HT6240-002 Infrared Remote Encoder Features · Operating voltage: 2.2V~3.6V · Few external parts · Low power consumption · 20/24-pin SOP package Applications · Television and video cassette recorder · Car door controllers controllers · Security systems · Garage door controllers · Other remote control systems General Description structions. HT6240-002 have two different packages: 20-pin SOP and 24-pin SOP. HT6240-002 is designed as infrared remote encoders, usually applied to TV systems. The 4´8 key matrix input and the extension bit input can transmit a max. of 256 in- Block Diagram P R B O S C I O S C O O S C T E S T T E S T M O D E IE 0 IE 1 IE 2 IE 3 D A T A K e y S c a n D r iv e r D e c o d e r 8 3 ´ 2 2 D u ty 1 /3 1 0 ´ 2 D iv id e r O F 0 O F 7 O u tp u t S ta g e IE -K E Y E n c o d e r C o n tro l U n it 8 - B it S h ift R e g is te r C u s to m C o d e & D A T A C o d e L a tc h C T P a r a lle l to S e r ia l C o n v e rte r V D D V S S Pin Assignment 1 2 4 V D D 2 2 3 C T P R B 3 2 2 O F 0 O S C I 4 2 1 O F 1 V S S 1 2 0 V D D T E S T 2 1 9 C T P R B 3 1 8 O F 0 O S C O 5 2 0 O F 2 O S C I 4 1 7 O F 1 D A T A 6 1 9 O F 3 O S C O 5 1 6 O F 2 IE 0 7 1 8 O F 4 D A T A 6 1 5 O F 3 IE 1 8 1 7 O F 5 IE 0 7 1 4 O F 4 IE 2 9 1 6 O F 6 IE 1 8 1 3 O F 5 IE 3 1 0 1 5 O F 7 IE 2 9 1 2 O F 6 N C 1 1 1 4 N C IE 3 1 0 1 1 O F 7 N C 1 2 1 3 N C H T 6 2 4 0 -0 0 2 2 0 S O P -A Rev. 1.30 V S S T E S T H T 6 2 4 0 -0 0 2 2 4 S O P -A 1 November 6, 2002 HT6240-002 Pad Assignment V S S V D D C T T E S T P R B 2 0 1 9 1 8 1 7 1 O S C I 2 (0 ,0 ) O S C O 3 D A T E 4 IE 0 5 IE 1 6 7 8 9 1 0 IE 2 IE 3 O F 7 O F 6 1 6 O F 0 1 5 O F 1 1 4 O F 2 1 3 O F 3 1 2 O F 4 1 1 O F 5 Chip size: 92 ´ 118 mil2 * The IC substrate should be connected to VDD in the PCB layout artwork. Pad Coordinates Unit: mil Pad No. X Y Pad No. X Y 1 -40.88 16.11 11 40.12 -48.32 2 -40.88 9.48 12 40.12 -39.74 3 -40.88 -11.56 13 40.12 -24.57 4 -40.88 -24.78 14 40.12 -15.98 5 -40.88 -34.04 15 40.12 -0.81 6 -40.88 -41.18 16 40.12 7.78 7 -13.77 -52.78 17 34.47 53.59 8 -7.14 -52.78 18 -8.97 53.59 9 9.22 -53.55 19 -15.60 53.59 10 24.40 -53.55 20 -22.23 52.02 Rev. 1.30 2 November 6, 2002 HT6240-002 Pad Description Pad No. Pad Name I/O Internal Connection Description 1 PRB I CMOS Pull-high Power on reset 2 OSCI I CMOS Oscillator input 3 OSCO O CMOS Oscillator output I/O CMOS, NMOS Pull-high 4 DATA Detect custom code and extended code 5~8 IE0~IE3 I CMOS Pull-high 9~16 OF7~OF0 O NMOS Drive for key scan 17 CT O CMOS Generates output transmission code 18 VDD ¾ ¾ Positive power supply 19 VSS ¾ ¾ Negative power supply 20 TEST I CMOS Detect input from key matrix TEST=Low normal mode TEST=High test mode Approximate internal connection circuits In p u t te r m in a l P in : T E S T , O S C I V P in : P R B , IE 0 ~ IE 3 V D D V D D D D O u tp u t te r m in a l P in : O S C O , C T V P in : O F 0 ~ O F 7 D D B id ir e c tio n a l te r m in a l P in : D A T A V Rev. 1.30 D D 3 November 6, 2002 HT6240-002 Absolute Maximum Ratings Supply Voltage .........................................-0.3V to 5.2V Input Voltage ..................................VSS-0.3 to VDD+0.3 Output Voltage..............................................VSS to VDD Storage Temperature ............................-40°C to 125°C Operating Temperature ...........................-20°C to 70°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Recommended Operating Condition Symbol VDD Parameter Ta=-20°C~70°C, unless otherwise noted Test Conditions Min. Typ. Max. Unit ¾ 2.2 ¾ 3.6 V 3V ¾ 2.4V 3V 3V High-level Voltage PRB 3V ¾ 2.1V 3V 3V Low-level Input Voltage IE0~IE3, DATA 3V ¾ 0 0 1.2V Low-level Input Voltage PRB 3V ¾ 0 0 0.9V Clock Oscillating Frequency 3V ¾ ¾ 455 ¾ VDD Conditions Supply Voltage ¾ High-level Input Voltage IE0~IE3, DATA VIH VIL fOSC Electric Characteristics Symbol Parameter V V kHz Ta=25°C, VDD=3V, VSS=0V, unless otherwise noted Test Conditions Conditions VDD Limits Min. Typ. Max. Unit VDD Supply Voltage ¾ fOSC=455kHz, Ta=-20°C~70°C 2.2 ¾ 3.6 V IDD Supply Current (during operation) 3V fOSC=455kHz ¾ 0.1 0.3 mA IDD Supply Current (while not in operation) 3V ¾ ¾ 1 mA IOH High-level Output Current CT 3V VOH=2V -5 -10 ¾ mA Low-level Output Current CT 3V VOL=0.9V 0.3 0.8 ¾ Low-level Output Current DATA 3V VOL=0.9V 1 4 ¾ Low-level Output Current OF0~OF7 3V VOL=0.9V 1 4 ¾ Pull-up Resistance PRB 3V ¾ ¾ 80 ¾ Pull-up Resistance DATA 3V ¾ ¾ 70 ¾ Pull-up Resistance E0~E3 3V ¾ ¾ 70 ¾ IOL RI Rev. 1.30 ¾ 4 mA kW November 6, 2002 HT6240-002 Functional Description Key operation The input pins (IE0~IE3) and the output pins (OF0~OF7) constitute a max. of 4´8 key matrix which is also called standard key. The extended key is formed by input pin DATA and the scan output (OF5~OF7). The 4´8 key matrix and the extended key can transmit a max. of 256 instruction. D A T A C u s to m c o d e CT maintains ²L² and no transmission code is generated when two or more keys in standard key are pressed. O F 0 O F 1 O F 2 O F 3 O F 4 C 0 C 1 C 2 C 3 C 4 C 5 C 6 C 7 1 1 0 0 1 0 0 0 Table 1 shows the relationship between the key matrix and the transmission code. Fig. 1 Table 1 Transmission Code Key Input D1 D0 IE0 0 0 IE1 0 1 IE2 1 0 IE3 1 1 Extended bit The extended bit is formed by input pin DATA and the scan output (OF5~OF7). Fig. 2 shows an example of extended bit selection. Transmission Code Scan Output D4 D3 D2 OF0 0 0 0 OF1 0 0 1 OF2 0 1 0 OF3 0 1 1 OF4 1 0 0 OF5 1 0 1 OF6 1 1 0 OF7 1 1 1 Transmission Code DATA Input D7 D6 D5 OF5 ¾ ¾ 1 OF6 ¾ 1 ¾ OF7 1 ¾ ¾ D A T A D A T A c o d e S W = O N S W = O F F O F 6 O F 7 D 5 1 1 D 6 1 0 D 7 0 0 S W Fig. 2 Clock oscillating circuit HT6240 has built-in feedback resistor and CMOS inverter, so a ceramic resonator can connect between the oscillator circuit input pin (OSCI) and the output pin (OSCO), (see Fig. 3). Custom code The custom code is made up of input pin DATA and scan output OF0~OF4. It has 8 bits (C0~C7); the lower 3 bits of the custom code (C5, C6 and C7) are fixed as ²0². When the ceramic resonator is set to 455kHz, the carrier can be set 38kHz. Fig. 1 shows an example of custom code selection. Rev. 1.30 O F 5 5 November 6, 2002 HT6240-002 Transmission code The oscillating circuit will stop when there is no key pressed to save power dissipation. When the resonator is 455kHz, the carrier of the transmission signal is 38kHz. One pulse width is 0.53ms. Therefore, twenty 38kHz clocks are included in the 0.53ms pulse width. (Fig.4 shows the carrier) H T 6 2 4 0 -0 0 2 O S C I C HT6240-002 has two different formats. When the custom code is equal to zero, CT will send the 1st format. Otherwise, it will send the 2nd format. O S C O C L I If the custom code (C0~C7) is ²0000 0000² then Fig. 5 shows the formation of the transmission code. Fig. 6 shows the transmission code ²0² and ²1² and pulse width. Fig. 7 shows the formation of the 1-word transmission code. If a legal key is pressed, HT6240-002 will send at least five words (see Fig. 8). L O N o te : T h e s e c a p a c ito r s d e p e n d o n th e r e s o n a to r s . U s e th e v a lu e s r e c o m m e n d e d b y th e r e s o n a to r m a n u fa c tu re r. Fig. 3 2 6 .4 m s 8 .8 m s 0 .5 3 m s Fig. 4 Carrier D 0 D 1 D 2 D 3 D 4 0 .5 3 m s D 5 D a ta c o d e B it " 0 " 2 .1 1 m s Fig. 5 Formation of the transmission code 0 .5 3 m s B it " 1 " 4 .2 2 m s Fig. 6 Transmission code ²0² and ²1² and pulse width of HT6240-002 D 0 D 1 D 2 D 3 D 4 D 5 1 w o rd 5 0 .6 m s Fig. 7 The formation of the 1-word transmission code 1 -w o rd 5 0 .6 m s 1 -w o rd 5 0 .6 m s 1 -w o rd 5 0 .6 m s 1 -w o rd 1 -w o rd 5 0 .6 m s Fig. 8 A legal key will send at least five words Rev. 1.30 6 November 6, 2002 HT6240-002 If custom code ¹ ²0000 0000² then Fig. 9 shows the formation of the transmission code. The transmission code consists of a head pulse, 8-bit custom code and 8-bit data code. Fig. 10 shows bit ²0² and bit ²1². On table 2, the relationship between the key matrix and the transmission code is shown when custom code=²0000 0000². The asterisks means that HT6240-002 can just send five words at a time even if a legal key is pressed for a long time. The others mean that HT6240-002 will send five or six words, even some more words if a legal key is still pressed. The formation of a 1-word transmission code without carrier is shown in detail in Fig.11. Output CT should combine with the carrier when CT is high. Table 2 CT will send at least three words if we press a legal key. CT may send three or four words, or several words depending on the length of time the legal key is pressed. (see Fig. 12) OF0 OF1 OF2 OF3 OF4 OF5 OF6 OF7 IE0 00 04 08 0C 10* 14* 18* 1C* IE1 01 05 09* 0D* 11* 15* 19* 1D* IE2 02 06 0A* 0E* 12* 16* 1A* 1E* IE3 03 07 0B* 0F* 13* 17* 1B* 1F* Power on reset function (PRB) The power on reset function can be activated by connecting a capacitor to PRB pin while power is applied. The time (tC) must be longer than 0.1ms when the voltage in PRB pin (VC) becomes higher than 0.3VDD after the voltage in VDD pin exceeds 2.2V. There are 64 instructions when the custom code=²0000 0000² in HT6240-002. The transmission output CT is still ²L² and the transmission code will not be sent when two or more keys are pressed simultaneously. 8 .4 4 m s When the power on reset function is activated, the standby state continues until an ²L² is input to IE0~IE3. 4 .2 2 m s 4 .2 2 m s C 0 C 1 C 2 C 3 C 4 C 5 C 6 C 7 H e a d p u ls e C u s to m D 0 D 1 D 2 D 3 D 4 D 5 D 6 D 7 c o d e D a ta c o d e Fig. 9 The formation of the transmission code when custom code ¹ ²0000 0000² 0 .5 3 m s B it " 0 " 1 .0 6 m s 0 .5 3 m s B it " 1 " 2 .1 1 m s Fig. 10 C u s to m H e a d p u ls e 8 .4 4 m s C 0 = 0 C 1 = 1 C 2 = 1 D a ta c o d e c o d e C 3 = 0 C 4 = 0 C 5 = 0 C 6 = 0 C 7 = 0 4 .2 2 m s D 0 = 0 D 1 = 0 D 2 = 0 D 3 = 0 D 4 = 1 D 5 = 0 D 6 = 0 D 7 = 0 4 .2 2 m s 1 -w o rd Fig. 11 Rev. 1.30 7 November 6, 2002 HT6240-002 1 w o rd V o lta g e 1 w o rd V D D V D D 6 7 .5 m s Fig. 12 V S S P R B p in 2 .2 V P R B p in V D D 2 0 1 0 .3 V 3 D D T im e 0 T H T 6 2 4 0 -0 0 2 C > 0 .1 m s Fig. 14 Relationship between the PRB pin and the voltage Fig. 13 Example of power-on reset function Application Circuits Example (1) S e ttin g th e c u s to m V c o d e S e ttin g D 5 , D 6 , D 7 b its D D S ta n d a rd k e y 4 7 W 1 k W V D D 2 0 1 9 V D D 1 8 C T O F 0 1 7 1 6 O F 1 1 5 O F 2 O F 3 1 4 1 3 O F 4 1 2 O F 5 1 1 O F 6 O F 7 H T 6 2 4 0 -0 0 2 V S S T E S T P R B O S C I O S C O 1 2 3 4 D A T A 5 6 IE 0 7 IE 1 8 IE 2 IE 3 9 1 0 4 5 5 K 1 0 3 4 7 1 4 7 1 "1 " "0 " o r Rev. 1.30 8 November 6, 2002 HT6240-002 Example (2) S e ttin g th e c u s to m V c o d e D o u b le - p u s h e d k e y D D S ta n d a rd k e y 4 7 W 1 k W V D D 2 0 1 9 V D D 1 8 C T O F 0 1 7 1 6 O F 1 1 5 O F 2 1 4 O F 3 O F 4 1 3 1 2 O F 5 1 1 O F 6 O F 7 H T 6 2 4 0 -0 0 2 V S S T E S T P R B O S C I O S C O 1 2 3 4 D A T A 5 IE 0 6 7 IE 1 8 IE 2 IE 3 9 1 0 4 5 5 K 1 0 3 4 7 1 4 7 1 "1 " "0 " o r ( N o c o n n e c tio n ) Rev. 1.30 9 November 6, 2002 HT6240-002 Example (3) S e ttin g c u s to m c o d e E x te n d e d k e y V D D S ta n d a rd k e y 4 7 W 1 k W V D D 2 0 1 9 V D D 1 8 C T O F 0 1 7 1 6 O F 1 1 5 O F 2 O F 3 1 4 O F 4 1 3 1 2 O F 5 1 1 O F 6 O F 7 H T 6 2 4 0 -0 0 2 V S S T E S T P R B O S C I O S C O 1 2 3 4 D A T A 5 6 IE 0 7 IE 1 8 IE 2 IE 3 9 1 0 4 5 5 K 1 0 3 4 7 1 4 7 1 "1 " "0 " o r ( N o c o n n e c tio n ) Rev. 1.30 10 November 6, 2002 HT6240-002 Example (4) V D D 4 7 W 1 k W V D D 2 0 1 9 V D D 1 8 C T O F 0 1 7 1 6 O F 1 1 5 O F 2 1 4 O F 3 O F 4 1 3 1 2 O F 5 1 1 O F 6 O F 7 H T 6 2 4 0 -0 0 2 V S S T E S T P R B O S C I O S C O 1 2 3 4 D A T A 5 6 IE 0 7 IE 1 8 IE 2 IE 3 9 1 0 4 5 5 K 1 0 3 4 7 1 4 7 1 "1 " "0 " o r ( N o c o n n e c tio n ) Rev. 1.30 11 November 6, 2002 HT6240-002 Package Information 20-pin SOP (300mil) outline dimensions 1 1 2 0 A B 1 1 0 C C ' G H D E Symbol Rev. 1.30 a F Dimensions in mil Min Nom Max A 394 ¾ 419 B 290 ¾ 300 C 14 ¾ 20 C¢ 490 ¾ 510 D 92 ¾ 104 E ¾ 50 ¾ F 4 ¾ ¾ G 32 ¾ 38 H 4 ¾ 12 a 0° ¾ 10° 12 November 6, 2002 HT6240-002 24-pin SOP (300mil) outline dimensions 1 3 2 4 A B 1 2 1 C C ' G H D E Symbol Rev. 1.30 a F Dimensions in mil Min. Nom. Max. A 394 ¾ 419 B 290 ¾ 300 C 14 ¾ 20 C¢ 590 ¾ 614 D 92 ¾ 104 E ¾ 50 ¾ F 4 ¾ ¾ G 32 ¾ 38 H 4 ¾ 12 a 0° ¾ 10° 13 November 6, 2002 HT6240-002 Product Tape and Reel Specifications Reel dimensions D T 2 A C B T 1 SOP 20W Symbol Description Dimensions in mm A Reel Outer Diameter 330±1.0 B Reel Inner Diameter 62±1.5 C Spindle Hole Diameter 13.0+0.5 -0.2 D Key Slit Width 2.0±0.5 T1 Space Between Flange 24.8+0.3 -0.2 T2 Reel Thickness 30.2±0.2 SOP 24W Symbol Description Dimensions in mm A Reel Outer Diameter 330±1.0 B Reel Inner Diameter 62±1.5 C Spindle Hole Diameter 13.0+0.5 -0.2 D Key Slit Width 2.0±0.5 T1 Space Between Flange 24.8+0.3 -0.2 T2 Reel Thickness 30.2±0.2 Rev. 1.30 14 November 6, 2002 HT6240-002 Carrier tape dimensions P 0 D P 1 t E F W C D 1 B 0 P K 0 A 0 SOP 20W Symbol Description Dimensions in mm W Carrier Tape Width 24.0+0.3 -0.1 P Cavity Pitch 12.0±0.1 E Perforation Position 1.75±0.1 F Cavity to Perforation (Width Direction) 11.5±0.1 D Perforation Diameter 1.5+0.1 D1 Cavity Hole Diameter 1.5+0.25 P0 Perforation Pitch 4.0±0.1 P1 Cavity to Perforation (Length Direction) 2.0±0.1 A0 Cavity Length 10.8±0.1 B0 Cavity Width 13.3±0.1 K0 Cavity Depth 3.2±0.1 t Carrier Tape Thickness 0.3±0.05 C Cover Tape Width 21.3 SOP 24W Symbol Description Dimensions in mm W Carrier Tape Width 24.0±0.3 P Cavity Pitch 12.0±0.1 E Perforation Position 1.75±0.1 F Cavity to Perforation (Width Direction) 11.5±0.1 D Perforation Diameter 1.55+0.1 D1 Cavity Hole Diameter 1.5+0.25 P0 Perforation Pitch 4.0±0.1 P1 Cavity to Perforation (Length Direction) 2.0±0.1 A0 Cavity Length 10.9±0.1 B0 Cavity Width 15.9±0.1 K0 Cavity Depth t Carrier Tape Thickness C Cover Tape Width Rev. 1.30 3.1±0.1 0.35±0.05 21.3 15 November 6, 2002 HT6240-002 Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, Nanshan District, Shenzhen, China 518057 Tel: 0755-8616-9908, 8616-9308 Fax: 0755-8616-9533 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 010-6641-0030, 6641-7751, 6641-7752 Fax: 010-6641-0125 Holtek Semiconductor Inc. (Chengdu Sales Office) 709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016 Tel: 028-6653-6590 Fax: 028-6653-6591 Holmate Semiconductor, Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright Ó 2002 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. Rev. 1.30 16 November 6, 2002