XE8806A SEMTECH [Semtech Corporation], XE8806A Datasheet - Page 15

• Manufacturer Part Number: XE8806A
• Description: Ultra Low-Power Low-Voltage
• Manufacturer: SEMTECH [Semtech Corporation]

2.4.2
The speed of the flash devices is not highly dependent upon the supply voltage. However, by limiting the
temperature range, the speed can be increased. The minimal guaranteed speed as a function of the supply voltage
and maximal temperature operating temperature is given in Figure 2-4.
2.4.3
For the ROM version, two possible operating modes exist: with and without voltage regulator. Using the voltage
regulator, a 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.
© Semtech 2006
Flash circuit version XE8807AM
ROM circuit version, regulator on
Figure 2-4. Guaranteed speed as a function of the supply voltage and maximal temperature.
Figure 2-5. Supply configuration for ROM circuit operation using the internal regulator.
7
6
5
4
3
2
1
0
Figure 2-3. Supply configuration for flash circuit operation.
2
2.5
VBAT
VBAT
VREG
VREG
VSS
VSS
3
supply voltage VBAT (V)
3.5
2-5
100nF
1uF
4
85°C
2.4 - 5.5 V
4.5
2.4 - 5.5 V
45°C
5
XE8806A/XE8807A
5.5
www.semtech.com