4
LTC2847
sn2847 2847fs
The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, VIN = 3.3V, unless otherwise noted (Notes 2, 3)
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V.11 Receiver
VTH
Input Threshold Voltage
– 7V
≤ VCM ≤ 7V
q
– 0.2
0.2
V
VTH
Input Hysteresis
– 7V
≤ VCM ≤ 7V
q
15
40
mV
RIN
Input Impedance
–7V
≤ VCM ≤ 7V (Figure 3)
q
100
103
tr, tf
Rise or Fall Time
CL = 50pF (Figures 4, 14)
15
ns
tPLH
Input to Output Rising
CL = 50pF (Figures 4, 14)
q
50
90
ns
tPHL
Input to Output Falling
CL = 50pF (Figures 4, 14)
q
50
90
ns
t
Input to Output Difference,
tPLH – tPHL
CL = 50pF (Figures 4, 14)
q
04
25
ns
V.35 Driver
VOD
Differential Output Voltage
Open Circuit, RL = 1.95k (Figure 5)
q
±1.2
V
With Load, – 4V
≤ VCM ≤ 4V (Figure 6)
±0.44
±0.55
±0.66
V
VOA, VOB
Single-Ended Output Voltage
Open Circuit, RL = 1.95k (Figure 5)
q
±1.2
V
VOC
Transmitter Output Offset
RL = 50 (Figure 5)
q
±0.6
V
IOH
Transmitter Output High Current
VA, VB = 0V
q
–9
– 11
– 13
mA
IOL
Transmitter Output Low Current
VA, VB = 0V
q
911
13
mA
IOZ
Transmitter Output Leakage Current
VA and VB ≤ 0.25V
q
±1
±100
A
ROD
Transmitter Differential Mode Impedance
q
50
100
150
ROC
Transmitter Common Mode Impedance
– 2V
≤ VCM ≤ 2V (Figure 7)
135
150
165
tr, tf
Rise or Fall Time
(Figures 8, 13)
5
ns
tPLH
Input to Output
(Figures 8, 13)
q
15
35
65
ns
tPHL
Input to Output
(Figures 8, 13)
q
15
35
65
ns
t
Input to Output Difference,
tPLH – tPHL
(Figures 8, 13)
q
016
ns
tSKEW
Output to Output Skew
(Figures 8, 13)
4
ns
V.35 Receiver
VTH
Differential Receiver Input Threshold Voltage
– 2V
≤ VCM ≤ 2V (Figure 9)
q
– 0.2
0.2
V
VTH
Receiver Input Hysteresis
– 2V
≤ VCM ≤ 2V (Figure 9)
q
15
40
mV
RID
Receiver Differential Mode Impedance
– 2V
≤ VCM ≤ 2V
q
90
103
110
RIC
Receiver Common Mode Impedance
– 2V
≤ VCM ≤ 2V (Figure 10)
135
150
165
tr, tf
Rise or Fall Time
CL = 50pF (Figures 4, 14)
15
ns
tPLH
Input to Output
CL = 50pF (Figures 4, 14)
q
50
90
ns
tPHL
Input to Output
CL = 50pF (Figures 4, 14)
q
50
90
ns
t
Input to Output Difference,
tPLH – tPHL
CL = 50pF (Figures 4, 14)
q
04
25
ns
V.28 Driver
VO
Output Voltage
Open Circuit
q
±10
V
RL = 3k (Figure 11)
q
±5
±8.5
V
ISS
Short-Circuit Current
VOUT = GND
q
±150
mA
ROZ
Power-Off Resistance
– 2V < VO < 2V, Power Off
q
300
or No-Cable Mode
SR
Slew Rate
RL = 7k, CL = 0 (Figures 11, 15)
q
430
V/
s
tPLH
Input to Output
RL = 3k, CL = 2500pF (Figures 11, 15)
q
1.5
2.5
s
tPHL
Input to Output
RL = 3k, CL = 2500pF (Figures 11, 15)
q
1.5
2.5
s