3
LTC2844
sn2844 2844fs
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
PD
Internal Power Dissipation (DCE Mode,
RS530, RS530-A, X.21 Modes, Full Load
210
mW
All Digital Pins = GND or VIN)
V.28 Mode, Full Load
54
mW
Logic Inputs and Outputs
VIH
Logic Input High Voltage
q
2V
VIL
Logic Input Low Voltage
q
0.8
V
IIN
Logic Input Current
D1, D2, D3, D4
q
±10
A
M0, M1, M2, DCE = GND
q
– 30
– 75
–120
A
M0, M1, M2, DCE = 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 = 0V
q
– 30
– 85
– 160
A
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
LTC2844C (Figures 2, 5)
q
215
25
ns
LTC2844I (Figures 2, 5)
q
215
35
ns
tPLH
Input to Output
LTC2844C (Figures 2, 5)
q
20
40
65
ns
LTC28441 (Figures 2, 5)
q
20
40
75
ns
tPHL
Input to Output
LTC2844C (Figures 2, 5)
q
20
40
65
ns
LTC2844I (Figures 2, 5)
q
20
40
75
ns
t
Input to Output Difference,
tPLH – tPHL
LTC2844C (Figures 2, 5)
q
03
12
ns
LTC2844I (Figures 2, 5)
q
03
17
ns
tSKEW
Output to Output Skew
(Figures 2, 5)
3
ns
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
IIN
Input Current (A, B)
–10V
≤ VA,B ≤ 10V
q
±0.66
mA
RIN
Input Impedance
–10V
≤ VA,B ≤ 10V
q
15
30
k
tr, tf
Rise or Fall Time
(Figures 2, 6)
15
ns
tPLH
Input to Output
LTC2844C CL = 50pF (Figures 2, 6)
q
50
80
ns
LTC2844I CL = 50pF (Figures 2, 6)
q
50
90
ns