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ALD2502 Datasheet(PDF) 1 Page - Advanced Linear Devices |
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ALD2502 Datasheet(HTML) 1 Page - Advanced Linear Devices |
1 / 10 page 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.com ADVANCED LINEAR DEVICES, INC. SINGLE/DUAL PRECISION HIGH SPEED MICROPOWER TIMER ALD1502/ALD2502 BLOCK DIAGRAM (EACH TIMER) OUTPUT (3) DISCHARGE (7) RESET (4) R S R R R TRIGGER (2) GND (1) CONTROL (5) THRESHOLD (6) V+ (8) * Contact factory for leaded (non-RoHS) or high temperature versions. Operating Temperature Range * 0°C to +70°C0°C to +70°C -55°C to +125°C 8-Pin Small Outline 8-Pin Plastic 8-Pin CERDIP Package (SOIC) DIP Package Package ALD1502SAL ALD1502PAL ALD1502DA 14-Pin Small Outline 14-Pin Plastic 14-Pin CERDIP Package (SOIC) DIP Package Package ALD2502SBL ALD2502PBL ALD2502DB ORDERING INFORMATION (“L” suffix denotes lead-free (RoHS)) GENERAL DESCRIPTION The ALD1502/ALD2502 timers are high performance single/dual mono- lithic timing circuits built with advanced silicon gate CMOS technology. They offer the benefits of high input impedance, thereby allowing smaller timing capacitors and a longer timing cycle; high speed, with typical cycle time of 400ns; low power dissipation for battery operated environment; reduced supply current spikes, allowing smaller and lower cost decoupling capacitors. Each timer is capable of producing accurate time delays and oscilla- tions in both monostable and astable operation, and operates in the 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. There are three matched internal resistors (approximately 200KΩ 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 terminal. When the trigger input is below the trigger level, the output is in the high state and sourcing 2mA. When the threshold input is above 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 sinks up to 10mA. The reset input overrides all other inputs and when it is active (reset voltage less than 1V), the output is in the low state. FEATURES • High speed operation -- 2.5MHz typical oscillation at 5V • High discharge sinking current of 80mA at 5V • Guaranteed low operating supply voltage of 2V to 12V • Functional equivalent to and same pin-out as NE555/NE556 with greatly expanded high and low frequency ranges • High speed, low power, monolithic CMOS technology • Low supply current: 50µA typical for ALD1502 and100µA typical for ALD2502 • 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 • Low supply current spikes APPLICATIONS • High speed one-shot (monostable) pulse generation • Precision timing • Sequential timing • Long delay timer • Pulse width and pulse position modulation • Missing pulse detector • Frequency divider • Synchronized timer PIN CONFIGURATION SAL, PAL, DA PACKAGES 1 2 3 4 8 7 6 5 GND TRIG OUT RST V+ DISC THRES CONT ALD1502 SBL, PBL, DB PACKAGES DSC1 THRES1 CONT1 RST1 OUT1 TRIG1 GND TRIG2 OUT2 RST2 CONT2 THRES2 DSC2 V+ 2 3 4 5 6 7 9 10 11 12 13 14 1 8 ALD2502 |
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