SM16705F SamHop Microelectronics Corp., SM16705F Datasheet

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SM16705F

Manufacturer Part Number
SM16705F
Description
8-BIT CONSTANT CURRENT LED DRIVER
Manufacturer
SamHop Microelectronics Corp.
Datasheet
The SM16705P/F/FN are specifically designed for
LED display constant current drivers.
This constant current output circuits is able to setup
by external resistor (I
This IC is monolithic integrated circuit designed to be
used together with Bi-CMOS process.
The devices consist of 8bit shift register, latch, AND-
GATE and Constant Current Drivers.
8-BIT CONSTANT CURRENT LED DRIVER
GENERAL DESCRIPTION
PIN ASSIGNMENTS
SERIAL-IN
CLOCK
LATCH
OUT0
OUT1
OUT2
OUT3
GND
SM16705
1
2
3
4
5
6
7
8
SAMHOP Microelectronics Corp.
OUT
16
15
14
13
12
11
10
9
= 5 ~ 90mA).
V
R-EXT
SERIAL-OUT
ENABLE
OUT7
OUT6
OUT5
OUT4
DD
Page 1
FEATURES
* Constant Current Output :
* Maximum Clock Frequency :
* 5V CMOS Compatible Input
* 16 pin DIP, SOP or SSOP package
* Constant Output Current Matching :
Output-GND
can setup all output current with one resistor
for 5 to 90mA.
f
(Cascade Connect Operate,
Topr = 25
CLK
Voltage
≧ 0.4V
≧ 0.7V
Part Number
SM16705FN
SM16705P
SM16705F
= 25 (MHz)
o
C)
SM16705P/F/FN
Matching
Current
± 6.0%
± 6.0%
Package Type
16pin SSOP
16pin SOP
16pin DIP
Output Current
V.2.0 MAY,2003
5 ~ 40mA
5 ~ 90mA

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SM16705F Summary of contents

Page 1

... Topr = CMOS Compatible Input * 16 pin DIP, SOP or SSOP package * Constant Output Current Matching : Output-GND Current Voltage Matching ≧ 0.4V ± 6.0% ≧ 0.7V ± 6.0% Part Number SM16705P SM16705F SM16705FN Page 1 Output Current 5 ~ 40mA 5 ~ 90mA Package Type 16pin DIP 16pin SOP 16pin SSOP V.2.0 MAY,2003 ...

Page 2

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER PIN DESCRIPTION Pin NO Pin Name SERIAL- 5~ ENABLE 14 O SERIAL-OUT Function Description GND GND terminal Terminal of serial-data input to the shift register. CLOCK Input terminal of a clock for shift register on rising edge. ...

Page 3

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER TRUTH TABLE CLOCK LATCH ENABLE DOWN X DOWN X Note : 1.OUT0~7=on when Dn="H" ; OUT0~7=off when Dn="L" order to ensure that the level of the power supply voltage is correct, an external resistor must be connected betwen R-EXT and GND ...

Page 4

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER BLOCK DIAGRAM R-EXT I-REG. ENABLE LATCH SERIAL-IN CLOCK TIMING DIAGRAM CLOCK SERIAL-IN LATCH ENABLE OUT0 OUT1 OUT2 OUT7 SERIAL-OUT Note : Latches are level sensitive, not rising edges sensitive and not synchronous CLOCK. Input of LATCH-terminal to H Level, data passes latches, and input of LATCH -terminal to L level, data hold latches ...

Page 5

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER MAXIMUM RATINGS ( Characteristic Supply Voltage Input Voltage Output Current Output Voltage Clock Frequency GND Terminal Current Power Dissipation Thermal Resistance Operating Termerature Storage Temperature (Note) DIP : Ambient temperature derated above 25 SOP/ SSOP: Ambient temperature delated above 25 ...

Page 6

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER ELECTRICAL CHARACTERISTICS (V Characteristic Symbol "H" Level Input Voltage "L" Level Output Leakage Current Output SERIAL-OUT Voltage Output Current 1 Current Skew Output Current 2 Current Skew Supply Voltage Regulation % / V Pull-Up Resistor Pull-Down Resistor ...

Page 7

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER SWITCHING CHARACTERISTICS ( Characteristic SERIAL-IN-OUTn LATCH-OUTn Propagation Delay Time ("L" to "H") ENABLE-OUTn CLOCK -SERIAL-OUT SERIAL-IN-OUTn LATCH-OUTn Propagation Delay Time ("H" to "L") ENABLE-OUTn CLOCK -SERIAL-OUT Output Rise Time ...

Page 8

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER TEST CIRCUIT DC Characteristic ENABLE CLOCK I II IL, H LATCH SERIAL- R-EXT lref AC Characteristic V V IL, IH SW- MATRIX PRECAUTIONS FOR USING Utmost care is necessary in the design of the output line short-circuit between outputs, air contamination fault, or fault by improper grounding. ...

Page 9

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER TIMING WAVEFORM 1. CLOCK, SERIAL-IN, SERIAL-OUT, OUTn CLOCK SERIAL-IN SERIAL-OUT, OUTn (current) 2. CLOCK-LATCH CLOCK SERIAL-IN LATCH 3. ENABLE-OUTn ENABLE OUTn (Current CLK tw CLK 90% 90% 50% 50% 10% 10% t (D) t (D) setup hold 50% 50 90% 50% 10% ...

Page 10

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER Output Current - Duty (LED turn-on rate 1.6 1.4 P FREE AIR 1.2 1 F/FN ON PCB 0.8 0.6 F/FN FREE AIR 0.4 0.2 0 -40 - Ambient Temerature Ta ( Output Current - Output Voltage 0.09 0.08 0.07 0.06 0.05 0.04 Ice 0.03 0.02 0.01 0 -0.01 0 0.5 Output Current - R 100 200 300 ...

Page 11

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER [1] Output Current (I ) OUT I is set by the enternal resistor (R-EXT) as shown in Firgure1. OUT [2] Total supply voltage (V LED This device can operate at 0.4~0.7V (V voltage is consumed inside the device, that leads to more power dissipation. In order to minimize power dissipation and loss, we would like to recommend to set the total supply voltage ...

Page 12

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER PACKAGE OUTLINE SM16705P 16 PIN DIP 16 1 19.69 MAX 19.18 + 0.51 0.635 + 0.254 2.54 1.524 Weight: 1.11g(Type 0.4572 Page 12 SM16705P/F/FN Unit : mm V.2.0 MAY,2003 ...

Page 13

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER PACKAGE OUTLINE SM16705F 16 PIN SOP 16 1 0.56 1. 0.51 0.25 Page 13 SM16705P/F/FN Unit : mm 1.27 V.2.0 MAY,2003 ...

Page 14

... SAMHOP Microelectronics Corp. 8-BIT CONSTANT CURRENT LED DRIVER PACKAGE OUTLINE SM16705FN 16 PIN SSOP 16 1 0.229 0.635 0.3MAX 4 0.15 Page 14 SM16705P/F/FN Unit : mm 0.635 V.2.0 MAY,2003 ...

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