HT95168 HT95168 Caller ID Telephone IC Introduction The HT95168 is a high performance and low cost IC specifically designed for Caller ID telephone applications. The device contains FSK/DTMF receiver, tone/pulse dialer, LCD driver, ringer, real time clock and many more essential features. Besides, it has simple and cost-effective external components which are suitable for high volume production. Features · · · · · · · · · · · · · · · · Rev. 1.10 Operating voltage: 2.4V~5.5V DTMF/FSK dual Caller ID standard Stores a maximum of 27 incoming calls (date, time, number) Stores a maximum of 8 outgoing calls (dialing time, number) RTC Indicator (month-day-hour-minute-second) Tone/Pulse dialing 1~99 hours setting for mute function 8-digit area & long distance code screen setting Unauthorized-dialing protection Four-stage ring sound/speech volume adjustment Four-stage LCD brightness adjustment Fixed IP number dialing out (defined by hardware option) Caller ID records, check/delete/call-back Previous edit and immediately dial out Hand-free/redial/pause/flash/Add ¢0¢ call back/R key functions Provides chip and package forms 1 March 22, 2004 HT95168 Pin Assignment C O L 3 1 5 6 C O L 4 C O L 2 2 5 5 C ID IN C O L 1 3 5 4 H F C C O L 0 4 5 3 P D E T E R O W 3 5 5 2 O S C 1 R O W 2 6 5 1 O S C 2 G N D 7 5 0 X T R O W 1 8 4 9 N C R O W 0 9 4 8 V D D R O U T P 1 0 4 7 R E S R O U T N 1 1 4 6 D T M F R D E T E 1 2 4 5 N C C O M 0 1 3 4 4 N C C O M 1 1 4 4 3 H F I C O M 2 1 5 4 2 N C C O M 3 1 6 4 1 M U T E C O M 4 1 7 4 0 C ID E N C O M 5 1 8 3 9 X D P C O M 6 1 9 3 8 H K S C O M 7 2 0 3 7 N C S E G 0 2 1 3 6 S E G 1 5 S E G 1 2 2 3 5 S E G 1 4 S E G 2 2 3 3 4 S E G 1 3 S E G 3 2 4 3 3 S E G 1 2 S E G 4 2 5 3 2 S E G 1 1 S E G 5 2 6 3 1 S E G 1 0 S E G 6 2 7 3 0 S E G 9 S E G 7 2 8 2 9 S E G 8 H T 9 5 1 6 8 5 6 S S O P -A Rev. 1.10 2 March 22, 2004 HT95168 Pad Assignment P D E T E H F C 4 4 4 3 4 2 4 1 X T C ID IN C O L 4 4 6 4 5 O S C 2 C O L 3 C O L 2 4 8 4 7 O S C 1 C O L 1 C O L 0 5 0 4 9 4 0 1 R O W 1 3 9 V D D 3 8 R E S 3 7 D T M F 3 6 3 5 H F I N C 3 4 3 3 M U T E C ID E N 3 2 X D P 3 1 H K S 2 R O W 0 R O U T P R O W 3 R O W 2 G N D 5 2 5 1 3 4 R O U T N 5 R D E T E (0 ,0 ) 6 7 C O M 0 C O M 5 1 2 2 8 S E G 1 4 S E G 1 3 C O M 6 1 3 2 7 S E G 1 2 2 4 2 5 2 6 S E G 1 1 2 3 S E G 1 0 2 0 2 1 2 2 S E G 7 1 9 S E G 6 1 6 1 7 1 8 S E G 3 1 5 S E G 2 1 4 S E G 9 2 9 S E G 8 S E G 1 5 1 1 S E G 5 3 0 C O M 4 S E G 4 9 1 0 S E G 1 C O M 2 C O M 3 C O M 7 8 S E G 0 C O M 1 * The IC substrate should be connected to VSS in the PCB layout artwork. Rev. 1.10 3 March 22, 2004 HT95168 Pad Description Pad No. Pad Name I/O Configuration Option ¾ ¾ I Pull-high Resistor Input Description 1 GND Power ground 2, 3 ROW1, ROW0 4 ROUTP I/O Positive Ring sound output, volume control 5 ROUTN I/O Negative Ring sound output, volume control 6 RDETE I ¾ Key matrix row lines On-hook ring detector, off-hook lock ¢0¢ detection 7~14 COM0~COM7 O ¾ LCD common pins 15~30 SEG0~SEG15 O ¾ LCD segment pins 31 HKS I Low Active Hook detection 32 XDP O High Active Off-hook control 33 CIDEN O ¾ 34 MUTE O Low Active Mute function 35 NC ¾ ¾ No connection 36 HFI I Initial state is low Rising Edge Trigger Hand-free trigger input 37 DTMF O ¾ 38 RES I Low Active 39 VDD ¾ ¾ DTMF generator output Reset pin Power VDD 40 XT ¾ ¾ Loop filter pin 41 OSC2 O ¾ 32768kHz crystal output 42 OSC1 I ¾ 32768kHz crystal input ¾ Unauthorized-dialing detection 43 PDETE I 44 HFC O Rising Edge Trigger Hand-free control pin 45 CIDIN I ¾ Caller ID signal input 46~50 COL4~COL0 O ¾ Key matrix column lines 51, 52 ROW3, ROW2 I Pull-high Resistor Input Key matrix row lines Key Matrix Description Rev. 1.10 COL4 (46) COL3 (47) COL2 (48) COL1 (49) COL0 (50) ROW3 (51) 1 2 3 Up Pause ROW2 (52) 4 5 6 Down Set ROW1 (2) 7 8 9 Delete R Key ROW0 (3) * 0 # Check Add ¢0¢ Call back GND Call back/Redial Flash/ADJ Volume IP Hand-free 4 March 22, 2004 HT95168 Functional Description Ring Sound/Speech Volume Control · At On-hook state, press the [Volume] key to adjust the ring sound and each key for changes in the sound volume from loud, medium, low to soft. · At Off-hook state, press the [Volume] key to adjust the speech volume and each key for changes in the volume from loud, medium, low to soft. Note The initial setting for ring sound/speech volume is loud. LCD Brightness Adjustment At On-hook state, press the [Flash/ADJ] key to adjust the LCD brightness and each key for changes in the state from dim, slightly bright, average to bright. Note The initial setting for LCD brightness is slightly bright. Time Setting · At On-hook state, press the [Set] key for 2 seconds, the LCD then shows the [Month-Day-Hour-Min-Sec], first the (Month) remains in a flashing state and waiting for adjustments, then press the [Up] or [Down] key to increase or decrease the month from 1 to 12. · Press the [Set] key again, the (Day) remains in a flashing state and waiting for adjustments, then press the [Up] or [Down] key to increase or decrease the day from 1 to 31. · Press the [Set] key again, the (Hour) remains in a flashing state and waiting for adjustments, then press the [Up] or [Down] key to increase or decrease the hour from 0 to 23. · Press the [Set] key again, the (Min) remains in a flashing state and waiting for adjustments, then press the [Up] or [Down] key to increase or decrease the minute from 0 to 59 and the second will be set to zero at the same time. Note Rev. 1.10 The initial time setting is [01-01 00-00-00]. 5 March 22, 2004 HT95168 Tone/Pulse Mode Setting The HT95168 provides two kinds of dialing modes, tone mode and pulse mode. At On-hook state, press the [*] key for 2 seconds to select the dialing mode. · Tone Mode DTMF Output Frequency (Hz) Key Name %Error Specified Actual ROW3 697 698.8 +0.2% ROW2 770 766.4 -0.5% ROW1 852 847 -0.5% ROW0 941 947.8 +0.6% COL4 1209 1214.4 +0.4% COL3 1336 1331 -0.3% COL2 1477 1470 -0.4% · Pulse Mode: Pulse rate: 10pps, M/B ratio: 40:60, Pulse to Tone duration: 3.6 seconds Note The initial dialing mode setting is tone mode. Previous Edit and Immediately Dial Out The HT95168 provides previous edit for dialing convenience and the maximum edit length is 32-digit, once off-hook or hand-free the edited number will be dialed out immediately. Besides, pressing the [Call back/Redial] key or the [Add ¢0¢ Call back] key can also be dialed out directly. Unauthorized-dialing Protection Setting The meaning of [Unauthorized-dialing] is that the telephone line was illegally shunted by another phone and making the line dial out. · When the protection function is enabled, the HT95168 generates an interference signal to protect the line from being illegally used. · At On-hook state, press the [#] key for 2 seconds, then turn on the LCD [Protection] icon to enable the protection function. · Pressing again the [#] key for 2 seconds, turn off the icon to disable the function. Note Rev. 1.10 The initial setting of this function is disabled. To ensure that this function works normally for long distance conditions, fill-in or re-charge the battery. 6 March 22, 2004 HT95168 Mute Function Sometimes we need quiet and don¢t want to hear the ring sound at some situations such as during sleeping, meeting or resting. · The HT95168 provides the [Mute] function to stop the ring sound at a certain desired period. · At On-hook state, press the [*], [2], [*], [four-digit number], [#] to set the ring sound mute period. · [Four-digit number] expresses 2-digit hour with 2-digit minute, the setting range is from 99 hours with 99 minutes to 0 hour with 1 minute. · After setting, if the timer counts down to zero, the ring sound function is enabled. Note It can receive Caller ID data normally during mute period. The initial setting of this function is disabled. Area & Long Distance Code Screen Setting At On hook state, press the [*], [3], [*], [1~8 digits number], [#] to set the local area code or long distance code to store the caller ID phone number. · For example, when pressing the [*] [3] [*] [0755] [#], if there¢s an incoming call with a number 075527089253, then it will automatically screen the 0755 phone number prefix and it only stores the 27089253. · Press the [*], [3], [*], [#] to disable the screen function and the LCD shows [Loc off]. Dual System Caller ID Setting · When you plug the phone line into RJ11 jack to power-on reset the telephone, once a first caller ID incoming call occurs, the HT95168 can automatically fix the caller ID receiving format whether FSK or DTMF standard. · You can alternately change the caller ID receiving format by pressing the [*] [*] [#] input. · Each incoming call can be stored with a maximum of 14-digit phone number including one of the digits with automatically added ¢0¢ when the phone number length is more than 9-digit, except for area code set to screen ¢0¢ and mobile phone number with ¢13¢ prefix. Incoming Call Check and Call Back The HT95168 stores 27-set incoming calls and each call with 8-digit length or 21-set with 12-digit or 19-set with 14-digit length. · When the [Up] key is pressed, the LCD shows the [Incoming] icon and incoming call records through last in first out, LIFO rule from latest record to earliest record until the end pointer. Each incoming call is divided into two records, first is [Pointer-Date-Time], last is [Incoming phone number which has a maximum of 14-digit]. · Oppositely, when the [Down] key is pressed, it shows first is [Incoming phone number], last is [Pointer-Date-Time] through LIFO rule from the earliest record to the latest record until the end pointer. · Each incoming call record can be erased by pressing the [Delete] key. · Each incoming call record can be dialed out by pressing the [Call back/Redial] key or the [Add ¢0¢ Call back] key. Rev. 1.10 7 March 22, 2004 HT95168 Outgoing Call Check and Call Back The HT95168 stores 8-set outgoing calls and each call with 14-digit maximum length. · When the [Check] key is pressed, the LCD shows the [Outgoing] icon and outgoing call records through LIFO rule from the latest record to the earliest record until the end pointer. Each outgoing call is divided into two records, first is [Pointer-dialing time], last is [outgoing phone number which has a maximum of 14 digits]. · Each outgoing call record can be erased by pressing the [Delete] key. · Each outgoing call record can be dialed out by pressing the [Call back/Redial] key or the [Add ¢0¢ Call back] key. Redial The Redial memory stores the latest phone called and the maximum digits are 32. When you press the [Redial] key at off-hook state then the latest number will be dialed out immediately. Add ¢0¢ Call Back For convenience on having long distance calls, when you press the [Add ¢0¢ call back] key , it will automatically dial out and add ¢0¢ prefix number before the phone numbers which are incoming call or outgoing call or previous edit call. Flash When the [Flash] key is pressed, it will generate a 600ms break time. R Key When the [R] key is pressed, it will generate a 95ms break time. Pause Key When the [Pause] key is pressed, it will generate a 3.6 sec stop timing during Tone/Pulse dialing. Long Distance Call Lock Function When PDETE (Pad 43) is high at off-hook state, all the ¢0¢ prefixed phone numbers are inhibited to be dialed out including recently dialed, previously dialed, incoming call call-back, outgoing call call-back and add ¢0¢ call back, which means that long distance call function is locked. Hand-free The HT95168 provides hand-free function for talking convenience, which replaced the earpiece with a speaker phone. Rev. 1.10 8 March 22, 2004 HT95168 Fixed IP Number Dialing Out Setting The [IP] is abbreviation of Internet Phone, which is serviced by ISP vendors. The ISP vendors provide customers with different specific prefix phone number (namely IP number) to dial the international call or long distance call from PSTN through their dedicated Internet to PSTN for the purpose of reducing long distance cost. For dialing out convenience, the HT95168 provides 11-set popular IP numbers defined by hardware as shown below in the diode connection figure. By means of diode connection placement between COL0~COL3 and COL1~COL4, it can define 11 kinds of IP numbers as shown in the table below. Dnm ¾ D01 D02 D12 D03 D13 D23 D04 D14 D24 D34 IP No. 17909 17920 17931 17930 17921 17951 17950 17908 17911 17910 193 C O L 0 C O L 1 C O L 2 C O L 3 D 0 1 C O L 1 C O L 2 C O L 3 D 0 2 D 1 2 D 0 3 D 1 3 D 2 3 D 0 4 D 1 4 D 2 4 D 3 4 C O L 4 · At On-hook state, press the [IP on/off] key for 2 seconds, then the LCD shows [IP on] and enable the fixed IP dialing out function. Oppositely, pressing again the [IP on/off] key for 2 seconds, the LCD shows [IP off] and disable this function. · When the IP function is enabled, all long distance phone number prefixed with ²0² are automatically dialed out with a specific IP number before the original phone numbers. · For example 1, if no diode connects to Columns and IP function is enabled, checking an incoming call [02152204293] then call back this number. What is the number dialed out? The correct answer is [1790902152204293]. · For example 2, if the diode is crossed to COL1 and COL3 namely D13 and IP function is enabled, checking an outgoing call 07522829029 then call back this number. What is the number dialed out? The correct answer is 1795107522829029. Note Rev. 1.10 The initial setting is IP off. 9 March 22, 2004 HT95168 LCD Panel Configuration The advantages of the LCD panel shown below are bigger display and having a simple-clear feeling. 1 4 1 A F B G In c o m in g S 1 O u tg o in g S 2 N e w S 4 R e p e a t S 3 M e s s a g e S 5 P r o te c tio n S 6 1 2 4 G 1 G 0 M 7 M 6 M 5 M 4 1 2 3 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2B 2G 3B 3G 7G 7B 6G 6B 5G 5B 4G 4B 1G 1B COM2 2C 2E 3C 3E 7E 7C 6E 6C 5E 5C 4E 4C 1E 1C COM5 COM6 COM7 21 22 23 7F 7A 6F 6A 5F 5A 4F 4A 1F 1A COM1 2D S6 3D 7D COM4 COM4 Rev. 1.10 5 2A 2F 3A 3F COM3 Note 4 D C O M 0 C O M 1 C O M 2 C O M 3 S E G 1 5 S E G 1 4 S E G 1 3 S E S E C O C O C O C O PIN COM0 C E S 7 6D 5D S5 4D 24 COM0 COM1 COM2 1D S7 COM3 14F 14A 13F 13A 12F 12A 8A 8F 9A 9F 10A 10F 11A 11F COM5 14G 14B 13G 13B 12G 12B 8B 8G 9B 9G 10B 10G 11B 11G COM6 14E 14C 13E 13C 12E 12C 8C 8E 9C 9E 10C 10E 11C 11E COM7 14D S1 13D S2 12D 8D S4 9D S3 10D 11D The recommended optimal operating voltage for the LCD panel is 0.93VDD and choose 3V/4.5V LCD panel to fit 2-pcs or 3-pcs battery where VDD is 3.2V/4.8V. 10 March 22, 2004 HT95168 Application Circuits T R R U Z 2 0 1 C 3 1 2 0 3 /2 5 0 C 2 2 2 2 /2 5 0 C 5 2 2 2 /2 5 0 R U Z 2 1 8 1 D 1 1 4 1 4 8 R 1 0 1 0 0 k W R 1 2 1 0 0 k W R 5 9 5 1 0 k W R 6 0 5 1 0 k W D 1 D 3 D 2 D 4 P D E T E + L IN E D D R 5 5 4 7 W R 2 5 2 2 M V C 2 1 4 7 2 R 6 3 1 M 5 R 4 6 8 0 k W Q 1 A 9 2 1 C 2 3 1 0 3 R 6 7 2 2 0 k W S 1 L O C K L 6 R 4 8 2 .2 M W R 9 1 k W R 1 5 1 k W D 1 3 4 1 4 8 R 2 0 6 2 0 k W R 2 7 R 3 6 1 M W 5 1 0 k W R 5 4 1 2 M W Q 2 A 4 2 R 5 6 + 4 .3 M W E 3 2 2 0 m F C 1 1 0 3 C O N 2 C 1 4 1 5 1 R 1 4 1 .5 M W C 3 3 5 6 p F R D E T E C 2 2 1 0 3 C 2 7 2 A 1 0 2 C 7 2 A 1 0 2 R O U T P R O U T N R 7 1 0 0 k W R 3 7 1 .2 M W R 6 2 1 0 0 k W R 6 1 5 1 0 k W 1 N 4 0 0 7 X 4 G D R 3 6 8 0 k W R 1 1 5 0 k W Q 2 0 9 0 1 4 E 1 1 0 U /1 0 0 D 1 6 4 0 0 7 D 1 0 4 0 0 7 D 5 D 7 D 1 4 4 1 4 8 V V D D 1 D 2 1 4 0 0 7 Q 5 A 9 2 R 2 4 3 K 3 X D P C ID IN C ID E N E 9 2 A 1 0 4 R 6 8 1 0 M W B A T 3 V R 4 4 3 9 0 k W Q 1 9 9 0 1 4 D D Q 1 8 5 5 5 1 Q 1 7 5 4 0 1 R 2 2 1 0 0 k W Q 3 9 0 1 4 D 2 0 4 0 0 7 R 8 1 0 k W R 1 3 1 0 k W C 6 4 7 2 D T M F Q 7 A 4 2 R 5 3 3 9 k W P IN 2 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 T 2 C 1 5 1 0 3 /2 5 0 R 5 7 5 .1 k W N E S S P F R 2 2 2 0 k W Q 6 9 0 1 4 V S P 2 S P D 2 3 4 0 0 7 R 6 9 2 .2 M W D R D E T E R O U T N R O U T P G N D C ID IN P D E T E R E D T M M U T C ID E X D H K L E G D D D R 6 1 5 0 W + R E S Z 1 1 2 V R 2 6 8 2 0 W R 2 9 1 2 0 k W E 5 4 7 m F C 4 1 0 2 C 9 2 A 1 0 3 L IN E C 1 1 1 0 3 Q 8 9 0 1 4 R 2 8 2 2 k W R 1 1 3 3 k W M 2 R 7 7 5 1 0 k W R 7 4 1 M W Q 1 0 9 0 1 4 Q 1 6 9 0 1 5 R 3 0 5 1 0 k W V D 1 2 4 0 0 7 Q 9 8 5 5 0 C 1 6 1 0 3 R 3 9 5 1 0 W R 3 1 1 8 W R 3 4 1 0 0 W R 3 2 R 3 3 7 5 W 4 7 0 W H K S R 3 7 5 .1 W M 1 5 8 d b R 5 0 5 .1 k W D D H O O K V R 7 5 5 1 0 k W E 1 2 1 0 0 0 m F C 2 0 3 3 3 M U T E E 2 4 .7 m F R 5 2 2 0 R D D R 2 1 1 M W R 7 6 1 M W + C 3 2 A 1 0 3 C 1 0 2 A 1 0 3 C 1 2 1 U /2 5 0 V D 6 D 8 1 N 4 0 0 7 X 4 + R 3 8 9 .1 k W R 4 0 5 .1 k W R 4 1 1 0 0 W D 9 4 0 0 7 E 6 4 7 0 m F + G D S P E 4 0 .4 7 m F IN U S E M U T E R 4 2 1 2 0 k W G D Q 1 4 8 0 5 0 Q 1 3 8 0 5 0 R 4 7 5 1 0 W R 6 6 6 8 0 W E 7 1 0 0 m F Z 2 5 .1 V C 1 3 1 0 4 C 1 7 1 0 3 + D 1 9 4 0 0 7 R 4 6 1 0 0 k W R 5 8 1 2 0 k W C 1 9 2 2 2 R 6 4 2 2 0 W R O U T N R O U T P C 8 1 0 2 Q 1 1 9 0 1 5 R 4 5 1 k W S P 1 R 4 9 1 k W R 4 3 5 1 0 W R 1 6 2 7 0 k W IN U S E D 2 2 4 0 0 7 R 6 5 2 2 0 W L E D R 1 9 1 k W D 1 7 4 0 0 7 D 1 8 4 0 0 7 Q 1 5 9 0 1 4 + Q 1 2 9 0 1 4 R 1 8 6 8 0 W R 5 2 1 .5 k W R 5 1 6 8 0 W E 8 2 A 1 0 4 March 22, 2004 11 Rev. 1.10 + + HT95168 1 4 7 2 5 8 3 6 9 U P D O W N D E L L E D P A U S E S E T R R O W 3 R O W 2 R O W 1 R D E T E 1 2 3 4 5 6 7 8 9 1 0 1 1 1 0 T P T N T E 0 1 2 3 4 5 X 1 3 2 7 6 8 H z M U T C ID E X D H K G 1 G 1 G 1 G 1 S E S E S E S E L C D N S P E 5 4 3 2 X T V D D R E S D T M F H F I N C 5 2 1 1 2 6 G N D R O W R O W R O U R O U R D E C O M C O M C O M C O M C O M C O M 5 1 1 0 2 5 1 2 P D E T E 5 0 9 2 4 R O W 0 C O M 6 C O M 7 4 9 8 2 3 1 3 1 4 C ID IN 4 8 7 2 2 + 0 H F 4 7 6 2 1 C H K IP 4 6 H T 9 5 1 6 8 5 2 0 # V O L 2 4 5 4 1 9 0 F L A S H 0 1 3 4 4 4 3 1 8 * R D C O L C O L C O L C O L C O L 4 3 2 1 7 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 3 3 2 3 1 3 0 2 9 2 8 2 7 R 1 1 5 k W C 2 5 6 3 N E S P R E S D T M F M U T C ID E X D H K V D D C 1 4 7 2 C 3 1 0 4 R D E T E R O U T N R O U T P G N D C ID IN P D E T E R E S D T M F M U T E C ID E N X D P H K S L E D V D D P IN 1 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 C O N 1 4 March 22, 2004 12 Rev. 1.10 4 2 R O W 3 C O L 0 C O L 1 C O L 2 C O L 3 C O L 4 C ID IN H F C P D E T E O S C 1 O S C 2 1 4 1 R O W 2 0 1 6 S E G S E G S E G S E G S E G S E G S E G S E G S E G S E G S E G S E G 1 5 HT95168 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 (China) Inc. (Dongguan Sales Office) Building No. 10, Xinzhu Court, (No. 1 Headquarters), 4 Cuizhu Road, Songshan Lake, Dongguan, China 523808 Tel: 86-769-2626-1300 Fax: 86-769-2626-1311 Holtek Semiconductor (USA), Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, CA 94538 Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holtek.com Copyright Ó 2004 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. 1.10 13 March 22, 2004