ADVANCED LINEAR ALD4501 DEVICES, INC. QUAD PRECISION HIGH SPEED MICROPOWER TIMER GENERAL DESCRIPTION APPLICATIONS. The ALD4501 timer is a high performance QUAD monolithic timing High speed one-shot (monostable) circuit built with advanced silicon gate CMOS technology. It offers the pulse generation benefits of high input impedance, thereby allowing smaller timing Precision timing capacitors and longer timing cycle high speed with typical cycle time of Sequential timing 500ns low power dissipation for battery operated environment and Long delay timer reduced supply current spikes allowing smaller and lower cost decoupling Pulse width and pulse position capacitors. Each of the four timers can be independently operated in modulation either the monostable, astable, or 50% duty cycle mode. Missing pulse detector Frequency divider Each timer is capable of producing accurate time delays and oscillations Synchronized timer in both monostable and astable operation. It 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. PIN CONFIGURATION There are three matched internal resistors (approximately 200K each) that set the threshold and trigger levels at two-thirds and one-third RST 1 20 V+ + 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 DSC 2 19 OUT 1 1 in the high state and sourcing 2mA. When the threshold input is above TRIG 3 18 THRES 1 1 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 DSC 4 17 OUT 2 2 sinks up to 10mA. The reset input overrides all other inputs and when TRIG 5 16 THRES it is active (reset voltage less than 1V), the output is in the low state. All 2 2 four timers share the same control and reset pins so that timing functions DSC 6 15 OUT 3 3 are synchronized. TRIG 7 THRES 3 14 3 FEATURES DSC 8 OUT 4 13 4 High speed operation -- 2MHz typical oscillation at 5V TRIG 9 12 THRES 4 4 Each discharge output sinking current: 40mA at 5V Guaranteed low operating supply voltage of 2 to 12V - V 10 11 CONT Each timer is functionally equivalent to NE555 with greatly expanded high and low frequency ranges SEL, PEL, DE PACKAGES High speed, low power, monolithic CMOS technology Low supply current: 150A typical Extremely low trigger, threshold and reset currents: 10pA typical Operates in both monostable and astable modes BLOCK DIAGRAM (EACH TIMER) Fixed 50% duty cycle or adjustable duty cycle CMOS, NMOS and TTL compatible input/output Low supply current spikes + V RESET THRESHOLD R R CONTROL ORDERING INFORMATION (L suffix denotes lead-free (RoHS)) OUTPUT R Operating Temperature Range * DISCHARGE 0C to +70C0C to +70C -55C to +125C S TRIGGER 20-Pin Small Outline 20-Pin Plastic 20-Pin CERDIP R Package (SOIC) DIP Package Package ALD4501SEL ALD4501PEL ALD4501DE V- * 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 SEL, PEL packages 0C to + 70C DE package -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 Supply Current I 150 270 A Outputs Unloaded S Timing error / Astable mode t 1.0 2.6 % 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 0.1 %/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 Reset Voltage V 0.4 0.7 1.0 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 = 40mA DISC DISCHARGE 0.2 0.4 V I = 15mA DISCHARGE Maximum Frequency R = 470 A Astable Mode f 2 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. ALD4501 Advanced Linear Devices 2 of 7