Datasheet

SCE5740, SCE5741, SCE5742, SCE5743, SCE5744, SCE5745
2006-03-30 4
Input/Output Circuits
Figures „Inputs“ and „Clock I/O“ show the input and output resis-
tor/diode networks used for ESD protection and to eliminate sub-
strate latch-up caused by input voltage over/under shoot.
Inputs
Clock I/O (SCE574X only)
Electrical Characteristics (over operating temperature)
Parameter Min. Typ. Max. Units Conditions
V
CC
4.5 5.0 5.5 V —
I
CC
(Power Down)
1) 2)
— — 50 µA V
CC
=5.0 V, all inputs=0 V or V
CC
I
CC
4 digits 20 dots/character
3)
90 115 130 mA V
CC
=5.0 V, “#” displayed in all 4 digits
at 100% brightness at 25
°C
I
IL
Input current — — –10 µA V
CC
=5.0 V, V
IN
=0 (all inputs)
I
IH
Input current
—
— 10 µA V
CC
=V
IN
=5.0 V (all inputs)
V
IH
3.5 — — V V
CC
=4.5 V to 5.5 V
V
IL
— — 1.5 V V
CC
=4.5 V to 5.5 V
Row Multiplex Rate 375 768 1086 Hz —
θ
JC-pin
— — 45 °C/W —
Notes:
1)
Unused inputs must be tied high.
2)
External oscillator must be stopped.
3)
Peak current
5
/
3
x I
CC.
Electrical Characteristics for SCE574x only
Parameter Min. Typ. Max. Units Conditions
I
OH
(CLK I/O) — –28 — mA V
CC
=4.5 V, V
OH
=2.4 V
I
OL
(CLK I/O) — 23 — mA V
CC
=4.5 V, V
OL
=0.4 V
F
ext
External Clock Input
Frequency
120 — 3 MHz V
CC
=5.0 V, CLKSEL=0
F
osc
Internal Clock Input
Frequency
120 — 347 kHz V
CC
=5.0 V, CLKSEL=1
Clock I/O Bus Loading — — 240 pF —
Clock Out Rise Time — — 500 ns V
CC
=4.5 V, V
OH
=2.4 V
Clock Out Fall Time — — 500 ns V
CC
=4.5 V, V
OH
=0.4 V
IDCD5021
GND
1 k
ΩInput
CC
V
V
CC
1 KΩ
GND
input/output