IMP690T/S/R, IMP802T/S/R, IMP80 4T/S/R, IMP805T/S/R POWER MANAGEMENT 3.0V/3.3V Microprocessor Supervisors with Battery Backup Switch Key Features The IMP690T/S/R, IMP802LT/S/R, IMP804T/S/R and IMP805T/S/R simplify power supply monitoring and control in 3V/3.3V microprocessor and battery powered systems. The circuits monitor and control the power supplied to memory, microcontrollers and microprocessors. Each circuit implements four functions: reset control, watchdog monitoring, battery-backup switching and power-failure monitoring. In addition to microprocessor reset under brownout, power-up and power-down conditions, these devices provide battery-backup switching to maintain control in power-loss situations. The important features of these four functions are: a) 200msec reset time b) 1.6 second watchdog timer with disable function c) Three threshold options: 3.075V (T devices), 2.925 (S devices) and 2.625V(R devices) d) SPDT (single-pole, double-throw) 40Ω PMOS switch connects backup power to RAM if VCC fails ◆ Design Improvement over Maxim MAX690/802/804/805 ◆ 60µA Maximum supply current (3.6V) ◆ Three precision supply-voltage monitor options — 3.075V (T devices) — 2.925V (S devices) — 2.625V (R devices) ◆ RESET and RESET outputs — 200msec reset time ◆ Battery-backup power switch on-chip — Power CMOS RAM, CMOS µP or logic ◆ Watchdog timer: 1.6sec timeout ◆ Independent 1.25V Power Fail threshold detector — Power-fail warning, low battery detection — Monitor supplies other than 3.0V/3.3V — IMP690 and IMP805: ± 4 % PFI accuracy — IMP802 and IMP804: ± 2 % PFI accuracy ◆ Small 8-pin SO and DIP packages e) 1.25V threshold power-loss comparator for general purpose voltage monitoring The auxiliary power-fail comparator with precision 1.25V reference acts as an undervoltage detector. All IMP802/804 devices have power-fail accuracy of ± 2%. The IMP690/805 power fail threshold accuracy is ± 4%. The IMP690 reset is active LOW and the IMP80x reset is active HIGH. All parts are available in 8-pin DIP and SO packages. The IMP690T/S/R, IMP805T/S/R, IMP802T/S/R, and IMP804T/S/R (-1) devices have pinouts that match the Maxim MAX690T/S/R, MAX805T/S/R, MAX802T/S/R, and MAX804T/S/R supervisors. Backup battery switching and watchdog operation match IMP’s 5V IMP690A/692A/ 805L/802L/M supervisors. IMP690T IMP805T IMP802T IMP804T IMP690S IMP805S IMP802S IMP804S IMP690R IMP805R IMP802R IMP804R Reset Threshold 3.075V 3.075V 2.925V 2.925V 2.625V 2.625V ◆ Embedded control systems ◆ Battery-operated systems ◆ Intelligent instruments ◆ Wireless communication systems ◆ PDAs and handheld equipment ◆ µP/µC power supply monitoring ◆ CMOS memory backup Selection Guide IMP Part Applications Reset Polarity Low High ● ● ● ● ● ● Reset Accuracy PFI Accuracy ● ±75mV ● ±60mV ● ±75mV ● ±60mV ● ±75mV ±4% (±50mV) ±2% (±25mV) ±4% (±50mV) ±2% (±25mV) ±4% (±50mV) ● ±60mV ±2% (±25mV) Watchdog Timer Backup-Battery Switch ● ● ● ● ● ● ● ● ● ● ● ● 690T t01.eps Daily Silver IMP www.ds-imp.com.cn 1 IMP690T/S/R, IMP802T/S/R, IMP80 4T/S/R, IMP805T/S/R Pin Configuration DIP/SO VOUT 1 VCC 2 GND 3 PFI 4 IMP690T/S/R IMP802T/S/R IMP804T/S/R IMP805T/S/R 8 VBATT 7 RESET (RESET) 6 WDI 5 PFO ( ) IMP804T/S/R and IMP805T/S/R only. 690T_04.eps Ordering Information Part Number IMP690RCPA-1 IMP690RCSA-1 IMP690REPA-1 IMP690RESA-1 IMP690SCPA-1 IMP690SCSA-1 IMP690SEPA-1 IMP690SESA-1 IMP690TCPA-1 IMP690TCSA-1 IMP690TEPA-1 IMP690TESA-1 IMP802RCPA-1 IMP802RCSA-1 IMP802REPA-1 IMP802RESA-1 IMP802SCPA-1 IMP802SCSA-1 IMP802SEPA-1 IMP802SESA-1 IMP802TCPA-1 IMP802TCSA-1 IMP802TEPA-1 IMP802TESA-1 IMP804RCPA-1 IMP804RCSA-1 IMP804REPA-1 IMP804RESA-1 IMP804SCPA-1 IMP804SCSA-1 IMP804SEPA-1 IMP804SESA-1 IMP804TCPA-1 IMP804TCSA-1 IMP804TEPA-1 IMP804TESA-1 IMP805RCPA-1 IMP805RCSA-1 IMP805REPA-1 IMP805RESA-1 IMP805SCPA-1 IMP805SCSA-1 IMP805SEPA-1 IMP805SESA-1 IMP805TCPA-1 IMP805TCSA-1 IMP805TEPA-1 IMP805TESA-1 2 Reset Threshold (V) Temperature Range Pins-Package 2.625 2.625 2.625 2.625 2.925 2.925 2.925 2.925 3.075 3.075 3.075 3.075 2.625 2.625 2.625 2.625 2.925 2.925 2.925 2.925 3.075 3.075 3.075 3.075 2.625 2.625 2.625 2.625 2.925 2.925 2.925 2.925 3.075 3.075 3.075 3.075 2.625 2.625 2.625 2.625 2.925 2.925 2.925 2.925 3.075 3.075 3.075 3.075 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 0°C to 70°C 0°C to 70°C – 40°C to 85°C – 40°C to 85°C 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO 8-pin, DIP 8-pin, SO www.ds-imp.com.cn Daily Silver IMP IMP690T/S/R, IMP802T/S/R, IMP80 4T/S/R, IMP805T/S/R Pin Description Pin Number IMP690 IMP802 IMP804 IMP805 Name 1 1 VOUT Voltage supply for RAM or other circuitry. When VCC is above the reset threshold, VOUT connects to VCC through a P-channel MOS device. If VCC falls below the reset threshold, VOUT is connected to the higher of VBATT or VCC. Connect to VCC if no battery is used. 2 2 VCC Main power supply input. 3 3 GND Ground. 4 4 PFI Power failure monitor input. PFI is connected to the internal power fail comparator that is referenced to 1.25V. When PFI is less than the power-fail-input threshold, VPFT, PFO goes LOW; otherwise, PFO remains HIGH. If this feature is unused, the PFI pin should be connected to GND or VOUT. 5 5 PFO Power-fail output. PFO is active LOW whenever the PFI pin is less than 1.25V. Leave open if unused. 6 6 WDI Watchdog input. If WDI remains HIGH or LOW for 1.6 seconds, the internal watchdog timer triggers a reset. The watchdog timer clears when reset is asserted or WDI sees a rising or falling edge. If WDI is held HIGH or LOW for longer than the watchdog timeout period, typically 1.6 seconds, reset becomes active for the reset pulse width time, tRS, of 140ms minimum. If WDI is left floating or connected to a high impedance three-state buffer the watchdog function is disabled. 7 –––– RESET Active-LOW RESET output. Pulses LOW for 200ms when the watchdog timer runs out. It remains LOW whenever VCC is below the reset threshold. It remains LOW for 200msec after either VCC rises above the reset threshold or the watchdog triggers a reset. –––– 7 RESET Active-HIGH RESET output. The inverse of RESET. 8 8 VBATT Function Auxiliary power or backup-battery input. This input has hysteresis to prevent rapid toggling between VCC and VBATT. When VCC rises above the reset threshold, VOUT reconnects to VCC. VBATT should be connected to VCC if the function is not used. VBATT may not exceed VCC by more than 0.6V. Absolute Maximum Ratings Pin Terminal Voltage with Respect to Ground VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0V VBATT . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0V All Other Inputs* . . . . . . . . . . . . . . . . . . . –0.3V to (VC C + 0.3V) Input Current at VCC . . . . . . . . . . . . . . . . . . 200mA Input Current at VBATT . . . . . . . . . . . . . . . . . 50mA Input Current at GND . . . . . . . . . . . . . . . . . 20mA Output Current: VOUT . . . . . . . . . . . . . . . Short circuit protected for up to 10 sec All Other Inputs . . . . . . . . . . . . . . . . . . . 20mA Rate of Rise: VBATT and VCC . . . . . . . . . . 100V/µs Daily Silver IMP Continuous Power Dissipation Plastic DIP (derate 9mW/°C above 70°C) . . . 800mW SO (derate 5.9mW/°C above 70°C) . . . . . . . . 500mW Storage Temperature Range . . . . . . . . . . . . . . . . . –65°C to 160°C Lead Temperature Soldering, (10 sec) . . . . . . . . 300°C * The input voltage limits on PFI and WDI may be exceeded if the current is limited to less than 10mA These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. www.ds-imp.com.cn 3 IMP690T/S/R, IMP802T/S/R, IMP80 4T/S/R, IMP805T/S/R Electrical Characteristics Unless otherwise noted, VCC = 3.17V to 5.5V for the IMP690T/802T/804T/805T, VCC = 3.02V to 5.5V for the IMP690S/802S/804S/805S, VCC = 2.72V to 5.5V for the IMP690R/802R/804R/805R, VBATT = 3.6V; and TA= TMIN to TMAX. Typical values at TA = 25°C. Parameter Symbol Conditions Operating Temperature Range Min Typ Max Units °C IMP690_C_ _ IMP802_C_ _, IMP804_C_ _, IMP805_C_ _ 0 +70 IMP690_E_ _ IMP802_E_ _, IMP804_E_ _, IMP805_E_ _ –40 +85 Operating Voltage Range, VCC, VBATT Note 1 1.1 5.5 VOUT IOUT = 5mA VCC – 0.025 VCC – 0.015 IOUT = 50mA VCC – 0.25 IOUT = 250µA, VCC > 2.5V, VBATT < VCC – 0.2V IOUT = 250µA, VBATT > 2.3V, VCC < VBATT – 0.2V VOUT in Battery- Backup Mode IS Supply Current in Battery Backup Mode IS Battery Leakage Current Reset Threshold Note 5 VRST V VCC – 0.15 VCC – 0.002 VBATT – 0.1 VBATT – 0.01 IOUT = 1mA, VBATT > 2.3V, VCC < VBATT – 0.2V Supply Current Excluding IOUT V VBATT – 0.02 VCC < 3.6V 25 VCC < 5.5V 35 Note 2 5.5V > VCC > VBATT + 0.2V. Note 3 & 4, TA = 25°C –20 60 80 µA 20 nA V IMP690T, IMP805T, VCC falling 3.00 3.075 3.15 3.00 3.085 3.17 IMP690S, IMP805S, VCC falling 2.85 2.925 3.00 IMP690S, IMP805S, VCC rising 2.85 2.935 3.02 IMP690R, IMP805R, VCC falling 2.55 2.625 2.70 IMP690R, IMP805R, VCC rising 2.55 2.635 2.72 IMP802T, IMP804T, VCC falling 3.00 3.075 3.12 IMP802T, IMP804T, VCC rising 3.00 3.085 3.14 IMP802S, IMP804S, VCC falling 2.88 2.925 3.00 IMP802S, IMP804S, VCC rising 2.88 2.935 3.02 IMP802R, IMP804R, VCC falling 2.59 2.625 2.70 IMP802R, IMP804R, VCC rising 2.59 2.635 2.72 140 200 280 tRS RESET Output Voltage VOH ISOURCE = 800µA, 4.5V < VCC < 5.5V µA 10 IMP690T, IMP805T, VCC rising Reset Pulse Width V VCC – 1.5V ms V VOL ISINK = 3.2mA, 4.5V < VCC < 5.5V VOH ISOURCE = 500µA, VRST (MAX) < VCC < 3.6V VOL ISINK = 1.2mA, VRST (MAX) < VCC < 3.6V 0.3 VOL ISINK = 50µA, VCC = 1.1V 0.3 VOL ISINK = 100µA, VCC = 1.2V 0.3 0.4 0.8VCC 690T_t02.eps 4 www.ds-imp.com.cn Daily Silver IMP IMP690T/S/R, IMP802T/S/R, IMP80 4T/S/R, IMP805T/S/R Electrical Characteristics Unless otherwise noted, VCC = 3.17V to 5.5V for the IMP690T/802T/804T/805T, VCC = 3.02V to 5.5V for the IMP690S/802S/804S/805S, VCC = 2.72V to 5.5V for the IMP690R/802R/804R/805R, VBATT = 3.6V; and TA= TMIN to TMAX. Typical values at TA = 25°C. Parameter RESET Output Voltage Min Symbol Conditions VOH ISOURCE = 800µA, 4.5V < VCC < 5.5V VOL ISINK = 3.2mA, 4.5V < VCC < 5.5V VOH ISOURCE = 500µA, VRST (MAX) < VCC < 3.6V VOL ISINK = 1.2mA, VRST (MAX) < VCC < 3.6V Watchdog Timeout tWD VCC < 3.6V WDI Pulse Width tWP WDI Input Current WDI Input Threshold VIH PFI Input Threshold VPFT VIL Max VCC – 1.5V Units V 0.4 0.8VCC 0.3 1.12 1.60 100 20 WDI = VCC WDI = 0V 2.24 s 150 µA ns –150 Logic HIGH 0.7VCC V 0.3VCC Logic LOW VCC = 3.6V, IMP690, IMP805 1.187 1.25 1.287 VCC = 3.6V, IMP802, IMP804 1.212 1.25 1.262 –25 0.01 25 PFI Input Current PFO Output Current Typ VOH ISOURCE = 800µA, 4.5V < VCC < 5.5V VOL ISINK = 3.2mA, 4.5V < VCC < 5.5V VOH ISOURCE = 500µA, VRST (MAX) < VCC < 4.5V VOL ISINK = 1.2mA, VRST (MAX) < VCC < 4.5V VCC – 1.5V V nA V 0.4 0.8VCC 0.3 690T_t03.eps Notes: 1. The following are tested at VBATT = 3.6V and VCC = 5.5V: VCC supply current, watchdog functionality, logic input leakage, PFI functionality, and the RESET and RESET states. The state of RESET or RESET and PFO is tested at VCC = VCC (MIN). 2. Tested at VBATT = 2.8V, VCC = 2.3V and 0V 3. Leakage current into the battery is tested under the following worst-case conditions: VCC = 5.5V, VBATT = 1.8V, and at VCC = 1.5V, VBATT = 1.0V. 4. "-" equals the battery-charging current and "+" equals the battery-discharging current. 5. The reset threshold tolerance is wider for VCC rising than for VCC falling to accommodate the 30mV typical hysteresis, which prevents internal oscillation. Daily Silver IMP www.ds-imp.com.cn 5 IMP690T/S/R, IMP802T/S/R, IMP80 4T/S/R, IMP805T/S/R Application Information The IMP690T/S/R, IMP802T/S/R, IMP804T/S/R and IMP805T/S/R monitor system power supplies, generate power failure signals and issue reset signals to the system controller. Four key functions are provided: 1. A battery backup switch for CMOS processors, logic or memory. 2. A reset signal if the watchdog timer is not reset by the system processor. 3. A Reset signal during power-up, power-down and brownout conditions. 4. An independent 1.25V threshold comparator for power-fail warning, low battery detection, or for monitoring voltages other than 3.0/3.3V. Reset Output It is important to initialize a microprocessor to a known state. The IMP690T/S/R, IMP802T/S/R, IMP804T/S/R and IMP805T/S/R devices assert a reset during power-up, power-down and brownout conditions. The reset output of these supervisory circuits send a reset pulse to the microprocessor in response to power-up, power-down/power-loss or a watchdog time-out. The reset pulse width, tRS, is typically around 200msec. The reset signal is active LOW for the IMP690/IMP802 and active HIGH for the IMP804/IMP805. The watchdog timer can also generate a reset signal. RESET guaranteed to be a logic LOW for 0V< VCC < VRST if VBATT is greater than 1.1V. RESET is valid for VCC >1.1V if no backup battery is used. Once VCC is above the reset threshold, RESET remains LOW for the reset timeout period, typically 200msec, and then returns HIGH. Timing is shown in Figure 2. Power-up reset occurs when a rising VCC reaches the reset threshold, forcing a reset condition in which the reset output is asserted for the duration of tRS. Power-loss or "brown-out" reset occurs when VCC dips below the reset threshold resulting in a reset assertion for the duration of tRS. The reset signal remains asserted as long as VCC is between VRT and 1.1V, the lowest VCC for which these devices can provide a guaranteed logic-low output. A watchdog timeout reset occurs when a logic "1" or logic "0" is continuously applied to the WDI pin for a period that exceeds the watchdog timeout period (typically 1.6 seconds). After the duration of the reset interval, the watchdog timer starts a new 1.6-second timing interval. The system microprocessor must reset the internal watchdog timer by changing states at the WDI input. If the WDI pin is held either HIGH or LOW, a reset pulse will be triggered every 1.8 seconds (the 1.6-second timing interval plus the 200msec reset pulse width, tRS). + 5V VBATT 8 1 Battery-Switchover Circuit 2 VCC Reset Generator 7 + VCC + 0V VOUT RESET (RESET) + 5V VOUT 3.0V + 0V + tRS 1.25V 0.7VCC + 5V Watchdog Timer RESET + + + 0V 6 + 5V WDI + + 4 1.25V + PFI 3.0V + 0V 5 + 0.16VCC (RESET) PFO + 5V PFO IMP690, IMP802, IMP804, IMP805 + 0V ( ) IMP804/5 3 GND 690T_01.eps ( ) IMP804/5 Figure 1. Block Diagram 6 690T_02.eps Figure 2. Timing Diagram www.ds-imp.com.cn Daily Silver IMP IMP690T/S/R, IMP802T/S/R, IMP80 4T/S/R, IMP805T/S/R Application Information Watchdog Input VBATT The watchdog circuit monitors microprocessor activity. It can be used to insure that the microprocessor is in a continually responsive state by requiring that the WDI pin be toggled every 1.6 seconds typically. If the WDI pin is not toggled within the 1.6 second, a reset pulse will be asserted. If WDI is tied HIGH or LOW, a reset pulse is triggered every 1.8 seconds (tWD + tRS). SW1 IMP690 IMP804 VCC SW2 D1 D2 IMP802 IMP805 The IMP690/802/804/805 watchdog function can be disabled by open circuiting the WDI pin and allowing it to float. Backup-Battery Switchover A power loss can be made less severe if the system RAM contents are preserved or other critical low power logic is powered. This is achieved in the IMP690/802/804/805 by switching from the failed VCC to an alternate power source connected at VBATT when VCC is less than the reset threshold voltage (VCC < VRST), and VCC is less than VBATT. Switchover Reference Conditions for VOUT = VBATT RESET Threshold VBATT > VCC AND VCC < VRST SW3 SW4 D3 VOUT CONDITION VCC > Reset Threshold VCC < Reset Threshold and VCC > VBATT VCC < Reset Threshold and VCC < VBATT SW1/SW2 SW3/SW4 Open Closed Open Closed Closed Open 690T_03.eps Figure 3. Internal device configuration of battery switch-over function 690T_t04.eps For IMP devices, whenever VCC > VRST, VOUT is switched back to VCC. There is hysteresis in the switchover circuit. The VOUT pin is normally connected to VCC through a 3Ω PMOS switch but a brownout or loss of VCC will cause a switchover to VBATT by means of a 40Ω PMOS switch. Although both conditions (VCC <VRST and VCC < VBATT) must occur for the switchover to VBATT to occur, VOUT will be switched back to VCC when VCC exceeds VRST irrespective of the voltage at VBATT. It should be noted that an internal device diode (D1 in Figure 3) would be forward biased if VBATT exceeds VCC by more than a diode drop when VCC is switched to VOUT. Because of this, it is recommended that VBATT be no greater than VRST + 0.6V (see Table 2). Backup Power Sources Battery voltage selection is important to insure that the battery does not discharge through the parasitic device diode D1 (see Figure 3) when VCC is less than VBATT and VCC > VRST. Table 2: Maximum Battery Voltages Part No. Maximum Battery Voltage IMP690/802/804/805T VRST (MAX) + 0.6V (3.75V) IMP690/802/804/805S VRST (MAX) + 0.6V (3.525V) IMP690/802/804/805R VRST (MAX) + 0.6V (3.225V) 690T_t05.eps Power-Fail Comparator The Power Fail feature is an independent voltage monitoring function that can be used for any number of monitoring activities. For example, the PFI function can provide an early sensing of power supply failure by sensing the unregulated DC voltage ahead of the regulated supply sensing seen by the backup-battery switchover circuitry. The PFI pin is compared to a 1.25V internal reference. If the voltage at the PFI pin is less the power fail threshold, VPFT, the PFO goes LOW. The PFI input voltage is often set by a voltage divider from the monitored supply. The PFI comparator operates without hysteresis. Daily Silver IMP www.ds-imp.com.cn 7 IMP690T/S/R, IMP802T/S/R, IMP80 4T/S/R, IMP805T/S/R Package Dimensions Plastic DIP (8-Pin) Millimeters Inches Min Max M in Max Plastic DIP (8-Pin)* D1 E D E1 A A2 L A1 0°–15° e C b2 eA eB b Plastic DIP (8-Pin)a.eps SO (8-Pin) 0°– 8° A A1 A2 b b2 b3 D D1 E E1 e eA eB eC L 0.210 ––––– 0.195 0.022 0.070 0.045 0.400 ––––– 0.325 0.280 ––––– ––––– 0.430 0.060 0.150 ––––– 0.015 0.115 0.014 0.045 0.030 0.355 0.005 0.300 0.240 0.100 0.300 ––––– ––––– 0.115 5.33 ––––– 4.95 0.56 1.78 1.14 10.16 ––––– 8.26 7.11 –––– 0.38 2.92 0.36 1.14 0.80 9.02 0.13 7.62 6.10 2.54 7.62 ––––– 10.92 2.92 3.81 SO (8-Pin)** L E H C D A A A1 B C e E H L D 0.053 0.004 0.013 0.007 0.069 0.010 0.020 0.010 1.35 0.10 0.33 0.19 0.157 0.244 0.050 0.197 3.80 5.80 0.40 4.80 0.050 0.150 0.228 0.016 0.189 1.27 * JEDEC Drawing MS-001BA ** JEDEC Drawing MS-012AA e B A1 1.75 0.25 0.51 0.25 4.00 6.20 1.27 5.00 690T_t06.eps SO (8-Pin).eps Daily Silver IMP Microelectronics Co.,Ltd 7 keda Road , Hi-Tech Park, NingBo,Zhejiang, P.R.C. Post Code : 315040 Tel:(086)-574-87906358 Fax:(086)-574-87908866 e-mail:[email protected] Website:www.ds-imp.com.cn The IMP logo is a registered trademark of Daily Silver IMP. All other company and product names are trademarks of their respective owners. 2005 Daily Silver IMP Revision : A Issue Date: 08/08/05 Type: Product