the latches. *The RBO used as an input overrides all other input conditions. H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial

The a 7-segment decoder driver designed to drive 7-segment common cathode LED displays. The DM9368 drives any common cathode LED display rated at a nominal at 1.7V per segment without need for current limiting resistors. This device accepts a 4-bit binary code and produces output drive to the appropriate segments of the 7-segment display. It has a hexadecimal decode format which produces numeric codes "0" thru "9" and alpha codes "A" through "F" using upper and lower case fonts. Latches on the four data inputs are controlled by an active LOW latch enable LE. When the LE is LOW, the state of the outputs is determined by the input data. When the LE goes HIGH, the last data present at the inputs is stored in the latches and the outputs remain stable. The LE pulse width necessary to accept and store data is typically 30 ns which allows data to be strobed into the DM9368 at normal TTL speeds. This feature means that data can be routed directly from high speed counters and frequency dividers into the display without slowing down the system clock or providing intermediate data storage. Another feature of the DM9368 is that the unit loading on the data inputs is very low (-100 A Max) when the latch enable is HIGH. This allows to be driven from an MOS device in multiplex mode without the need for drivers on the data lines. The DM9368 also has provision for automatic blanking of the leading and/or trailing edge zeros in a multidigit decimal number, resulting in an easily readable decimal display conforming to normal writing practice. In an eight digit mixed integer fraction decimal representation, using the automatic blanking capability, 0060.0300 would be displayed as 60.03. Leading edge zero suppression is obtained by connecting the Ripple Blanking Output (RBO) of a decoder to the Ripple Blanking Input (RBI) of the next lower stage device. The most significant decoder stage should have the RBI input grounded; and since suppression of the least significant integer zero in a number is not usually desired, the RBI input of this decoder stage should be left open. A similar procedure for the fractional part of a display will provide automatic suppression of trailing edge zeros. The RBO terminal of the decoder can be OR-tied with a modulating signal via an isolating buffer to achieve pulse duration intensity modulation. A suitable signal can be generated for this purpose by forming a variable frequency multivibrator with a cross coupled pair of TTL or DTL gates.

Parallel Data Display System with Ripply Blanking



Some Part number from the same manufacture Fairchild Semiconductor
DM9370 7-Segment Decoder/driver/latch With Open-collector Outputs
DM9374 7-Segment Decoder/driver/latch With Constant Current Sink Outputs
DM93L14 Quad Latch
DM93L28 Dual 8-Bit Shift Register
DM93L38 8-Bit Multiple Port Register
DM93S41 4-Bit Arithmetic Logic Unit
DM93S62 9-Input Parity Checker/generator
DM9602 Dual Retriggerable Resettable One Shots
DM9638N 7-segment Decoder/driver/latch With Constant Current Source Outputs
DM96L02 Dual Retriggerable Resettable Monostable Multivibrator
DM96LS02 Dual Retriggerable Resettable Monostable Multivibrator (One-Shot)
DM96S02 Dual Retriggerable Resettable Monostable Multivibrator
EGF1A 1.0A Ultra Fast Recovery Rectifier
EGF1A-EGF1D 1.0 Ampere High Efficiency Glass Passivated Rectifier
EGF1B 1.0A Ultra Fast Recovery Rectifier
EGF1C
EGF1D 1.0 Ampere High Efficiency Glass Passivated Rectifier
EGF1D 1.0A Ultra Fast Recovery Rectifier
EGP10 1.0 Ampere Glass Passivated High Efficiency Rectifiers
EGP10A 1.0A Ultra Fast Recovery Rectifier
EGP10A-EGP10K 1.0 Ampere Glass Passivated High Efficiency Rectifiers