SX8801R View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SX8801R' PDF : 135 Pages View PDF
XE8801A – SX8801R
All specifications in this document are valid for the complete operating range unless otherwise specified.
Table 2-4. Operating range of the Flash memory
Retention time at 85°C
Retention time at 55°C
Number of programming cycles for production
Number of programming cycles for development
Min. Typ.
Note
10
years 1
100
years 1
10
200
2
1. Valid only if programmed using a programming tool that is qualified
2. Circuits can be programmed more than 10 times but in that case the retention time is no longer
guaranteed.
2.3 Supply configurations
2.3.1
Flash circuit
The flash version of the circuit can be run from a supply between 2.4V and 5.5V (Figure 2-1). The capacitor on
VREG has to be connected at all times (value in Table 2-2) to guarantee proper operation of the device. The
capacitor on VMULT is only required if the circuit is to be operated below 3V.
VBAT
VREG
VMULT
VSS
Cvmult
Cvreg
2.4V – 5.5V
Figure 2-1. Supply configuration for the flash circuit.
2.3.2
ROM circuit
For the ROM version, two possible operating modes exist: with and without voltage regulator. Using the voltage
regulator, low power consumption will be obtained even with supply voltages above 2.4V. Without the voltage
regulator (i.e. VREG short-circuited to VBAT), a higher speed can be obtained.
2.1.3.1 Low power operation
In this case, the internal voltage regulator is used in order to maintain a low power consumption independent from
the supply voltage. The capacitor on VREG has to be connected at all times (value in Table 2-3) to guarantee
proper operation of the device. The capacitor on VMULT has to be connected only when VBAT<3V.
© Semtech 2005
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2-3
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