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参数资料
| 型号： | LTC2845IUHF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | Buffer和线驱动 |
| 英文描述： | 3.3V Software-Selectable Mutiprotocol Transceiver; Package: QFN; No of Pins: 38; Temperature Range: -40°C to +85°C |
| 中文描述： | 5 LINE TRANSCEIVER, PQCC38 |
| 封装： | 5 X 7 MM, PLASTIC, QFN-38 |
| 文件页数： | 14/20页 |
| 文件大小： | 245K |
| 代理商： | LTC2845IUHF |
3
LTC2845
sn2845 2845fs
The q denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at TA = 25°C. VCC = 5V, VIN = 3.3V, VDD = 8V, VEE = – 7V for V.28, – 5.5V for V.10, V.11
(Notes 2, 3)
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IEE
VEE Supply Current (DCE Mode,
RS530, RS530-A, X.21 Modes, No Load
2
mA
All Digital Pins = GND or VIN)
RS530, X.21 Modes, Full Load
23
mA
RS530-A, Full Load
34
mA
V.28 Mode, No Load
1
mA
V.28 Mode, Full Load
12
mA
No-Cable Mode
10
A
IDD
VDD Supply Current (DCE Mode,
RS530, RS530-A, X.21 Modes, No Load
0.3
mA
All Digital Pins = GND or VIN)
RS530, RS530-A, X.21 Modes, Full Load
0.3
mA
V.28 Mode, No Load
1
mA
V.28 Mode, Full Load
13.5
mA
No-Cable Mode
10
A
IVIN
VIN Supply Current (DCE Mode,
All Modes Except No-Cable Mode
650
A
All Digital Pins = GND or VIN)
PD
Internal Power Dissipation (DCE Mode,
RS530, RS530-A, X.21 Modes, Full Load
240
mW
All Digital Pins = GND or VIN)
V.28 Mode, Full Load
64
mW
Logic Inputs and Outputs
VIH
Logic Input High Voltage
q
2V
VIL
Logic Input Low Voltage
VCC = 5V
q
0.8
V
R4EN when VCC = 3.3V
0.5
V
IIN
Logic Input Current
D1, D2, D3, D4, D5
q
±10
A
M0, M1, M2, DCE, D4ENB, R4EN = GND
q
–30
–75
–120
A
M0, M1, M2, DCE, D4ENB, R4EN = VIN
q
±10
A
VOH
Output High Voltage
IO = –3mA
q
2.7
3
V
VOL
Output Low Voltage
IO = 1.6mA
q
0.2
0.4
V
IOSR
Output Short-Circuit Current
0V
≤ VO ≤ VIN
q
±50
mA
IOZR
Three-State Output Current
M0 = M1 = M2 = VIN, VO = GND
q
–30
–85
–160
A
M0 = M1 = M2 = VIN, VO = VIN
q
±10
A
V.11 Driver
VODO
Open Circuit Differential Output Voltage
RL = 1.95k (Figure 1)
q
±5V
VODL
Loaded Differential Output Voltage
RL = 50 (Figure 1)
0.5VODO
0.67VODO
V
q
±2V
VOD
Change in Magnitude of Differential
RL = 50 (Figure 1)
q
0.2
V
Output Voltage
VOC
Common Mode Output Voltage
RL = 50 (Figure 1)
q
3V
VOC
Change in Magnitude of Common Mode
RL = 50 (Figure 1)
q
0.2
V
Output Voltage
ISS
Short-Circuit Current
VOUT = GND
±150
mA
IOZ
Output Leakage Current
–0.25V
≤ VO ≤ 0.25V, Power Off or
q
±1
±100
A
No-Cable Mode or Driver Disabled
tr, tf
Rise or Fall Time
LTC2845C (Figures 2, 5)
q
215
25
ns
LTC2845I (Figures 2, 5)
q
215
35
ns
tPLH
Input to Output
LTC2845C (Figures 2, 5)
q
20
40
65
ns
LTC28451 (Figures 2, 5)
q
20
40
75
ns
tPHL
Input to Output
LTC2845C (Figures 2, 5)
q
20
40
65
ns
LTC2845I (Figures 2, 5)
q
20
40
75
ns
t
Input to Output Difference,
tPLH – tPHL
LTC2845C (Figures 2, 5)
q
03
12
ns
LTC2845I (Figures 2, 5)
q
03
17
ns
tSKEW
Output to Output Skew
(Figures 2, 5)
3
ns
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