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TCA305A-TCA305G-TCA355G
Function and Industrial ICs
SIEMENS
Proximity Switch
Features
0 Lower open-loop current consumption; Is < 1 mA
0 Lower output saturation voltage
0 The temperature dependence of the switching
distance is lower and compensation of the resonant
circuit TC (temperature coefficient) is easier
0 The sensitivity is higher, so that larger switching
distances are possible and coils of a lower quality can
be used
0 The switching hysteresis remains constant as regards
temperature, supply voltage and switching distance
0 The TCA 305 even functions without external
integrating capacitor. With an external capacitor (or
with RC combination) good noise immunity can be
achieved
0 The outputs are temporarily short-circuit proof (approx.
10 s to 1 min depending on package)
0 The outputs are disabled when Vs < approx. 4.5 V and
are enabled when the oscillator stabilizes
(from Vs min = 5 V)
0 Higher switching frequencies can be obtained
0 Miniature package
TCA 305
TCA 355
Bipolar IC
P-DSO-8-1
P-DlP-14-1
P-DSO-14-1
Type Ordering Code Package
Cl TCA 305 A Q67000-A2291 P-DIP-14-1
TCA 305 G Q67000-A2305 P-DSO-14-1 (SMD)
TCA 355 G Q67000-A2444 P-DSO-8-1 (SMD)
Cl Not for new design
Semiconductor Group 1
SIEMENS TCA 305
TCA355
TCA 305 A TCA 355 G
[END LI Cl 14 Cl Hysteresis GNDEE1 8 =1Hyster'esis
DwsmnceEE 2 7 :EIOschLator
Distance L 2 13 :l OSCIttutor 53537533: 3 6 II Vs
t T EOutputEEA 5 :ElQOutput
In Egra log IEPOOSOS
Copodtonce Ls 12 L] Osmltutor
NC. L 4 ll I] vs
60mm Ls 10 Il VREF
END l: 6 9 :l Turn-UN-Detuy
OUUTDUT Ly 81M.
IEPOOBOZ
TCA 305 G
GNDEE1 M :ElHysterests
DtstunceEI: 2 13 EOSULLGTOF
Integrating
Cupomtunceu: 3 12 :ElemLtutor
N C :1: 4 11:: 4/5
Eautpmuzs 10::th
ENDEI: 6 9 =1Turn-0N-0eruy
QOutputEE7 BIDNC
IEPOOBOA
Pin Configurations (top view)
The devices TCA 305 and TCA 355 contain all the functions necessary to design inductive
proximity switches. By approaching a standard metal plate to the coil, the resonant circuit is
damped and the outputs are switched.
Operation Schematic: see TCA 205
The types TCA 305 and TCA 355 have been developed from the type TCA 205 and are out-
standing for the following characteristics:
Logic Functions
Oscillator Outputs
not damped H L
damped L H
Semiconductor Group 2
