D555

ALD555 ALD | Alldatasheet

Document overview

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Technical content

Operating Temperature Range * -55°C to +125°C0 °C to +70°C0 °C to +70°C 8-Pin 8-Pin 8-Pin CERDIP Small Outline Plastic Dip Package Package (SOIC) Package ALD555 DA ALD555 SA ALD555 PA

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 ADVANCED LINEAR D EVICES, INC. ALD555 HIGH SPEED CMOS TIMER GENERAL DESCRIPTION The ALD555 timer is a high performance monolithic timing circuit built with advanced silicon gate CMOS technology. It offers the benefits of high input impedance, thereby allowing smaller timing capacitors and longer timing cycle; high speed, with typical cycle time of 500ns; low power dissipation for battery operated environment; reduced supply current spikes, allowing smaller and lower cost decoupling capacitors. It is capable of producing accurate time delays and oscillations in both monostable and astable operation. It operates in the one-shot (mono- stable) 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 (pin 5). When the trigger input is below the trigger level, the output is in the high state and sourcing 2mA. When 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

• Functional equivalent to NE555 with greatly expanded high and low frequency ranges
• High speed, low power, monolithic CMOS technology
• Low supply current 100 µA typical
• Extremely low trigger, threshold and reset currents -- 1pA typical
• High speed operation -- 2MHz oscillation
• Low operating supply voltage 2 to 12V
• Operates in both monostable and astable modes
• Fixed 50% duty cycle or adjustable duty cycle CMOS, NMOS and TTL compatible input/output
• High discharge sinking current (80mA)
• Low supply current spikes PIN CONFIGURATION BLOCK DIAGRAM GROUND TRIGGER OUTPUT RESET TOP VIEW DA, PA, SA PACKAGE DISCHARGE THRESHOLD CONTROL OUTPUT (3) DISCHARGE (7) RESET (4) R S R R R TRIGGER (2) GND (1) CONTROL (5) THRESHOLD (6) (8)

ORDERING INFORMATION

• Contact factory for industrial temperature range © 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com

ALD555 Advanced Linear Devices 9-2 ABSOLUTE MAXIMUM RATINGS Supply voltage, V+ 13.2V Input voltage range -0.3V to V+ +0.3V Power dissipation 600 mW Operating temperature range PA,SA package 0 °C to +70°C DA package -55 °C to +125°C Storage temperature range -65°C to +150°C Lead temperature, 10 seconds +260°C OPERATING ELECTRICAL CHARACTERISTICS TA = 25oC V+ = +5V unless otherwise specified Parameter Symbol Min Typ Max Unit Test Conditions Supply Voltage V + 21 2 V Supply Current I S 100 180 µA Outputs Unloaded Timing error / Astable mode Initial Accuracy t err 1.0 2.2 % C = 0.1 µF Drift with Temperature 1 Δt/ΔT 10.0 ppm/ °CR A = 1KΩ Drift with Supply Voltage 1 Δt/ΔV+ 0.1 %/V R B = 1KΩ Threshold Voltage V TH 3.273 3.333 3.393 V Trigger Voltage V TRIG 1.607 1.667 1.737 V Trigger Current 2 ITRIG .001 0.2 nA Reset Voltage V RST 0.4 0.7 1.0 V Reset Current 2 IRST .001 0.2 nA Threshold Current 2 ITH .001 0.2 nA Control Voltage Level VCONT 3.273 3.333 3.393 V Output Voltage Drop (Low) VOL 0.2 0.4 V I SINK = 10mA Output Voltage Drop (High) V OH 4.2 V I SOURCE = -2mA Rise Time of Output 1 tr 15 30 ns R L = 10MΩ Fall Time of Output 1 tf 10 20 ns C L = 10pF Discharge Transistor I DL .01 nA Leakage Current Discharge Voltage Drop VDISC 0.5 1.0 V I DISCHARGE = 80mA 0.2 0.4 V I DISCHARGE = 30mA Maximum Frequency R A = 470Ω Astable Mode f MAX 1.4 2 MHz R B = 200Ω C T = 200pF Notes: 1 Sample tested parameters. 2 Consists of junction leakage currents with strong temperature dependence.

ALD555 Advanced Linear Devices 9-3 TYPICAL PERFORMANCE CHARACTERISTICS TIME DELAY IN THE MONOSTABLE MODE AS A FUNCTION OF R A AND C TIME DELAY 100ns 1 µs 1ms 1s 10s CAPACITANCE Ω 10M Ω 100M Ω1M Ω100K Ω10K Ω1K Ω 10 mF 100 nF 1 mF 100 µF 10 µF 1 µF 10 nF 1 nF 100 pF TA = 25°C 10µs 100µs 10ms 100ms 100s R A SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE 0 4 6 8 10 12 200 120 100 140 160 180 TA = - 40°C TA = + 20°C TA = + 85°C SUPPLY VOLTAGE (V) SUPPLY CURRENT (uA) 0 10 20 30 40 MINIMUM PULSE WIDTH REQUIRED FOR TRIGGERING 800 600 500 400 300 200 100 700 LOWEST VOLTAGE LEVEL OF TRIGGER PULSE ( % V+) MINIMUM PULSE WIDTH (ns) TA = 25°C V+ = 2V V+ = 5V V+= 12V DISCHARGE SINK CURRENT (mA) DISCHARGE OUTPUT SINK CURRENT AS A FUNCTION OF DISCHARGE LOW VOLTAGE DISCHARGE LOW VOLTAGE (V) 100 5.0 2.0 1.0 0.5 0.2 0.1 TA = 25°C V+ = 5V V+ = 12V V+ = 2V FREQUENCY CHANGE IN THE ASTABLE MODE AS A FUNCTION OF SUPPLY VOLTAGE SUPPLY VOLTAGE (V) 02 4 61 2 108 FREQUENCY CHANGE (%) FREE RUNNING FREQUENCY AS A FUNCTION OF R A, R B AND C FREQUENCY (Hz) 1.0 1K 10K 100K 10M 100M1M 10 mF 100 nF CAPACITANCE 100M Ω 10M Ω Ω 100K Ω 10K Ω Ω 1 mF 100 µF 10 µF 1 µF 10 nF 1 nF 100 pF 100.1 100 TA = 25°C ( RA - 2RB )

ALD555 Advanced Linear Devices 9-4 TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT SINK CURRENT (mA) OUTPUT SINK CURRENT AS A FUNCTION OF OUTPUT VOLTAGE OUTPUT VOLTAGE (V) 100 5.0 2.0 1.0 0.5 0.2 0.1 V+ = 12V V+ = 2V TA = 25°C V+ = 5V OUTPUT SOURCE CURRENT AS A FUNCTION OF OUTPUT VOLTAGE -1.0 -2.0 -5.0 -10 -20 -50 -100 -0.5 -0.2 -0.1 -1.0 OUTPUT VOLTAGE (V) (REFERENCED TO V +) OUTPUT SOURCE CURRENT (mA) V+ = 2V V+ = 12V V+ = 5V TYPICAL APPLICATIONS ASTABLE MODE OPERATION (FREE RUNNING OSCILLATOR) MONOSTABLE MODE OPERATION (ONE SHOT PULSE) Pulse Delay td = 1.1 RC ASTABLE MODE OPERATION 50% DUTY CYCLE R C 0.1µF Frequency f = 1/ (1.4 RC ) C 0.1µFR A R B Frequency f = 1.46 / (RA + 2RB)C Duty Cycle DC = RB / (RA + 2RB) TRIGGER INPUT DELAYED PULSE OUTPUT 0.1µF C R RESET