Datasheet
LTM2882
4
2882fe
For more information www.linear.com/LTM2882
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2882-3 V
CC
= 3.3V, LTM2882-5 V
CC
= 5.0V, V
L
= V
CC
, and GND =
GND2 = 0V, ON = V
L
unless otherwise noted.
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Receiver
V
IR
Receiver Input Threshold Input Low
l
0.8 1.3 V
Input High
l
1.7 2.5 V
V
HYSR
Receiver Input Hysteresis
l
0.1 0.4 1.0 V
R
IN
Receiver Input Resistance –15V ≤ (V
R1IN
, V
R2IN
) ≤ 15V
l
3 5 7 kΩ
Logic
V
ITH
Logic Input Threshold Voltage ON, T1IN, T2IN, DIN = 1.62V ≤ V
L
< 2.35V
l
0.25•V
L
0.75•V
L
V
ON, T1IN, T2IN, DIN = 2.35V ≤ V
L
≤ 5.5V
l
0.4 0.67•V
L
V
DE
l
0.4 0.67•V
CC2
V
I
INL
Logic Input Current
l
±1 µA
V
HYS
Logic Input Hysteresis T1IN, T2IN, DIN (Note 2) 150 mV
V
OH
Logic Output High Voltage R1OUT, R2OUT
I
LOAD
= –1mA (Sourcing), 1.62V ≤ V
L
< 3.0V
I
LOAD
= –4mA (Sourcing), 3.0V ≤ V
L
≤ 5.5V
l
l
V
L
– 0.4
V
L
– 0.4
V
V
DOUT, I
LOAD
= –4mA (Sourcing)
l
V
CC2
– 0.4 V
V
OL
Logic Output Low Voltage R1OUT, R2OUT
I
LOAD
= 1mA (Sinking), 1.62V ≤ V
L
< 3.0V
I
LOAD
= 4mA (Sinking), 3.0V ≤ V
L
≤ 5.5V
l
l
0.4
0.4
V
V
DOUT, I
LOAD
= 4mA (Sinking)
l
0.4 V
ESD (HBM) (Note 2)
RS232 Driver and Receiver Protection (T1OUT, T2OUT, R1IN, R2IN) to (V
CC2
, GND2) ±10 kV
(T1OUT, T2OUT, R1IN, R2IN) to (V
CC
, V
L
, GND) ±10 kV
Isolation Boundary (V
CC2
, GND2) to (V
CC
, V
L
, GND) ±10 kV
swiTching characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2882-3 V
CC
= 3.3V, LTM2882-5 V
CC
= 5.0V, V
L
= V
CC
, and GND =
GND2 = 0V, ON = V
L
unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Data Rate
(T1IN to T1OUT, T2IN to T2OUT)
R
L
= 3kΩ, C
L
= 2.5nF (Note 3)
l
100 kbps
R
L
= 3kΩ, C
L
= 1nF (Note 3)
l
250 kbps
R
L
= 3kΩ, C
L
= 250pF (Note 3)
l
1000 kbps
Maximum Data Rate (DIN to DOUT) C
L
= 15pF (Note 3)
l
10 Mbps
Driver
Driver Slew Rate (6V/t
THL
or t
TLH
) R
L
= 3kΩ, C
L
= 50pF (Figure 1)
l
150 V/µs
t
PHLD
, t
PLHD
Driver Propagation Delay R
L
= 3kΩ, C
L
= 50pF (Figure 1)
l
0.2 0.5 µs
t
SKEWD
Driver Skew |t
PHLD
– t
PLHD
| R
L
= 3kΩ, C
L
= 50pF (Figure 1) 40 ns
t
PZHD
, t
PZLD
Driver Output Enable Time DE = ↑ , R
L
= 3kΩ, C
L
= 50pF (Figure 2)
l
0.6 2 µs
t
PHZD
, t
PLZD
Driver Output Disable Time DE = ↓ , R
L
= 3kΩ, C
L
= 50pF (Figure 2)
l
0.3 2 µs