TCA345A SIEMENS | Alldatasheet
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@ TTL-compatible @ High output current . @ Very high input impedance © Good stability due to hysteresis © Few external components Pin Configuration (top view) Pod Input 1 4 Output Ws 2 3 Ground Type Ordering Code Package MEXTCA 345A Q67000-A564 P-DIP-4 @ = Not for new design Threshold switches featuring linear, supply voltage-dependent threshold value. Inductive loads may be switched at the output without protective diode. 143 8.90
mena [Sym | Gini vates | unt Inductance at the output [to [soo mt Junction temperature T, 150 °C ‘Storage temperature range Tog —85 to 125 °c Thermal resistance system — air Rn sa 140 Kw Operating Range ‘Supply voltage Vs, 2to10 Tv Ambient temperature Ta —25 to 85 °C Characteristics Ty = 25°C Parte emer [am —[ opm | oe Current consumption at output current Ig= OMA; Vg=2V Tsu 0.55 0.80 mA =5V Tou 1.36 2.00 mA Ig=40 mA; Vg=2V Is 1.85 3.00 mA =5V Ist 7.00 9.00 mA L output voltage at Iq = 40 mA Vou mv Vg=2V Switching threshold v4 0.63% Vs | 0.66xVs | 0.69xV5 | V Vg = 2 to 10 V1) Linearity error of the switching threshold (referred to Vs = 2V) 3.0 % Hysteresis (in % of Vs) Vs= 2V ay, 60 10 15 % Hysteresis {in % of Vs) Vs=_5V AY, 60 20 % Hysteresis (in % of Vs) Vs = 10 V Av, 60 20 % Temperature response of switching threshold ppm/K ) measured with increasing input voltage Siemens Aktiengesellschaft 144
Circuit Diagram Test Circuit +V 5, ct orvsr2¥ (} 2 yi Output 2am] [|v Input © | | fon } i | | 2 _—. b+ 4 —o} BS Groung Application Circuits Twilight Switch Triangle-square Converter (switches on light at nightfall ~-+—». peg ! 9 a Res] C2retay (] ° J LL a j L_ sp es Cs GE Clock Generator tt Toa oy = tantalum [ARelay (1082) Cop. 29 100kQ [Jus mg | ‘ [Jens L__ ey Siemens Aktiengeselischaft 145
Current consumption /<,, versus Current consumption /;, versus. supply voltage ‘supply voltage ma Foam OmA ns a= 40 mA “CTT TT “ ws SITY Ps PEA t J ~HH A 7 COTA / HHH} A oe LEVEE A CODA LLY || o LZ Zann CO y » -EPEEET ; Loh 0 2 4 6 a WY i} 2 & 6 B ov —+% es Switching threshold Output voltage versus Input voltage versus output current y Supply voltage mv ? 250 Coo [TTY ng LLLP TT TTY Ye eee eos t no F HHH 4 an PL be 7 Pa fey aan), AT SanVaeun » OA Yo | Lo A Aone | mo VA =n » oo a0//4 ee ae oma —- fot » ooo Coo »7ELELI LI Q 2 4 6 8 wv ot 2 RM 40 Sl BO 20 mA at ey Siemens Aktiengesellschaft 146