MC68HC68T1 Datasheet, PDF (4/26 Pages) Motorola, Inc – Real-Time Clock plus RAM with Serial Interface

AC ELECTRICAL CHARACTERISTICS (TA = – 40 to + 85_C, CL = 200 pF, Input tr = tf = 6 ns, Voltages Referenced to VSS)
Symbol
Parameter
Figure
No.
VDD
V
Guaranteed
Limit
fSCK Maximum Clock Frequency (Refer to SCK tw, below)
1, 2, 3
3.0
—
4.5
2.1
6.0
2.1
tPLH,
tPHL
Maximum Propagation Delay, SCK to MISO
2, 3
3.0
200
4.5
100
6.0
100
tPLZ,
tPHZ
Maximum Propagation Delay, SS to MISO
2, 4
3.0
200
4.5
100
6.0
100
tPZL,
tPZH
Maximum Propagation Delay, SCK to MISO
2, 4
3.0
200
4.5
100
6.0
100
tTLH, Maximum Output Transition Time, Any Output (Measured Between 70% VDD
2, 3
3.0
200
tTHL and 20% VDD)
4.5
100
6.0
100
Cin Maximum Input Capacitance
—
10
Unit
MHz
ns
ns
ns
ns
pF
TIMING REQUIREMENTS (TA = – 40 to + 85_C, Input tr = tf = 6 ns, Voltages Referenced to VSS)
Symbol
Parameter
Figure
No.
tsu Minimum Setup Time, SS to SCK
1, 2
tsu Minimum Setup Time, MOSI to SCK
1, 2
th
Minimum Hold Time, SCK to SS
1, 2
th
Minimum Hold Time, SCK to MOSI
1, 2
trec Minimum Recovery Time, SCK
1, 2
tw(H), Minimum Pulse Width, SCK
1, 2
tw(L₎
tw
Minimum Pulse Width, POR
tr, tf Maximum Input Rise and Fall Times (Except XTALin and POR) (Measured
1, 2
Between 70% VDD and 20% VDD)
VDD
V
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
Guaranteed
Limit
Unit
200
ns
100
100
200
ns
100
100
250
ns
125
125
200
ns
100
100
200
ns
200
200
400
ns
200
200
—
ns
100
100
—
ms
2
2
MC68HC68T1
4
MOTOROLA