MC33690 Datasheet, PDF (15/24 Pages) Motorola, Inc – Standalone Tag Reader Circuit

Freescale S^Me^Cm³³i⁶c⁹o⁰nductor, Inc.
LOW VOLTAGE RESET
6V ≤ V_SUP ≤ 16V, V_SS = 0V, T_J = –40°C to +125°C, unless otherwise noted
Parameter
Symbol
Test Conditions
& Comments
Min Typ Max Unit Type
Pin LVR
1.6 Low Voltage Reset Low Threshold
1.7 Low Voltage Reset Hysteresis
V_LVRON
V_LVRH
See note ¹ and figure 11
4.1
4.35
4.6
V
50
100
150 mV
1.12 Pull-up Current
I_LVRUP
V_LVR = 2.5V
5
10
15
µA
1.13 Output Resistance in reset condition R_LVR
V_LVR = 2.5V
200
370
500
Ω
1.14 Input Low Voltage
V _{I L LV R}
0
-
0.3 x
V_DD
V
1.15 Input High Voltage
V _{I H LV R}
0.7 x
V_DD
-
V_DD
V
1. As the voltage regulator and the low voltage reset are using the same internal voltage reference, it is ensured that the low voltage reset
will only occur when the voltage regulator is out of regulation.
VDD
LVR
Figure 11 : Low voltage reset waveform
V_LVRON + V_LVRH
V_LVRON
OSCILLATOR
6V ≤ V_SUP ≤ 16V, V_SS = 0V, T_J = –40°C to +125°C, unless otherwise noted
Characteristic
Symbol
Test Condition
& Comments
Min Typ Max Unit Type
Pins XTAL1, XTAL2
8.0 Input Capacitance
C _{X TA L 1}
V_XTAL1 = 2.5V
-
5
-
pF
8.1 Voltage gain V_XTAL2 / V_XTAL1
A_OSC
V_XTAL1 = 2.5V
-
25
-
-
8.3 Clock input level
V_XTAL1
See note ¹
1.5
-
V_DD Vpp
1. This level ensures the circuit operation with a 8MHz clock. It is applied through a capacitive coupling. A 1MΩ resistor connected between
XTAL1 and XTAL2 biases the oscillator input.
© Motorola, Inc., 2002.
F^Mo^Or ^TM^Oo^Rr^Oe^LAIn^Sfo^EMrm^ICa^Ot^Nio^Dn^UCO^Tn^ORT^Sh^Pis^ROP^Dro^Ud^Cu^TSct,
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revision 4.8, 5 February 2002