View DM114_394044.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

DM114DM115
Version Issue Date File Name Total Pages : A.002 : 2005/03/18 : sp-DM1145-A.002 : 17
8-Bit CONSTANT CURRENT LED DRIVERS with 3.3v ~ 5v supply voltage
9 7 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel886-3-5645656 Fax886-3-5645626
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
DM114DM115
8-Bit CONSTANT CURRENT LED DRIVERS with 3.3v ~ 5v Supply Voltage
General Description
The DM114DM115 is the constant current driver specifically designed for LED display applications. The value of constant current can be varied using an external resistor. The devices include an 8-bit shift register, latches, and constant current drivers on a single Silicon CMOS chip.
Features
Maximum Output Voltage: Maximum Clock Frequency: Power Supply Voltage: CMOS Compatible Input Package: Package and Pin Layout: 17V 25MHz (Cascade Operation) 3.3V to 5.0V
PDIP16, SOP16, SSOP16 Pin layout and functionality are similar to those of the ST2221A. (Each characteristic value is different.) Constant Current Matching: (Ta = 25CVDD = 5.0V) Chip-to-Chip: 10.0% DM114: Bit-to-Bit: 4.0% @ IOUT = 30 ~ 90mA 6.0% @ IOUT = 20 ~ 30mA DM115: Bit-to-Bit: 4.0% @ IOUT = 20 ~ 60mA 6.0% @ IOUT = 5 ~ 20mA
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 1
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Pin Connection (Top view)
GND SERIAL-IN CLOCK LATCH OUT0 OUT1 OUT2 OUT3
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VDD R-EXT SERIAL-OUT ENABLE OUT7 OUT6 OUT5 OUT4
Block Diagram
OUT0 R-EXT
I-REG.
OUT1
OUT7
ENABLE
Delay Unit Q ST D Delay Unit Q ST D Delay Unit Q ST D
LATCH SERIAL-IN CLOCK
D CK Q D CK Q D CK Q
SERIAL-OUT
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 2
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Timing Diagram
CLOCK SERIAL IN LATCH ENABLE OUT0 OUT1 OUT2 OUT7 SERIAL-OUT
3.3/5V 0V 3.3/5V 0V 3.3/5V 0V 3.3/5V 0V Off On Off Off On Off 3.3/5V 0V
(Note) Latches are level sensitive (not edge triggered). LATCH-terminal = H level, latches become transparent; LATCH-terminal = L level, latches hold data. ENABLE-terminal = H level, all outputs (OUT0~7) are off. An external resistor is connected between R-EXT and GND for setting up the value of constant current. SERIAL-OUT changes state on the rising edges of clock.
Pin Description
PIN No. 1 2 3 4 5~12 13 14 15 16 PIN NAME GND SERIAL-IN CLOCK LATCH OUT0~7 ENABLE SERIAL-OUT R-EXT VDD FUNCTION GND terminal Input terminal of a data shift register Input terminal of a clock for shift register Input terminal for data strobe Output terminals Input terminal for output enable (active low) Output terminal of a data shift register Input terminal of an external resistor 3.3/5V Supply voltage terminal
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 3
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Equivalent Circuit of Inputs and Outputs
1. ENABLE terminal 2. LATCH terminal
VDD
RIN(up)
VDD INPUT
RIN(down)
INPUT
GND
3. CLOCK, SERIAL-IN terminal
GND
4. SERIAL-OUT terminal
VDD INPUT
VDD SERIAL_OUT GND
GND
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 4
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Maximum Ratings (Ta = 25C, Tj(max) = 150C)
CHARACTERISTIC Supply Voltage Input Voltage Output Current Output Voltage Clock Frequency GND Terminal Current SYMBOL VDD VIN IOUT VOUT fCLK IGND RATING 0 ~ 7.0 -0.4 ~ VDD+0.4 90 (DM114) 60 (DM115) -0.3 ~ 17 25 750 500 1.64 ( PDIP-16 : Ta=25C) 1.08 ( SOP-16 : Ta=25C) 0.8 ( SSOP-16 : Ta=25C) 76 ( PDIP-16 ) 115 ( SOP-16 ) 155 ( SSOP-16 ) -55 ~ 150 UNIT V V mA V MHz mA
Power Dissipation
PD
W
Thermal Resistance Storage Temperature
Rth(j-a) Tstg
C/W C
Recommended Operating Condition
CHARACTERISTIC Supply Voltage Output Voltage Operating temperature Output Current SYMBOL VDD VOUT TOPR IO IOH IOL VIH VIL tw LAT tw CLK tsetup(D) thold(D) tsetup(L) fCLK PD CONDITION

OUTn SERIAL-OUT SERIAL-OUT
MIN. 3.0
TYP.
-40

0.7VDD -0.3 15 15 10 10 15
Input Voltage LATCH Pulse Width CLOCK Pulse Width Set-up Time for DATA Hold Time for DATA Set-up Time for LATCH Clock Frequency Power Dissipation

VDD = 3.0 ~ 5.5 V
2 chips cascade operation
Ta = 85C(PDIP-16) Ta = 85C(SOP-16) Ta = 85C(SSOP-16)

MAX. 5.5 17 85 60 1.0 -1.0 VDD+0.3 0.3VDD
UNIT V V mA
V ns ns ns ns ns MHz W

25 0.85 0.56 0.41
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 5
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Electrical Characteristics (VDD = 5.0 V, Ta = 25C unless otherwise noted)
CHARACTERISTIC Input Voltage "H" Level Input Voltage "L" Level Output Leakage Current SYMBOL VIH VIL IOH VOL VOH VOL VOH
Iout
DM114 DM115 DM114 DM115
CONDITION

VOH = 17 V IOL = 1.0 mA, VDD=5V IOH = -1.0 mA, VDD=5V IOL = 1.0 mA, VDD=3.3V IOH = -1.0 mA, VDD=3.3V
VOUT = 1.2V (1 channel on) VOUT = 1.2V (1 channel on) REXT = 390 REXT = 780 REXT = 390 REXT = 780
MIN. 0.7VDD GND
TYP.

4.6
Output Voltage ( S - OUT)
2.7

1.5
MAX. VDD 0.3VDD 1.0 0.4
UNIT V uA
0.4
V
4
Output Current (Bit-Bit) Output Current (Chip-Chip) Output Voltage Regulation Pull-Up Resistor Pull-Down Resistor
36.0 18.0
% mA %/V K K
Iout
% / Vout RIN(up) RIN(down)
Idd (off)
VDD=5V
Vdd = 3.3V ~ 5.0V
200 100

REXT = OPEN, all outputs off
DM114

Supply Current "OFF"
REXT = 200, OUT0~7 = off
REXT = OPEN, all outputs off
DM115
Supply Current "ON"
Idd
(on) DM114
VDD=5V
DM115 DM114
REXT = 300, OUT0~7 = off REXT = 200, OUT0~7 = on REXT = 300, OUT0~7 = on
REXT = OPEN, all outputs off
Supply Current "OFF"
Idd (off)
VDD=3.3V
REXT = 200, OUT0~7 = off
REXT = OPEN, all outputs off
DM115
REXT = 300, OUT0~7 = off REXT = 200, OUT0~7 = on REXT = 300, OUT0~7 = on
40.0 20.0 0.1 400 200 1.3 11.0 5.0 11.0 11.0 11.0 1.1 10.7 1.1 7.2 10.7 7.2
44.0 22.0 0.5 600 300

mA
mA
Supply Current "ON"
Idd
(on) DM114
VDD=3.3V DM115
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 6
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Switching Characteristics (Ta = 25 C unless otherwise noted)
DM114
CHARACTERISTIC Propagation ENABLE-OUTn Delay Time ("L" to "H") CLK-SOUT Propagation ENABLE-OUTn Delay Time ("H" to "L") CLK-SOUT Output Current Rise Time Output Current Fall Time SYMBOL
tpLH tpHL tor tof
CONDITION VDD=5.0V VIH=VDD VIL=GND REXT=210 VL=5.0V RL=47 CL=15pF
MIN.
TYP. 40 16 70 16 250 30
MAX. 80 20 140 20 400 50
UNIT ns ns ns ns
DM115
CHARACTERISTIC Propagation ENABLE-OUTn Delay Time ("L" to "H") CLK-SOUT Propagation ENABLE-OUTn Delay Time ("H" to "L") CLK-SOUT Output Current Rise Time Output Current Fall Time SYMBOL
tpLH tpHL tor tof
CONDITION VDD=5.0V VIH=VDD VIL=GND REXT=630 VL=5.0V RL=150 CL=15pF
MIN.
TYP. 40 16 70 16 10 30
MAX. 80 20 140 20 15 50
UNIT ns ns ns ns
Note: (Delay between outputs) The DM114DM115 also incorporated the delay unit between outputs. The delay time is 4 ns(typ.), out7 has no delay, out5 has 4 ns delay, out 3 has 8 ns delay, and then out 1, out 0, out 2, out 4, out6. The delay is to prevent large current impulse.
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 7
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Test Circuit
DC characteristic
IDD
VDD ENABLE IIL ,IIH CLOCK LATCH VIL ,VIH SERIAL-IN R-EXT GND
OUT0 IOL
OUT7 SERIAL-OUT
I ref
AC characteristic
VIL ,VIH ENABLE
VDD
RL OUT0 CL
SWMATRIX
CLOCK LATCH SERIAL-IN R-EXT GND OUT7 SERIAL-OUT CL RL
CL
VL
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 8
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Timing Diagram
1. CLOCK-SERIAL OUT, OUTn
tr twCLK
90% 50% 10% 90% 50% 10%
tf
twCLK
50%
CLOCK
tsetup
thold
SERIAL-IN
50%
50%
tor OUTn (current) tpLH
50% 90% 50% 10%
tof
90% 50% 10%
tpHL
50%
SERIAL-OUT tpLH tpHL
2. CLOCK-LATCH
50%
CLOCK
SERIAL-IN
"L" level = DATA HOLD tw(LAT) LATCH tsetup(L)
50% 50%
3. ENABLE-OUTn (Current)
ENABLE
50% 50%
tpLH
tpHL
50%
50%
OUTn
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 9
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Output Current vs. External Resistor
DM114
90 80 70 60 Iout (mA) 50 40 30 20 10 0 0 100 200 300 400 500 600 700 800 900 Rext (Ohm)
10 0 0 200 400 600 800 1000 1200 1400 1600 1800 Rext (Ohm) Iout (mA) 50 40 30 20
DM115
70 60
DM114:
Iout 1.3V / Rext * 12
DM115:
Iout 1.3V / Rext * 12.5
Output Current Performance vs. Output Voltage
DM114
100 90 80 70 Iout (mA)
DM115
60 55 50 45 40 Iout (mA)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 Vout (V)
60 50 40 30 20 10 0
35 30 25 20 15 10 5 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 Vout (V)
Note: In order to obtain a good constant current output, a suitable output voltage is necessary. Users can get related information about the minimum output voltage from the above graph. Page 10
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Imax - Ta ( DM114 )
Pd - Ta 1.80 1.60 1.40 1.20 Pd (W) 1.00 0.80 0.60 0.40 0.20 0.00 0 20 40 60 Ta 80 100 120 140 160
SSOP SOP DIP
100
DIP
90 80 70 Imax (mA) 60 50 40 30 20 10 0 0 20 40 60 80 Ta 100 120 140 160
SSOP SOP
Imax - Ta ( DM115 ) 70 60
DIP
50 Imax (mA)
SOP
40 30 20 10 0 0 20 40 60 80 Ta 100 120 140 160
SSOP
Note As the power dissipation of a semiconductor chip is limited its package and ambient temperature, this device requires a maximum output current be calculated for a given operating condition. The maximum allowable power consumption (Pd (max)) of this device is calculated as follows: (Tj (junction temperature) (max) - Ta (ambient temperature) )(C ) Pd (max)(Watt ) = Rth (C / Watt ) Based on the Pd (max), the maximum allowable current can be calculated as follows: Iout = ( Pd - VDDIDD) / ( # outputsVoDuty )
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 11
Preliminary
Vo
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
System Configuration Example
[1] Output current (IOUT) Sink current is set by the external resistor as shown in figure (Iout vs. Rext). [2] LED supply voltage (VLED) setup VLED = VCE ( Tr Vsat ) + Vf ( LED forward voltage ) + VO ( IC supply voltage) To prevent too much power dissipated by the device due to higher VLED , an additional R can be used to reduce the Vout when the outputs consume current:
V DD V L E D = 3 ~ 4 (V )
SCAN OUT0 ENABLE CLO CK LATCH S E R IA L -IN R -E X T G N D CPU OUT7 S E R IA L -O U T R
OUT0 ENABLE CLO CK LATCH S E R IA L -IN R -E X T G N D OUT7 S E R IA L -O U T
R= Note
VLED - Vf - VO (min) IO (max) * Bit (max)
This device has only one ground pin shared by signal, output sink current, and power ground. It is advisable to pattern the ground layout with minimized inductance such that the switching noise induced by the input signals and the output sink current would not cause chip malfunction. To prevent the drivers' outputs from damage by overshoot stress, it is also advisable not to turn off the drivers and scan transistors simultaneously.
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 12
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Package Outline PDIP16
Unit: mm
16
9
6.350.13
0~15 3.30.1 5.33MAX 0.4572 0.38MIN 3.30.508 9.020508 7.62
1
19.69MAX 19.180.51
8
1.524 0.6350.254 2.54
Weight : 1.11g(Typ.)
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 13
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Package Outline SOP16
Unit: mm
16
9 4.0MAX 6.2MAX 1.75
0.56
1 1.27
8
0.51
10 1.5
0.25
0.25
1.27
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 14
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
Package Outline SSOP16
Unit: mm
16
9
3.91 1 0.229 0.635 8 0.3Max 4.9 1.5
1.63MAX
5.99
0.254
0.15
0.635
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 15
Preliminary
SILICON TOUCH TECHNOLOGY INC.
DM114DM115
The products listed herein are designed for ordinary electronic applications, such as electrical appliances, audio-visual equipment, communications devices and so on. Hence, it is advisable that the devices should not be used in medical instruments, surgical implants, aerospace machinery, nuclear power control systems, disaster/crime-prevention equipment and the like. Misusing those products may directly or indirectly endanger human life, or cause injury and property loss. Silicon Touch Technology, Inc. will not take any responsibilities regarding the misusage of the products mentioned above. Anyone who purchases any products described herein with the above-mentioned intention or with such misused applications should accept full responsibility and indemnify. Silicon Touch Technology, Inc. and its distributors and all their officers and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such intention and manipulation.
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 16
Preliminary

▲Up To Search▲

Price & Availability of DM114

	To Download DM114 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .