EIB-TP-UART-IC Просмотр технического описания (PDF) - Siemens AG
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EIB-TP-UART-IC Datasheet PDF : 26 Pages
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TP-UART-IC
1.2.4 Supply Pin VCC (Pin 7)
The pin VCC delivers the internal generated voltage supply to external loads. An external
short-circuit from the VCC pin to GND will not cause a destruction of the ASIC.
Symbol Parameter
Min
Max Unit Note
VVCC Voltage supply (generated by the ASIC or external
4.75
5.25 V
1)
source in case of digital test modes)
CVCC
IVCC
External storage capacitor
External load at VCC
6,8
10
µF +/-20 %
10 mA
2)
1) VB+ ≥ 11 V
2) If there is a current leap ILeap with a slope greater than 1 mA/ms the following formulas have to be
applied:
IStat is the static current, i.e. slope not greater than 1 mA/ms
IStat ≤ 3 mA;
ILeap ≤ (3 mA – IStat) + 5 mA
3mA < IStat ≤ 5 mA;
ILeap ≤ 8 mA - IStat
IStat > 5 mA;
ILeap ≤ 3 mA
1.2.5 Receive Pin RxIN (Pin 13)
The Receive Pin RxIN is coupled to the EIB bus by an external capacitor.
Symbol Parameter
CREC external coupling capacitor
1)external capacitor 47 nF/50V ± 5%
Min
44.5
Max
49.5
Unit Note
nF typ.47 nF1)
1.2.6 Transmit Pin TxO (Pin 12)
The transmit pin is connected to EIB via external resistor of typ. 68Ω /1W (see Typical
Application Circuits).
Symbol Parameter
VTRANS transmit voltage
1) related to VB+
Min
Max Unit Note
-6
-9 V 1)
1.2.7 Supply Pin VIF (Pin 3)
The Pin VIF is used as supply voltage for the pins TxD, RxD, RESn, TSTOUT, X1, X2 and
determines their high input or output level.
Symbol Parameter
VIF external supply voltage for interface
CVIF external storage capacitor
1) Typical supply voltages: 3.3 V or 5 V
2) Recommended
Min
Max Unit Note
3
5.5
V
1)
10
nF
2)
The reproduction, transmission or use of this document or it‘s contents is not permitted without express written authority. All
rights, including right created by patent grant or registration of a utility model or design, are reserved. Technical changes
reserved.
25.15.10.41.33a
25.10.01
page 5
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