OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LTC2845IUHF#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
4
LTC2845
sn2845 2845fs
The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
IN
= 3.3V, V
DD
= 8V, V
EE
= – 7V for V.28, – 5.5V for V.10, V.11
(Notes 2, 3)
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V.11 Receiver
V
TH
Input Threshold Voltage –7V ≤ V
CM
≤ 7V ● –0.2 0.2 V
∆V
TH
Input Hysteresis –7V ≤ V
CM
≤ 7V ● 15 40 mV
I
IN
Input Current (A, B) –10V ≤ V
A,B
≤ 10V ● ±0.66 mA
R
IN
Input Impedance –10V ≤ V
A,B
≤ 10V ● 15 30 kΩ
t
r
, t
f
Rise or Fall Time (Figures 2, 6) 15 ns
t
PLH
Input to Output LTC2845C C
L
= 50pF (Figures 2, 6) ● 50 80 ns
LTC2845I C
L
= 50pF (Figures 2, 6) ● 50 90 ns
t
PHL
Input to Output LTC2845C C
L
= 50pF (Figures 2, 6) ● 50 80 ns
LTC2845I C
L
= 50pF (Figures 2, 6) ● 50 90 ns
∆t Input to Output Difference, t
PLH
– t
PHL
LTC2845C C
L
= 50pF (Figures 2, 6) ● 0416ns
LTC2845I C
L
= 50pF (Figures 2, 6) ● 0421ns
V.10 Driver
V
O
Output Voltage Open Circuit, R
L
= 3.9k ● ±4 ±6V
V
T
Output Voltage R
L
= 450Ω (Figure 3) ● ±3.6 V
R
L
= 450Ω (Figure 3) 0.9V
O
I
SS
Short-Circuit Current V
O
= GND ±150 mA
I
OZ
Output Leakage Current –0.25V ≤ V
O
≤ 0.25V, Power Off or ● ±0.1 ±100 µA
No-Cable Mode or Driver Disabled
t
r
, t
f
Rise or Fall Time R
L
= 450Ω, C
L
= 100pF (Figures 3, 7) 2 µs
t
PLH
Input to Output R
L
= 450Ω, C
L
= 100pF (Figures 3, 7) 1 µs
t
PHL
Input to Output R
L
= 450Ω, C
L
= 100pF (Figures 3, 7) 1 µs
V.10 Receiver
V
TH
Receiver Input Threshold Voltage ● –0.25 0.25 V
∆V
TH
Receiver Input Hysteresis ● 25 50 mV
I
IN
Receiver Input Current –10V ≤ V
A
≤ 10V ● ±0.66 mA
R
IN
Receiver Input Impedance –10V ≤ V
A
≤ 10V ● 15 30 kΩ
t
r
, t
f
Rise or Fall Time C
L
= 50pF (Figures 4, 8) 15 ns
t
PLH
Input to Output C
L
= 50pF (Figures 4, 8) 55 ns
t
PHL
Input to Output C
L
= 50pF (Figures 4, 8) 109 ns
∆t Input to Output Difference, t
PLH
– t
PHL
C
L
= 50pF (Figures 4, 8) 60 ns
V.28 Driver
V
O
Output Voltage Open Circuit ● ±10 V
R
L
= 3k (Figure 3) ● ±5 ±8.5 V
I
SS
Short-Circuit Current V
O
= GND ● ±150 mA
I
OZ
Output Leakage Current –0.25V ≤ V
O
≤ 0.25V, Power Off or ● ±1 ±100 µA
No-Cable Mode or Driver Disabled
SR Slew Rate R
L
= 3k, C
L
= 2500pF (Figures 3, 7) ● 430V/µs
t
PLH
Input to Output R
L
= 3k, C
L
= 2500pF (Figures 3, 7) ● 1.3 2.5 µs
t
PHL
Input to Output R
L
= 3k, C
L
= 2500pF (Figures 3, 7) ● 1.3 2.5 µs
5
LTC2845
sn2845 2845fs
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
UW
DATA RATE (kBd)
I
CC
(mA)
140
135
130
125
120
115
110
105
2845 G01
10 100 1000 10000
DATA RATE (kBd)
10
I
EE
(mA)
34
34
30
28
26
24
22
20
18
30 100
2845 G02
20 40 50 60 70 80
10 30 10020 40 50 60 70 80
DATA RATE (kBd)
I
DD
(mA)
16
15
14
13
12
11
10
9
8
7
2845 G03
TEMPERATURE (°C)
–40
I
CC
(mA)
125
120
115
110
105
100
95
20 60
2845 G04
–20 0 40 80 100 –40 20 60–20 0 40 80 100 –40 20 60–20 0 40 80 100
TEMPERATURE (°C)
I
EE
(mA)
2845 G05
34.6
34.4
34.2
34.0
33.8
33.6
33.4
33.2
33.0
TEMPERATURE (°C)
I
DD
(mA)
2845 G06
13.9
13.8
13.7
13.6
13.5
13.4
13.3
13.2
13.1
T
A
= 25°C T
A
= 25°C
T
A
= 25°C
RS530, X.21 in DCE Mode
(Three V.11, Two V.10 Drivers
with Full Load) I
CC
vs Data Rate
V.28 in DCE Mode
(Five V.28 Drivers with Full Load)
I
DD
vs Data Rate
RS530-A in DCE Mode
(Three V.10 Drivers with Full
Load) I
EE
vs Data Rate
RS530, X.21 in DCE Mode
(Three V.11, Two V.10 Drivers with
Full Load) I
CC
vs Temperature
V.28 in DCE Mode
(Five V.28 Drivers with Full Load)
I
DD
vs Temperature
RS530-A in DCE Mode
(Three V.10 Drivers with Full
Load) I
EE
vs Temperature
The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
IN
= 3.3V, V
DD
= 8V, V
EE
= – 7V for V.28, – 5.5V for V.10, V.11
(Notes 2, 3)
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
are negative. All voltages are referenced to device ground unless otherwise
specified.
Note 3: All typicals are given for V
CC
= 5V, V
IN
= 3.3V, V
DD
= 8V, V
EE
= –7V
for V.28, –5.5V for V.10, V.11 and T
A
= 25°C.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V.28 Receiver
V
THL
Input Low Threshold Voltage ● 0.8 V
V
TLH
Input High Threshold Voltage ● 2V
∆V
TH
Receiver Input Hysterisis ● 0.1 0.3 V
R
IN
Receiver Input Impedance –15V ≤ V
A
≤ 15V ● 357 kΩ
t
r
, t
f
Rise or Fall Time C
L
= 50pF (Figures 4, 8) 15 ns
t
PLH
Input to Output C
L
= 50pF (Figures 4, 8) ● 60 100 ns
t
PHL
Input to Output C
L
= 50pF (Figures 4, 8) ● 150 500 ns
6
LTC2845
sn2845 2845fs
V
CC
(Pins 1, 19/Pins 17, 36): Positive Supply for the
Transceivers. Connect to V
CC
Pin 8 on LTC2846 or to 5V
supply. Connect a 1µF capacitor to ground.
V
DD
(Pin 2/Pin 37): Positive Supply Voltage for V.28.
Connect to V
DD
Pin 7 on LTC2846 or 8V supply. Connect
a 1µF capacitor to ground.
D1 (Pin 3/Pin 38): TTL Level Driver 1 Input.
D2 (Pin 4/Pin 1): TTL Level Driver 2 Input.
D3 (Pin 5/Pin 2): TTL Level Driver 3 Input.
R1 (Pin 6/Pin 3): CMOS Level Receiver 1 Output. Receiver
outputs have a weak pull up to V
IN
when high impedance.
R2 (Pin 7/Pin 4): CMOS Level Receiver 2 Output.
R3 (Pin 8/Pin 5): CMOS Level Receiver 3 Output.
D4 (Pin 9/Pin 6): TTL Level Driver 4 Input.
R4 (Pin 10/Pin 7): CMOS Level Receiver 4 Output.
M0 (Pin 11/Pin 8): TTL Level Mode Select Input 0. Mode
select inputs pull up to V
IN
.
M1 (Pin 12/Pin 9): TTL Level Mode Select Input 1.
M2 (Pin 13/Pin 10): TTL Level Mode Select Input 2.
DCE/DTE (Pin 14/Pin 12): TTL Level Mode Select Input.
Logic high enables Driver 3. Logic low enables Receiver 1.
D4ENB (Pin 15/Pin 13): TTL Level Enable Input. Logic low
enables Driver 4. Pulls up to V
IN
.
R4EN (Pin 16/Pin 14): TTL Level Enable Input. Logic high
enables Receiver 4. Pulls up to V
IN
.
R5 (Pin 17/Pin 15): CMOS Level Receiver 5 Output.
PIN FUNCTIONS
UUU
D5 (Pin 18/Pin 16): TTL Level Driver 5 Input.
V
IN
(Pin 20/Pin 18): Positive Supply for the Receiver
Outputs. 3V ≤ V
IN
≤ 3.6V. Connect a 1µF capacitor to
ground.
D5 A (Pin 21/Pin 19): Driver 5 Inverting Output.
R5 A (Pin 22/Pin 20): Receiver 5 Inverting Input.
R4 A (Pin 23/Pin 21): Receiver 4 Inverting Input.
D4 A (Pin 24/Pin 22): Driver 4 Inverting Input.
R3 B (Pin 25/Pin 23): Receiver 3 Noninverting Input.
R3 A (Pin 26/Pin 24): Receiver 3 Inverting Input.
R2 B (Pin 27/Pin 25): Receiver 2 Noninverting Input.
R2 A (Pin 28/Pin 26): Receiver 2 Inverting Input.
D3/R1 B (Pin 29/Pin 27): Receiver 1 Noninverting Input
and Driver 3 Noninverting Output.
D3/R1 A (Pin 30/Pin 28): Receiver 1 Inverting Input and
Driver 3 Inverting Output.
D2 B (Pin 31/Pin 29): Driver 2 Noninverting Output.
D2 A (Pin 32/Pin 30): Driver 2 Inverting Output.
D1 B (Pin 33/Pin 31): Driver 1 Noninverting Output.
D1 A (Pin 34/Pin 32): Driver 1 Inverting Output.
GND (Pin 35/Pin 33): Ground.
V
EE
(Pin 36/Pins 34, 35): Negative Supply Voltage. Con-
nect to V
EE
Pin␣ 31 on LTC2846 or to –7V supply. Connect
a 1µF capacitor to ground.
EXPOSED Pad V
EE
(Pin 39): Must be Soldered to PCB.
(G-36/QFN-38 Packages)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC2845IUHF#PBF

Mfr. #:
Buy LTC2845IUHF#PBF
Manufacturer:
Analog Devices Inc.
Description:
RS-232 Interface IC 3.3V Multiprotocol Control Xcvr
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet