AS1108PL austriamicrosystems, AS1108PL Datasheet

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AS1108PL

Manufacturer Part Number
AS1108PL
Description
IC LED 4-DIGIT DRIVER 20-PDIP
Manufacturer
austriamicrosystems
Datasheet

Specifications of AS1108PL

Display Type
LED
Configuration
7 Segment + DP
Interface
Serial
Digits Or Characters
4 Digits
Current - Supply
330mA
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AS1108PL
Manufacturer:
SML
Quantity:
62
Data sheet
A S 11 0 8
4 - D i g i t L E D D i s p l a y D r i v e r
1 General Description
The AS1108 is a compact display driver for 7-segment
numeric displays of up to 4 digits. The device can be
programmed via SPI, QSPI, and Microwire as well as a
conventional 4-wire serial interface.
The device includes an integrated BCD code-B/HEX
decoder, multiplex scan circuitry, segment and display
drivers, and a 32-bit memory. Internal memory stores
the LED settings, eliminating the need for continuous
device reprogramming.
Every segment can be individually addressed and
updated separately. Only one external resistor (R
required to set the current through the LED display. LED
brightness can be controlled by analog or digital means.
The device can be programmed to use the internal
code-B/HEX decoder to display numeric digits or to
directly address each segment.
The AS1108 features an extremely low shutdown cur-
rent of typically 3µA, and an operational current of less
than 500µA. The number of digits can be programmed,
the device can be reset by software, and an external
clock is also supported. Additionally, segment blinking
can be synchronized across multiple drivers.
The AS1108 provides several test modes for easy appli-
cation debugging.
The device is available in a PDIP 20-pin and a SOIC 20-
pin package.
Figure 1. AS1108 - Typical Application Diagram
www.austriamicrosystems.com/LED-Driver-ICs/AS1108
processor
Micro-
9.53kΩ
SCK
I/O
I/O
LOAD/CSN
ISET
GND
CLK
DIN
SET
) is
Revision 2.12
AS1108
VDD
+5V
2 Key Features
3 Applications
The AS1108 is ideal for bar-graph displays, instrument-
panel meters, LED matrix displays, dot matrix displays,
set-top boxes, white goods, professional audio equip-
ment, medical equipment, industrial controllers and
panel meters.
GND
Serial I/O
across multiple drivers)
Digit Selection
data retained)
Open-Loop
- PDIP 20-pin
- SOIC 20-pin
10MHz SPI-, QSPI-, Microwire-Compatible
Individual LED Segment Control
Segment Blinking Control (can be synchronized
Hexadecimal- or BCD-Code/No-Decode
3µA Low-Power Shutdown Current (typ;
Extremely Low Operating Current 0.5mA in
Digital and Analog Brightness Control
Display Blanked on Power-Up
Drive Common-Cathode LED Displays
Supply Voltage Range: +2.7 to +5.5V
Software Reset
Optional External Clock
Packages:
4-Digit Microprocessor Display
DIG0 to
DIG3
SEG A to G
SEP DP
8 Segments
4 Digits
1 - 19

Related parts for AS1108PL

AS1108PL Summary of contents

Page 1

... The AS1108 provides several test modes for easy appli- cation debugging. The device is available in a PDIP 20-pin and a SOIC 20- pin package. Figure 1. AS1108 - Typical Application Diagram Micro- processor www.austriamicrosystems.com/LED-Driver-ICs/AS1108 2 Key Features 10MHz SPI-, QSPI-, Microwire-Compatible Serial I/O Individual LED Segment Control Segment Blinking Control (can be synchronized across multiple drivers) ...

Page 2

... Pin Descriptions Table 1. Pin Descriptions Pin Number Pin Name 1 DOUT 2 DIN DIG 0:DIG GND 9 LOAD/CSN 10 CLK 11, 12, 13, 14, SEG A:SEG G, 17, 18, 19, 20 SEG DP 15 ISET 16 VDD www.austriamicrosystems.com/LED-Driver-ICs/AS1108 DOUT SEG DIN SEG DIG 0 SEG GND SEG DIG 2 VDD 5 16 AS1108 DIG 3 ISET ...

Page 3

... The reflow peak soldering temperature (body temperature) is specified according to IPC/JEDEC J-STD-020D “Moisture/Reflow Sensitivity Classification for non-hermetic Solid State Surface Mount Devices”. 2. Specified according JESD22-B106 “Resistance to Soldering Temperature for Through-Hole Mounted Devices”. 3. Norm: MIL 883 E method 3015. 4. Norm: JEDEC 17. www.austriamicrosystems.com/LED-Driver-ICs/AS1108 Min Max Units V -0 ...

Page 4

... Output Data Propagation Delay LOAD Rising Edge-to-Next Clock Rising Edge Minimum LOAD/CSN Pulse High Data-to-Segment Delay Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. www.austriamicrosystems.com/LED-Driver-ICs/AS1108 Ω ±1 (unless otherwise specified). ...

Page 5

... V SEG OUT 10kΩ 45 SET 20kΩ SET 40kΩ SET 0.5 1 1.5 2 2.5 3 3.5 V (V) OUT www.austriamicrosystems.com/LED-Driver-ICs/AS1108 Figure 4. Scan Frequency vs. V 1960 1940 1920 1900 1880 1860 1840 1820 1800 80 2 Figure 6. I vs. V SEG OUT OUT 0 2 2.5 ...

Page 6

... AS1108 Datasheet - Figure 9. I vs. R SEG SET 2.4V OUT OUT = OUT 1.7V OUT Ω SET www.austriamicrosystems.com/LED-Driver-ICs/AS1108 70 80 Revision 2. ...

Page 7

... All registers should be programmed for normal operation at this time. Note: The default settings enable only scanning of one digit; the internal decoder is disabled and the Intensity Control Register (see page 11) is set to the minimum values. Figure 10. Interface Timing LOAD/ CSN t CSS CLK DIN D15 DOUT www.austriamicrosystems.com/LED-Driver-ICs/AS1108 D10 D14 D1 Revision 2. ...

Page 8

... Table 7. Register Address Map Register HEX Code No-Op 0xX0 Digit 0 0xX1 Digit 1 0xX2 Digit 2 0xX3 Digit 3 0xX4 Decode-Mode 0xX9 Intensity Control 0xXA Scan Limit 0xXB Shutdown 0xXC N/A 0xXD Feature 0xXE Display Test 0xXF www.austriamicrosystems.com/LED-Driver-ICs/AS1108 Address D15:D12 D11 D10 ...

Page 9

... Code-B/HEX decode for digit 0. No decode for digits 3:1 Code-B/HEX decode for digits 3:0 Figure 11. Standard 7-Segment LED Intensity Control and Inter-Digit Blanking Table 10. Code-B Font 7-Segment † Character D7 D6: www.austriamicrosystems.com/LED-Driver-ICs/AS1108 HEX Code D7 D6 0x00 0 X 0x80 1 X 0x01 0 X 0x81 1 X HEX Code D7 0x00 X 0x01 ...

Page 10

... The device remains in display-test mode until the Display- Test Register is set for normal operation. Note: All settings of the Digit- and Control-Registers are maintained. Table 13. Display-Test Register Format (Address (HEX) = 0xXF)) Mode Normal Operation Display Test Mode www.austriamicrosystems.com/LED-Driver-ICs/AS1108 Register Data † ...

Page 11

... Table 15. Scan-Limit Register Format (Address (HEX) = 0xXB)) Scan Limit Display digit 0 only (see Table 16) Display digits 0:1 (see Table 16) Display digits 0:2 (see Table 16) Display digits 0:3 Table 16. Maximum Segment Current for 1-, 2-, or 3-Digit Displays Number of Digits Displayed www.austriamicrosystems.com/LED-Driver-ICs/AS1108 . SET Register Data ...

Page 12

... When the LOAD/CSN signal goes high, all shift registers are latched. The first four devices will receive no-operation commands and only the fifth device will receive the intended operation command, and subsequently update its register. www.austriamicrosystems.com/LED-Driver-ICs/AS1108 D4 D3 ...

Page 13

... Table 22. R vs. Segment Current and LED Forward Voltage, V SET I (mA) SEG 1.5 40 8.6kΩ 30 11.6kΩ www.austriamicrosystems.com/LED-Driver-ICs/AS1108 . The current that flows between V SET . Typical values for R SET SET ) are given in Tables 19 - 23. The maximum current the AS1108 can drive is LED = 2.7V DD 2.0 4.4kΩ ...

Page 14

... Table 24. Package Thermal Data Package Thermal Resistance ( 20 Narrow DIP 20 Wide SOIC www.austriamicrosystems.com/LED-Driver-ICs/AS1108 = 4.0V (Continued (V) LED 2.0 2.5 16.6kΩ 15.6kΩ 34.5kΩ 32.5kΩ (V) LED 2 ...

Page 15

... Otherwise, if one driver is set to display 3 digits and the other to display 2 digits one display will appear brighter because its duty cycle per digit will be 1/2 and the other display’s duty cycle will be 1/3. Note: Refer to No-Op Register (0xX0) on page 12 for additional information. www.austriamicrosystems.com/LED-Driver-ICs/AS1108 4x8 LED Dot Matrix ...

Page 16

... AS1108 Datasheet - Package Drawings and Markings The AS1108 is available in a PDIP 20-pin Figure 13. PDIP 20-pin Package 1. For more Information on the PDIP 20-pin package www.austriamicrosystems.com/LED-Driver-ICs/AS1108 1 and a SOIC 20-pin package. Symbol see Ordering Information on page Revision 2.12 Inches Min Nom Max .210 .015 ...

Page 17

... Top: matte (charmilles #18-30). (2.2) All sides: matte (charmilles #18-30). (2.3) Bottom: smooth or matte (charmilles #18-30). 3. All dimensions exclusive of mold flash, and end flash from the pack- age body shall not exceed 0.24mm (0.10”) per side (D). www.austriamicrosystems.com/LED-Driver-ICs/AS1108 Millimeters Symbol Min A 2 ...

Page 18

... Datasheet - Ordering Information The AS1108 is available as the standard products shown in Table 25. Table 25. Ordering Information Ordering Code Description AS1108PL* 4-Digit LED Display Driver AS1108WL 4-Digit LED Display Driver AS1108WL-T 4-Digit LED Display Driver *) The PDIP 20-pin Package reached end of life. There is the possibility for a last time buy order until end of July 2011. ...

Page 19

... The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the tech- nical data herein ...

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