LTC2857CMS8-1-PBF 查看數據表（PDF） - Linear Technology
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LTC2857CMS8-1-PBF Datasheet PDF : 20 Pages
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LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted. (Note 2)
SYMBOL
Driver
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
|VOD|
Differential Driver Output Voltage
R = ∞, VCC = 4.5V (Figure 1)
●
VCC
V
R = 27Ω (RS485), VCC = 4.5V (Figure 1) ● 1.5
VCC
V
R = 50Ω (RS422), VCC = 4.5V (Figure 1) ●
2
VCC
V
Δ|VOD|
Change in Magnitude of Driver Differential
R = 27Ω or R = 50Ω (Figure 1)
●
Output Voltage for Complementary Output
States
0.2
V
VOC
Driver Common Mode Output Voltage
R = 27Ω or R = 50Ω (Figure 1)
●
3
V
Δ|VOC|
Change in Magnitude of Driver Common Mode R = 27Ω or R = 50Ω (Figure 1)
●
Output Voltage for Complementary Output
States
0.2
V
IOZD
Driver Three-State (High Impedance) Output DE = 0V, (Y or Z) = –7V, 12V, LTC2858-1, ●
Current on Y and Z
LTC2858-2
±10
μA
IOSD
Maximum Driver Short-Circuit Current
–7V ≤ (Y or Z) ≤ 12V (Figure 2)
●
±120 ±250
mA
Receiver
IIN
Receiver Input Current (A, B)
DE = TE = 0V, VCC = 0V or 5V, VIN = 12V ●
(Figure 3) (C, I-Grade)
DE = TE = 0V, VCC = 0V or 5V, VIN = –7V, ● –100
(Figure 3) (C, I-Grade)
125
μA
μA
RIN
Receiver Input Resistance
DE = TE = 0V, VCC = 0V or 5V, VIN = 12V ●
(Figure 3) (H-Grade)
DE = TE = 0V, VCC = 0V or 5V, VIN = –7V, ● –145
(Figure 3) (H-Grade)
250
μA
μA
RE = VCC or 0V, DE = TE = 0V,
● 96
125
kΩ
VIN = –7V, –3V, 3V, 7V, 12V (Figure 3)
(C, I-Grade)
RE = VCC or 0V, DE = TE = 0V,
● 48
125
kΩ
VIN = –7V, –3V, 3V, 7V, 12V (Figure 3)
(H-Grade)
VTH
Receiver Differential Input Threshold Voltage –7V ≤ B ≤ 12V
●
±0.2
V
ΔVTH
Receiver Input Hysteresis
B = 0V
25
mV
VOH
Receiver Output High Voltage
I(RO) = –4mA, A-B = 200mV, VCC = 4.5V ● 2.4
V
VOL
Receiver Output Low Voltage
I(RO) = 4mA, A-B = –200mV, VCC = 4.5V ●
IOZR
Receiver Three-State (High Impedance) Output RE = 5V, 0V ≤ RO ≤ VCC, LTC2856-1,
●
Current on RO
LTC2856-2, LTC2858-1, LTC2858-2
0.4
V
±1
μA
Logic
VIH
Logic Input High Voltage
VIL
Logic Input Low Voltage
IINL
Logic Input Current
DE, DI, RE, VCC = 5.5V
DE, DI, RE, VCC = 4.5V
DE, DI, RE
●
2
●
●
V
0.8
V
0
±10
μA
Supplies
ICCS
Supply Current in Shutdown Mode
ICCR
Supply Current in Receive Mode
DE = 0V, RE = VCC,
●
LTC2856, LTC2858 (C and I-Grade)
LTC2856, LTC2858 (H-Grade)
●
No Load, DE = 0V, RE = 0V, LTC2856-1, ●
LTC2856-2, LTC2858-1, LTC2858-2
0
5
μA
0
15
μA
540
900
μA
285678fe
4
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