TS68HC901 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TS68HC901' PDF : 42 Pages View PDF
TS68HC901
Figure 33 : Typical Test Load
Figure 34 : INTR Test Load
F or all outputs except DTACK
CL = 100pf
RL = 20k Ω
R1 = 1.9kΩ
For DTACK
CL = 130pf
RL = 6kΩ
R1 = 740Ω
CAPACITANCE
TA = 25°C, f = 1MHz unmeasured pins returned to ground.
Symbol
C IN
COUT
Parameter
Input Capacitance
Tri-state Output Capacitance
Test Condition
Unmeasured pins returned to
ground
Max.
10
10
Unit
pF
pF
Figure 35 : External Oscillator Components
Figure 36 : External Clock Connection.
CRYSTAL PARAMETERS :
Parallel resonance, f undament al mode AT cut
RS ≤ 150Ω (FR = 2.8 – 5.0MHz) ;
RS ≤ 300Ω (FR = 2.0 – 2.7MHz)
CL = 18pf ; CM = 0.02pf ; Ch = 5pf ; LM = 96mH
FR (typ) = 2.4576MHz
Symbol
Parameter
f
tcyc
tCL, tCH
tCr, tCf
Frequency of Operation
Cycle Time
Clock Pulse Width
Rise and Fall Times
40/42
®
OT HER POSSIBLE CONFIGURATION:
XTA L1 dri ven with a CMOS clock and XTAL2 not connec-
t ed
4MHz
Min. Max.
1.0 4.0
250 1000
110 480
-
15
Value
5MHz
Min. Max.
1.0 5.0
200 1000
90 480
-
10
CLOCK TIMING
8MHz
Min. Max.
1.0 8.0
125 1000
55 480
-
10
Unit
MHz
ns
ns
ns
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