Datasheet

ST7540 Electrical characteristics
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4 Electrical characteristics
Table 5. Electrical characteristics
( V
DD
= +5V, V
CC
=+9 V, V
SS
= S V
SS
= GND = 0V,-40°C ≤ T
A
≤ 85°C, T
J
< 125°C,
unless otherwise specified)
Symbol Parameter Test condition Min. Typ. Max. Unit
V
DD
Digital supply voltages
5V Digital supply
provided externally
4.75 5 5.25 V
V
CC
Power supply voltage 7.5 13.5 V
I(V
DD
)
Digital input supply
current
Transmission &
receiving mode
(MCLK = 4MHz),no load
3.5 mA
Transmission &
Receiving mode
(MCLK = OFF), no load
1.5 mA
I(V
CC
)
Power supply current
current with digital
supply provided
externally
TX mode, no load 60 mArms
RX mode 5 mArms
UVLO
Under voltage lock out
Threshold on V
CC
3.7 3.9 4.1 V
UVLO
HYS
UVLO Hysteresis on
V
CC
340 mV
Digital I/O
R
down
Internal pull down
resistor
-30% 100 +30% kΩ
R
up
Internal pull up resistor -30% 100 +30% kΩ
Digital I/O - 5V digital supply
V
IH
High logic level input
voltage
2 V
V
IL
Low logic level input
voltage
1.2 V
V
OH
High logic level output
voltage
I
OH
= -2mA
V
DD
-
0.45
V
V
OL
Low logic level output
voltage
I
OL
= 2mA
GND
+ 0.3
V
Digital I/O - 3.3V digital supply
V
IH
High logic level input
voltage
1.4 V
V
IL
Low logic level input
voltage
0.8 V