STA001 Просмотр технического описания (PDF) - STMicroelectronics
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STA001 Datasheet PDF : 20 Pages
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ELECTRICAL CHARACTERISTCS (continued)
Symbol
Parameter
Test Condition
fM_CLK1 M_CLK frequency
Using a 14.72MHz quartz
fM_CLK2 M_CLK frequency
Using a 14.725MHz quartz
ADDITIONAL DIGITAL INTERFACE (CE) (T = 25°, VDD-VSS = 3V)
(LOW=GND, HIGH=VDD)
VIH digital input signals
high
VIL
low
tr
CE power up time
tf
CE power down time
STA001
Min. Typ. Max.
14.72
14.725
Unit
MHz
MHz
VSS+1.
V
8
VSS+1. V
3
2
µs
6
µs
XOSEL, CE, TLCK, ENRFOSC TRUTH TABLE (LOW = GND, HIGH = VDD)
Pin
Type
Level
Result
CE
input
high
Chip enabled
low
Chip disabled
XOSEL
input
high
Internal Crystal oscillator selected
low
External TCXO connected on REF selected
ENRFOSC
input
high
Internal RF oscillator selected
low
External RF oscillator connected on TK1, NTK1 pins
TLCK
output
high
Synth. locked
low
Synth. unlocked
ADDITIONAL OPTIONAL INTERFACE INFORMATION (REF)
Symbol
Parameter
Test Condition
VDC REF DC voltage
XOSEL low
Rin Input resistance
XOSEL low
Min.
VDD-
1.1
Typ.
VDD-
0.9
70K
Max.
VDD-
0.7
Unit
V
Ω
9/20
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