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SR/AI
SR/AP
Hardware Reference
Release r09
Page 12 of 76
3 Application Interface
3.1 Power Supply
SR require a power supply with the following characteristics:
Typical: 3,3V
DC
, min.: 2,5V
DC
, max.: 3.6V
DC
, > 80mA peak
For optimal performance a stable supply is recommended. If a regulator is to be used, it should be
a fast linear regulator placed as close as possible to the VSUP pins (E-6, F-6). Functionality has
been verified with the following type: TOREX: XC6204x332xx.
If the regulator cannot be placed close to the SR, it is recommended to place an
additional low ESR capacitor with at least 10µF as close as possible to the VSUP pins (E-6, F-6 or
C-1).
SR
XC6204-3.3
C-1,E-6,F-6
VSUP
GND:
A-7,E-7,F-7,B-[5:8],
C-[5:8],D-8,E-8,F-8
10µ + 100n + 1n
1µ
VOUT
VSS
VIN
CE
5
1
3
2
+5VDC
Figure 2: SR Example Power Supply
3.2 Power-up / -down Slew-Rate
Parameter
Min
Max
Unit
VSUP rise time rate
0
∞
µs/V
VSUP fall time rate
20
∞
Table 1: Power up/down Slew Rate Requirements
3.3 Reset
SR are equipped with circuitry for generating Power ON Reset from the internal core
voltage. A reset is generated when the core voltage falls below typically 1,88V and is released
when it rises above typically 1,92V.
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