LTC1334 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1334 Datasheet PDF : 16 Pages
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LTC1334
DC ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF (Notes 2, 3)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RS485 Receiver (SEL1 = SEL2 = High)
VTH
Differential Input Threshold Voltage
∆VTH
IIN
Input Hysteresis
Input Current (A, B)
RIN
Input Resistance
RS232 Receiver (SEL1 = SEL2 = Low)
– 7V ≤ VCM ≤ 12V, LTC1334C
–7V ≤ VCM ≤ 7V, LTC1334I
VCM = 0V
VIN = – 7V
VIN = 12V
– 7V ≤ VIN ≤ 12V
q – 0.2
q –0.3
0.2
V
0.3
V
70
mV
q
– 0.8
mA
q
1.0
mA
q 12
24
kΩ
VTH
Receiver Input Threshold Voltage
Input Low Threshold
Input High Threshold
q 0.8
q
V
2.4
V
∆VTH
Receiver Input Hysteresis
RIN
Receiver Input Resistance
Receiver Output
VIN = ±10V
0.6
V
3
5
7
kΩ
VOH
Receiver Output High Voltage
IO = – 3mA, VIN = 0V, SEL1 = SEL2 = Low q 3.5
4.6
V
VOL
Receiver Output Low Voltage
IO = 3mA, VIN = 3V, SEL1 = SEL2 = Low q
0.2
0.4
V
IOSR
Short-Circuit Current
0V ≤ VO ≤ VCC
q7
85
mA
IOZR
Three-State Output Current
ON/OFF = Low
q
± 10
µA
ROB
Inactive “B” Output Pull-Up Resistance (Note 5) ON/OFF = High, SEL1 = SEL2 = High
50
kΩ
Power Supply Generator
VDD
VDD Output Voltage
VEE
VEE Output Voltage
Power Supply
No Load, ON/OFF = High
IDD = – 10mA, ON/OFF = High
No Load, ON/OFF = High
IEE = 10mA, ON/OFF = High
8.5
V
7.6
V
– 7.7
V
– 6.9
V
ICC
VCC Supply Current
No Load, SEL1 = SEL2 = High
q
No Load Shutdown, ON/OFF = 0V
q
8
25
mA
10
100
µA
AC ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF (Notes 2, 3)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RS232 Mode (SEL1 = SEL2 = Low)
SR
Slew Rate
tT
Transition Time
tPLH
Driver Input to Output
tPHL
Driver Input to Output
tPLH
Receiver Input to Output
tPHL
Receiver Input to Output
RS485 Mode (SEL1 = SEL2 = High)
Figure 4, RL = 3k, CL = 15pF
Figure 4, RL = 3k, CL = 1000pF
Figure 4, RL = 3k, CL = 2500pF
Figures 4, 9, RL = 3k, CL = 15pF
Figures 4, 9, RL = 3k, CL = 15pF
Figures 5, 10
Figures 5, 10
q
q4
30
V/µs
V/µs
q 0.22
1.9
3.1
µs
q
0.6
4
µs
q
0.6
4
µs
q
0.3
6
µs
q
0.4
6
µs
t PLH
t PHL
tSKEW
tr, tf
Driver Input to Output
Driver Input to Output
Driver Output to Output
Driver Rise and Fall Time
Figures 2, 6, RL = 54Ω, CL = 100pF
q 20
40
70
ns
Figures 2, 6, RL = 54Ω, CL = 100pF
q 20
40
70
ns
Figures 2, 6, RL = 54Ω, CL = 100pF
q
5
15
ns
Figures 2, 6, RL = 54Ω, CL = 100pF
q3
15
40
ns
3
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