ADVANCED LINEAR ALD1502/ALD2502 DEVICES, INC. SINGLE/DUAL PRECISION HIGH SPEED MICROPOWER TIMER GENERAL DESCRIPTION APPLICATIONS The ALD1502/ALD2502 timers are high performance single/dual mono- High speed one-shot (monostable) lithic timing circuits built with advanced silicon gate CMOS technology. pulse generation They offer the benefits of high input impedance, thereby allowing Precision timing smaller timing capacitors and a longer timing cycle high speed, with Sequential timing typical cycle time of 400ns low power dissipation for battery operated Long delay timer environment reduced supply current spikes, allowing smaller and Pulse width and pulse position lower cost decoupling capacitors. modulation Missing pulse detector Each timer is capable of producing accurate time delays and oscilla- Frequency divider tions in both monostable and astable operation, and operates in the Synchronized timer one-shot (monostable) mode or 50% duty cycle free running oscillation mode with a single resistor and one capacitor. The inputs and outputs are fully compatible with CMOS, NMOS or TTL logic. PIN CONFIGURATION There are three matched internal resistors (approximately 200K ALD1502 each) that set the threshold and trigger levels at two-thirds and one-third + respectively of V . These levels can be adjusted by using the control + GND 1 8 V terminal. When the trigger input is below the trigger level, the output is TRIG 2 7 DISC in the high state and sourcing 2mA. When the threshold input is above 3 OUT 6 THRES the threshold level at the same time the trigger input is above the trigger level, the internal flip-flop is reset, the output goes to the low state and RST 4 5 CONT sinks up to 10mA. The reset input overrides all other inputs and when SAL, PAL, DA PACKAGES it is active (reset voltage less than 1V), the output is in the low state. ALD2502 FEATURES + DSC 1 14 V 1 High speed operation -- 2.5MHz typical oscillation at 5V THRES1 2 13 DSC 2 High discharge sinking current of 80mA at 5V CONT 12 THRES 1 3 2 Guaranteed low operating supply voltage of 2V to 12V RST 4 11 1 CONT2 Functional equivalent to and same pin-out as NE555/NE556 OUT 5 10 RST with greatly expanded high and low frequency ranges 1 2 High speed, low power, monolithic CMOS technology TRIG 6 9 OUT 1 2 Low supply current: 50A typical for ALD1502 GND 7 8 TRIG 2 and100A typical for ALD2502 SBL, PBL, DB PACKAGES Extremely low trigger, threshold and reset currents: 10pA typical Operates in both monostable and astable modes Fixed 50% duty cycle or adjustable duty cycle CMOS, NMOS and TTL compatible input/output BLOCK DIAGRAM (EACH TIMER) Low supply current spikes + V (8) ORDERING INFORMATION (L suffix denotes lead-free (RoHS)) RESET (4) Operating Temperature Range * THRESHOLD (6) 0C to +70C0C to +70C -55C to +125C R R CONTROL (5) OUTPUT 8-Pin Small Outline 8-Pin Plastic 8-Pin CERDIP R (3) Package (SOIC) DIP Package Package S DISCHARGE ALD1502SAL ALD1502PAL ALD1502DA (7) TRIGGER (2) R 14-Pin Small Outline 14-Pin Plastic 14-Pin CERDIP Package (SOIC) DIP Package Package ALD2502SBL ALD2502PBL ALD2502DB GND (1) * Contact factory for leaded (non-RoHS) or high temperature versions. Rev 2.0 2010 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286 www.aldinc.comABSOLUTE MAXIMUM RATINGS + Supply voltage, V 13.2V + Input voltage range -0.3V to V +0.3V Power dissipation 600 mW Operating temperature range SAL, SBL, PAL, PBL packages 0C to + 70C DA, DB packages -55C to +125C Storage temperature range -65C to +150C Lead temperature, 10 seconds +260C OPERATING ELECTRICAL CHARACTERISTICS o + T = 25 C V = +5V unless otherwise specified A Parameter Symbol Min Typ Max Unit Test Conditions + Supply Voltage V 212 V 50 90 A Outputs Unloaded Supply Current ALD1502 I S Supply Current ALD2502 I 100 180 A S Timing error / Astable mode t 1.0 2.2 % C = 0.1F err Initial Accuracy 1 Drift with Temperature t/T 10.0 ppm/CR = 1K A 1 + Drift with Supply Voltage t/V 0.2 %/V R = 1K B Threshold Voltage V 3.233 3.333 3.433 V TH Trigger Voltage V 1.567 1.667 1.767 V TRIG 2 Trigger Current I .01 0.4 nA TRIG 0.4 0.7 1.0 V Reset Voltage V RST 2 Reset Current I .01 0.4 nA RST 2 Threshold Current I .01 0.4 nA TH Control Voltage Level V 3.233 3.333 3.433 V CONT Output Voltage Drop (Low) V 0.2 0.4 V I = 10mA OL SINK Output Voltage Drop (High) V 4.2 4.6 V I = -2mA OH SOURCE 1 Rise Time of Output t 10 20 ns R = 10M r L 1 Fall Time of Output t 10 20 ns C = 10pF f L Discharge Transistor I .01 nA DL Leakage Current Discharge Voltage Drop V 0.5 1.0 V I = 80mA DISC DISCHARGE 0.2 0.4 V I = 30mA DISCHARGE Maximum Frequency R = 470 A Astable Mode f 1.5 2.5 MHz R = 200 MAX B C =100pF T 1 Minimum Trigger Pulse Width t 50 100 ns TRIG 1 Notes: Sample tested parameters. 2 Consists of junction leakage currents with strong temperature dependence. ALD1502/ALD2502 Advanced Linear Devices 2 of 10