ST485AB 데이터 시트보기 (PDF) - STMicroelectronics
부품명
상세내역
제조사
ST485AB Datasheet PDF : 19 Pages
| |||
Electrical characteristics
4
Electrical characteristics
ST485AB
Table 6.
Symbol
DC electrical characteristics (VCC = 4.5 V to 5.5 V, TA = -40 to 85°C, unless otherwise
specified. Typical values are referred to TA = 25°C, VCC = 5 V) (Note: 1)
Parameter
Test conditions
Min. Typ. Max. Unit
ISUPPLY VCC Power supply current
CI/O Input/output capacitance
CAB Driver output capacity
No load, VRE=0 V or VCC VDE = VCC
VDE = 0 V
2.3 5 mA
2.6 5 mA
10
pF
10
pF
Table 7.
Symbol
Logic input electrical characteristics (VCC = 4.5 V to 5.5 V, TA = -40 to 85°C, unless
otherwise specified. Typical values are referred to TA = 25°C, VCC = 5 V) (Note: 1)
Parameter
Test conditions
Min. Typ. Max. Unit
VIL Input logic threshold low
DE, DI, RE
VIH Input logic threshold high DE, DI, RE
2
IIN1 Logic input current
DE, DI, RE
IIN2 Input current (A, B)
VDE=0 V,
VCC= 0 or 5.25 V
VIN=12 V
VIN=-7 V
0.8 V
V
± 2.0 µA
1 mA
-0.8 mA
Table 8.
Symbol
Transmitter electrical characteristics (VCC = 4.5 V to 5.5 V, TA = -40 to 85°C, unless
otherwise specified. Typical values are referred to TA = 25°C, VCC = 5 V) (Note: 1)
Parameter
Test conditions
Min. Typ. Max. Unit
VOD1
VOD2
ΔVOD
VOC
ΔVOC
IOSD
Differential driver output (No load)
Differential driver output (with load)
RL= 54 Ω (RS-422)
VCM= -7 V to 12 V
Change in magnitude of driver
differential output voltage for
complementary output states
(Note: 1)
RL= 27 Ω or 50 Ω
Driver common mode output
voltage
RL= 27 Ω or 50 Ω
Change in magnitude of driver
common mode output voltage
(Note: 1)
RL= 54 Ω or 100 Ω
Driver short circuit output current VO= -7 V to 12 V
5
V
1.5 2.7 5
V
0 0.2 V
1
3
V
0 0.2 V
± 250 mA
6/19
Share Link: 