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 a dvanced l inear d evices, i nc. ald555 block diagram 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 ald555sal ald555pal ald555da ordering information (?l? suffix denotes lead-free (rohs)) 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 200k ? 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 a typical ? extremely low trigger, threshold and reset currents:1pa typical ? high speed operation -- 2mhz oscillation ? low operating supply voltage of 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 of 80ma ? low supply current spikes pin configuration ground trigger output reset discharge threshold 7 control 3 1 2 4 6 8 5 v + 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 sal, pal, da packages
ald555 advanced linear devices 2 of 7 absolute maximum ratings supply voltage, v + 13.2v input voltage range -0.3v to v + +0.3v power dissipation 600 mw operating temperature range sal, pal packages 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 t a = 25 o c v + = +5v unless otherwise specified parameter symbol min typ max unit test conditions supply voltage v + 212 v supply current i s 100 180 a outputs unloaded timing error / astable mode initial accuracy t err 1.0 2.2 % c = 0.1 f drift with temperature 1 ? t/ ? t 10.0 ppm/ cr a = 1k ? drift with supply voltage 1 ? t/ ? v + 0.1 %/v r b = 1k ? threshold voltage v th 3.233 3.333 3.433 v trigger voltage v trig 1.607 1.667 1.737 v trigger current 2 i trig .001 0.2 na reset voltage v rst 0.4 0.7 1.0 v reset current 2 i rst .001 0.2 na threshold current 2 i th .001 0.2 na control voltage level v cont 3.273 3.333 3.393 v output voltage drop (low) v ol 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 t r 15 30 ns r l = 10m ? fall time of output 1 t f 10 30 ns c l = 10pf discharge transistor i dl .01 na leakage current discharge voltage drop v disc 0.5 1.0 v i discharge = 80ma 0.2 0.4 v i discharge = 30ma maximum frequency r a = 470 ? astable mode f max 1.4 2 mhz r b = 200 ? c t = 200pf notes: 1 sample tested parameters. 2 consists of junction leakage currents with strong temperature dependence.
ald555 advanced linear devices 3 of 7 typical performance characteristics time delay in the monostable mode as a function of r a and c time delay 100ns 1 s 1ms 1s 10s capacitance 1g ? 10m ? 100m ? 1m ? 100k ? 10k ? 1k ? 10 mf 100 nf 1 mf 100 f 10 f 1 f 10 nf 1 nf 100 pf t a = 25 c 10 s 100 s 10ms 100ms 100s r a frequency change in the astable mode as a function of supply voltage supply voltage (v) 0 24 6 12 10 8 +4 +3 +2 +1 0 -1 -2 -3 frequency change (%) -4 free running frequency as a function of r a , r b and c frequency (hz) 1.0 1k 10k 100k 10m 100m 1m 10 mf 100 nf capacitance 1 mf 100 f 10 f 1 f 10 nf 1 nf 100 pf 10 0.1 100 ( r a - 2r b ) ta = 25 c 100m ? 10m ? 1m ? 100k ? 10k ? 1k ? discharge sink current (ma) discharge output sink current as a function of discharge low voltage discharge low voltage (v) 0.01 0.02 0.05 0.1 1.0 0.5 0.2 100 50 20 5.0 2.0 1.0 0.5 0.2 0.1 10 t a = 25 c v + = 5v v + = 12v v + = 2v 0 10 20 30 40 minimum pulse width required for triggering 800 600 500 400 300 200 100 0 700 lowest voltage level of trigger pulse ( % v + ) minimum pulse width (ns) t a = 25 c v + = 5v v + =12v v + = 2v 2 supply current as a function of supply voltage 0 4 6 8 10 12 200 120 100 80 60 40 20 0 140 160 180 t a = - 40 c t a = + 20 c t a = + 85 c supply voltage (v) supply current (ua)
ald555 advanced linear devices 4 of 7 typical applications typical performance characteristics (cont'd) astable mode operation 50% duty cycle 1 2 3 4 8 7 6 5 r c 0.1 f frequency f = 1/ (1.4 r c ) v + v + astable mode operation (free running oscillator) monostable mode operation (one shot pulse) pulse delay t d = 1.1 r c 1 2 3 4 8 7 6 5 c 0.1 f r a v + v + r b frequency f = 1.46 / (r a + 2r b )c duty cycle dc = r b / (r a + 2r b ) trigger input delayed pulse output 1 2 3 4 8 7 6 5 0.1 f c r reset v + output sink current (ma) output sink current as a function of output voltage output voltage (v) 0.01 0.02 0.05 0.1 1.0 0.5 0.2 100 50 20 5.0 2.0 1.0 0.5 0.2 0.1 10 v + = 12v v + = 2v t a = 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 -0.5 -0.2 -0.1 -0.05 -0.02 -0.01 -0.2 -0.1 -1.0 output voltage (v) (referenced to v + ) output source current (ma) v + = 2v v + = 5v v + = 12v
ald555 advanced linear devices 5 of 7 8 pin plastic soic package soic-8 package drawing millimeters inches min max min max dim a a 1 b c d-8 e e h l s 1.75 0.25 0.45 0.25 5.00 4.05 6.30 0.937 8 0.50 0.053 0.004 0.014 0.007 0.185 0.140 0.224 0.024 0 0.010 0.069 0.010 0.018 0.010 0.196 0.160 0.248 0.037 8 0.020 1.27 bsc 0.050 bsc 1.35 0.10 0.35 0.18 4.69 3.50 5.70 0.60 0 0.25 ? l c h s (45 ) ? e a a 1 b d s (45 ) e
ald555 advanced linear devices 6 of 7 8 pin plastic dip package pdip-8 package drawing b 1 s b e e 1 d e a 2 a 1 a l c e 1 ? millimeters inches min max min max dim a a 1 a 2 b b 1 c d-8 e e 1 e e 1 l s-8 ? 3.81 0.38 1.27 0.89 0.38 0.20 9.40 5.59 7.62 2.29 7.37 2.79 1.02 0 5.08 1.27 2.03 1.65 0.51 0.30 11.68 7.11 8.26 2.79 7.87 3.81 2.03 15 0.105 0.015 0.050 0.035 0.015 0.008 0.370 0.220 0.300 0.090 0.290 0.110 0.040 0 0.200 0.050 0.080 0.065 0.020 0.012 0.460 0.280 0.325 0.110 0.310 0.150 0.080 15
ald555 advanced linear devices 7 of 7 8 pin cerdip package cerdip-8 package drawing a a 1 b b 1 c d-8 e e 1 e e 1 l l 1 l 2 s ? 3.55 1.27 0.97 0.36 0.20 -- 5.59 7.73 3.81 3.18 0.38 -- 0 5.08 2.16 1.65 0.58 0.38 10.29 7.87 8.26 5.08 -- 1.78 2.49 15 millimeters inches min max min max dim 0.140 0.050 0.038 0.014 0.008 -- 0.220 0.290 0.150 0.125 0.015 -- 0 0.200 0.085 0.065 0.023 0.015 0.405 0.310 0.325 0.200 -- 0.070 0.098 15 2.54 bsc 7.62 bsc 0.100 bsc 0.300 bsc e e 1 c e 1 ? s b l d b 1 e a l 2 a 1 l 1
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