CBM706PAS8

CBM706P/706R/706S/706T/708R/708S/708T OPERATION INSTRUCTION FEATURES  GENERAL DESCRIPTION The Precision supply voltage monitor CBM706P/ CBM706R/ 2.63 V (CBM706P, CBM706R, CBM708R) CBM706T and the CBM708R/ CBM708S / 2.93 V (CBM706S, CBM708S) CBM708T microprocessor supervisory circuits are suitable for monitoring either 3V or 3.3V 3.08 V (CBM706T, CBM708T) power supplies.  100µA quiescent current  200ms reset pulse width  Debounced manual reset input (MR)  Independent watchdog timer power-up,  1.6 sec timeout (CBM706P, CBM706R, conditions. CBM706S, CBM706T) operational with VCC as low as 1V.  CBM706S/ The  Superior upgrade for ADM706P/R/S/T, CBM706S/ circuitry that generate a reset output during power-down, The reset Independent and brownout output watchdog remains monitoring circuitry is also provided. This activates if the battery warning Guaranteed RESET valid with VCC = 1 V CBM706R/ CBM706T provide power supply monitoring Voltage monitor for power fail or low  CBM706P/ watchdog input does not toggle within 1.6 sec. In addition, there is a 1.25V threshold ADM708R/S/T detector for a power fail warning, low battery detection, or to monitor an additional power APPLICATIONS supply. An active low debounced MR input is also included.  Microprocessor systems  Computers The CBM706R, CBM706S, and CBM706T  Controllers are identical except for the reset threshold  Intelligent instruments  Critical microprocessor monitoring  Battery operated systems  Portable instruments monitor levels, which are 2.63V, 2.93V, and 3.08V, respectively. The CBM706P is identical to the CBM706R in that the reset threshold is 2.63V. It differs only in that it has an active high reset output. The provide CBM708R/ similar CBM708S/ functio-nality CBM708T as the CBM706R/CBM706S/CBM706T and only differ in that a watchdog timer function is not available. Instead, an active high reset output (RESET) is provided in addition to the active low (RESET) output. All devices are available in narrow 8-lead PDIP and 8-lead SOIC packages. 1 www.corebai.com CBM706P/706R/706S/706T/708R/708S/708T OPERATION INSTRUCTION FUNCTIONAL BLOCK DIAGRAMS *VOLTAGE REFERENCE = 2.63V (P/R), 2.93V (S), 3.08V (T) Figure 1. CBM706P/CBM706R/CBM706S/CBM706T * VOLTAGE REFERENCE = 2.63V (R), 2.93V (S), 3.08V (T) Figure 2. CBM708R/CBM708S/CBM708T 2 www.corebai.com CBM706P/706R/706S/706T/708R/708S/708T OPERATION INSTRUCTION SPECIFICATIONS VCC = 2.70 V to 5.5 V (CBM706P/CBM706R/CBM708R), VCC = 3.00 V to 5.5 V (CBM70XS), VCC = 3.15 V to 5.5 V (CBM70XT), TA = TMIN to TMAX unless otherwise noted. Table 1. Parameter Min Typ Max Unit Test Conditions/Comments 5.5 V 200 μA VCC < 3.6 V 150 μA VCC < 5.5 V POWER SUPPLY VCC Operating Voltage Range 1.0 Supply Current 100 LOGIC OUTPUT Reset Threshold(VRST) 2.55 2.63 2.70 V CBM706P/CBM706R/CBM708R 2.85 2.93 3.00 V CBM706S/CBM708S 3.00 3.08 3.15 V CBM706T/CBM708T Reset Threshold Hysteresis 20 RESET PULSE WIDTH 160 mV 200 280 ms CBM706P/CBM706R/CBM708R, VCC=3V VCC = 3.3 V 200 ms VCC = 5.0 V RESET OUTPUT VOLTAGE (CBM706R/CBM708R/CBM706S/CBM708S/CBM706T/CBM708T) VOH 0.8 × VCC VOL 0.3 VOH VCC−1.5V V VRST(max)