U2270B TEMIC Semiconductors, U2270B Datasheet
U2270B
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U2270B Summary of contents
Page 1
... Rev. A3, 13-Dec-96 specific distances. It also includes all signal-processing circuits which are necessary to form the small input signal into a microcontroller-compatible signal. The U2270B is well suitable to perform read operations with e5530-GT and TK5530-PP transponders and also performs read-write operations with TK5550-PP and TK5560-PP transponders. ...
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... U2270B Pin Description GND 1 Output Input CFE 6 DGND 7 COIL2 8 9844 Figure 2. Pinning Block Diagram V DV EXT S COIL1 = 1 COIL2 Driver DGND Amplifier Input Low pass filter HIPASS 2 (13) Pin Symbol HIPASS 16 1 GND 2 Output Input CFE ...
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... V the supply voltage of the antenna’s pre-driver. This voltage can also be used to operate external circuits, i.e., a microcontroller. In conjunction with an external NPN transistor, it also establishes the supply voltage of the antenna coil driver, DVS. U2270B Standby ...
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... U2270B The following section explains the 3 different operation modes to power the U2270B. 1. One-rail operation All internal circuits are operated from one 5-V power rail. (see figure 5). In this case and DV S EXT inputs not used but should also be connected to Batt that supply rail ...
Page 5
... C HP The value of the internal resistor 2 Recommended values found in the chapter “Applications”. R LPF V Ref R HIPASS Figure 10. Equivalent circuit of pin HIPASS U2270B V + 0.4 V Bias 210 k V – 0.4 V Bias V Bias 12601 R i can be assumed for selected data rates can ...
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... U2270B Schmitt Trigger The signal is processed by a Schmitt trigger to suppress m possible noise and to make the signal C compatible. The hysteresis level is 100 mV symmetrically to the dc opera- tion point. The open-collector output is enabled by a low level at OE (Pin 3 12602 OE Figure 11. Equivalent circuit of Pin OE ...
Page 7
... In this case, the standby mode can be used and an external low-current C can be supplied 5-V supply rail is available, it can be used to power the U2270B. In this case please check that the voltage is noise-free. An external power transistor is not necessary. The application depends also on the magnetic coupling situation ...
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... CFE OE IN STANDBY OUTPUT HIPASS COIL1 m 1.35 H COIL2 DGND GND Figure 14. BC639 EXT S Batt MS RF CFE COIL 2 U2270B COIL 1 Standby Output Input OE HIPASS DGND GND Figure 15. 9693 V DD Micro- controller 360 GND ...
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... C IN 1N4148 W 180 pF 470 k W 1.5 nF 100 W 4.7 k BC846 W 1.5 k TELEFUNKEN Semiconductors Rev. A3, 13-Dec-96 distances. This application is preferred if the detecting C is close to the U2270B as an additional C signal controls the adequate operating frequency EXT S Batt MS RF CFE COIL 2 U2270B COIL 1 ...
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... U2270B Absolute Maximum Ratings All voltages are referred to GND (Pins 1 and 7). Parameters/Conditions Pin Operating voltage Pin 12 Operating voltage Pins 8, 9, 10, 11 and 14 Range of input and output voltages Pins and 16 Pins 2 and 13 Output current Pin 10 Output current Pin 2 Driver output current ...
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... I 1 2.9 Batt S DRV Pins 8 and 9 V 3.1 DRV Pin 10 V 4.6 EXT dV /dT EXT I 3.5 EXT I 0.4 EXT Pin 3 121 0 f cut U2270B Typ. Max. Unit 400 220 5.4 6.3 V 4.2 mV/K 3.5 mA 3.6 4 ...
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... U2270B Dimensions in mm Package: SO16 12 (13) 94 8875 TELEFUNKEN Semiconductors Rev. A3, 13-Dec-96 ...
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... TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone 7131 67 2831, Fax number 7131 67 2423 TELEFUNKEN Semiconductors Rev. A3, 13-Dec-96 unauthorized use. U2270B 13 (13) ...