r03ds0024ej0400 rev.4.00 page 1 of 6 jul 03, 2012 preliminary datasheet rna51943a, b voltage detecting, system resetting ic series description rna51943a,b are semiconductor integrated circuits designed for detecting supply voltage and resetting all types of logic circuits such as cpus. they fined extensive applications, including battery checking circuit, level detecting circuit and waveform shaping circuit. features ? few external parts ? wide supply voltage range: 2 v to 17 v ? wide application range ? ordering information part name package type package code package abbreviation taping abbreviation (quantity) surface treatment rna51943auph1 upak plzz0004ca-a up h (1,000 pcs / reel) 1 (sn-bi) rna51943buph1 upak plzz0004ca-a up h (1,000 pcs / reel) 1 (sn-bi) application ? reset circuit of pch, nch, cmos, microcomputer, cpu and mcu, reset of logic circuit, battery check circuit, switching circuit back-up voltage, leve l detecting circuit, waveform shapin g circuit, delay waveform generating circuit, dc/dc converter, over voltage protection circuit recommended operating condition ? supply voltage range: 2 v to 17 v outline and article indication part no. y: year code m: month code w: week code ? rna51943a, b 4 a 3 y w m upak 4 b 3 y w m r03ds0024ej0400 rev.4.00 jul 03, 2012
rna51943a, b preliminary r03ds0024ej0400 rev.4.00 page 2 of 6 jul 03, 2012 pin arrangement gnd output supply voltage (top view) rna51943a, b outline: plzz0004ca-a (upak) 2 3 1 block diagram gnd supply voltage output ? + 1.25v 25 a typ r1 r2 a: built-in load b: open collecto r rna51943a, b operating waveform 4.25v output undefined 0.65v supply voltage output state h l t t rna51943a, b
rna51943a, b preliminary r03ds0024ej0400 rev.4.00 page 3 of 6 jul 03, 2012 absolute maximum ratings (ta = 25c, unless otherwise noted) item symbol ratings unit conditions supply voltage v cc 18 v output sink current isink 6 ma v cc type a (output with constant current load) output voltage v o 18 v type b (open collector output) power dissipation pd 640 * 1 mw thermal derating k ? 6.4 mw/c refer to the thermal derating curve. operating temperature topr ?40 to +85 c storage temperature tstg ?55 to +125 c note: 1. 15 mm ? 25 mm ? 0.7 mmt alumina ceramic board, ta ? 25c. if ta > 25c, derate by 6.4 mw/c. electrical characteristics (ta = 25c, unless otherwise noted) ? ?l? reset type item symbol min typ max unit test conditions detecting voltage v s 4.05 4.25 4.45 v hysteresis voltage ? v s 30 50 80 mv detecting voltage temperature coefficient v s / ? t ? 0.01 ? %/c ? 370 560 type a , v cc = 5v circuit current i cc ? 340 510 ? a type b , v cc = 5v output saturation voltage vsat ? 0.2 0.4 v v cc = 4v, isink = 4ma ? 0.67 0.8 r l = 2.2k ? , vsat ? 0.4v threshold operating voltage v opl ? 0.55 0.7 v l reset type minimum supply voltage for ic operation r l = 100k ? , vsat ? 0.4v output leakage current i oh ? ? 30 na type b output load current i oc ?40 ?25 ?17 ? a type a , v cc = 5v, v o = 1/2 ? v cc output high voltage v oh v cc ?0.2 v cc ?0.06 ? v type a t phl ? 6 ? response time when v cc changes h ? l propagation delay time t plh ? 3 ? ? s response time when v cc changes l ? h
rna51943a, b preliminary r03ds0024ej0400 rev.4.00 page 4 of 6 jul 03, 2012 typical characteristics ambient temperature ta (c) 4.34 4.22 ?40 0 ?20 20 40 80 60 100 4.24 4.26 4.28 4.30 4.32 v sh v sl detection voltage v s (v) detection voltage vs. ambient temperature supply voltage v cc (v) output voltage v out (v) 1.0 0 0 0.2 0.4 0.6 0.8 1.0 0.2 0.4 0.6 0.8 ta = 25c r l = 2.2 k r l = 22 k r l = 100 k threshold operating voltage thermal derating 0 255075 85 100 150 125 ambient temperature ta (c) 900 800 700 600 500 0 100 200 300 400 power dissipation pd (mw) upak (plzz0004ca-a) output sink current isink (ma) output saturation voltage vsat (v) 0.3 0 02 1 3456 0.1 0.2 v cc = 5 v v cc = 15 v v cc = 10 v output load current vs. output voltage (rna51943a) output voltage v o (v) output load current i cc ( a) 0 0 4 8 12 16 ?10 ?20 ?30 ?40 ambient temperature ta (c) ?40 0 ?20 20 40 80 60 100 v cc = 5 v circuit current vs. ambient temperature circuit current i cc ( a) 700 0 300 200 100 500 400 600 output saturation voltage vs. output sink current v cc = 4 v rna51943a rna51943b
rna51943a, b preliminary r03ds0024ej0400 rev.4.00 page 5 of 6 jul 03, 2012 example of application circuit reset circuit of rna51943 r l v cc rna51943x reset ( reset ) logic circuit gnd gnd cd power- supply power- supply output figure 1 reset circuit of rna51943 notes: 1. if the rna5194xx and the logic circuit share a common power source, type a (built-in load type) can be used whether a pull-up resistor is included in the logic circuit or not. 2. the logic circuit preferably should not have a pull-down resistor, but if one is present, add load resistor r l to overcome the pull-down resistor. 3. it is better to use the rna5195xx series to cause a delay, but if the delay is caused by the rna5194xx, the delay capacitor cd is applied between the output and gnd. 4. when a negative supply voltage is used, the supply voltage side of rna5194xx and the gnd side are connected to gnd and the negativ e supply voltage respectively.
rna51943a, b preliminary r03ds0024ej0400 rev.4.00 page 6 of 6 jul 03, 2012 package dimensions 4.5 0.1 1.8 max 1.5 0.1 0.44 max 0.44 max 0.48 max 0.53 max 1.5 1.5 3.0 2.5 0.1 4.25 max 0.8 min 1 0.4 (1.5) (2.5) (0.4) (0.2) previous code plzz0004ca-a upak / upakv mass[typ.] 0.050g sc-62 renesas code jeita package code unit: mm package name upak
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