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

LTC2846IG#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
1
LTC2846
sn2846 2846fs
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
TYPICAL APPLICATIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
Complete DTE or DCE Multiprotocol Serial Interface with DB-25 Connector
■
Data Networking
■
CSU and DSU
■
Data Routers
■
Software-Selectable Transceiver Supports:
RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21
■
Operates from Single 3.3V Supply
■
TUV Rheinland of North America Inc. Certified NET1,
NET2 and TBR2 Compliant, Report No.:
TBR2/050101/02, TBR2/051501/02
■
1.2MHz Boost Switching Regulator for 3.3V to 5V
Conversion
■
On-Chip Cable Termination
■
Complete DTE or DCE Port with LTC2844 or LTC2845
■
Small Footprint
■
Available in 36-Lead SSOP (0.209 Wide) Package
The LTC
®
2846 is a 3-driver/3-receiver multiprotocol trans-
ceiver with on-chip cable termination. When combined with
the LTC2844 or LTC2845, this chip set forms a complete
software-selectable DTE or DCE interface port that supports
the RS232, RS449, EIA530, EIA530-A, V.35, V.36 and X.21
protocols. All necessary cable termination is provided inside
the LTC2846. The LTC2846 has a boost regulator that takes
in a 3.3V input and switches at 1.2MHz, allowing the use of
tiny, low cost capacitors and inductors 2mm or less in height.
The 5V output drives an internal charge pump that requires
only five space-saving surface mounted capacitors. The
LTC2846 is available in a 36-lead SSOP surface mount
package.
3.3V Software-Selectable
Multiprotocol Transceiver
with Termination
D2 D1
LTC2844
RTS
DTRDSR DCDCTS
D3
R2 R1R4
R3
LTC2846
LL
TXDSCTETXC
RXCRXD
21424111512179314192062322513 81018 7 16
2846 TA01
D1
SCTE B
SCTE A (113)
TXD B
TXD A (103)
RXC A (115)
RXC B
RXD A (104)
RXD B
RTS A (105)
RTS B
DTR A (108)
DTR B
CTS A (106)
CTS B
LL A (141)
SG (102)
SHIELD (101)
DB-25 CONNECTOR
TXC A (114)
DCD A (109)
DCD B
DSR A (107)
DSR B
D4
D2D3
R1R2R3
TXC B
TTTTT
2
LTC2846
sn2846 2846fs
ORDER PART
NUMBER
(Note 1)
V
CC
Voltage.............................................. –0.3V to 6.5V
V
IN
Voltage .............................................. –0.3V to 6.5V
Input Voltage
Transmitters ........................... –0.3V to (V
CC
+ 0.3V)
Receivers............................................... –18V to 18V
Logic Pins .............................. –0.3V to (V
CC
+ 0.3V)
Output Voltage
Transmitters ................. (V
EE
– 0.3V) to (V
DD
+ 0.3V)
Receivers................................. –0.3V to (V
IN
+ 0.3V)
V
EE
........................................................ –10V to 0.3V
V
DD
....................................................... –0.3V to 10V
Short-Circuit Duration
Transmitter Output ..................................... Indefinite
Receiver Output.......................................... Indefinite
V
EE
.................................................................. 30 sec
SW Voltage ............................................... –0.4V to 36V
FB Voltage ............................................... –0.3V to 2.5V
Current into FB Pin .............................................. ±1mA
SHDN Voltage ........................................... –0.3V to 10V
Operating Temperature Range
LTC2846C ............................................... 0°C to 70°C
LTC2846I........................................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
LTC2846CG
LTC2846IG
T
JMAX
= 125°C, θ
JA
= 90°C/W, θ
JC
= 35°C/W
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TOP VIEW
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
NC
PGND
V
IN
SHDN
C1
–
C1
+
V
DD
V
CC
D1
D2
D3
R1
R2
R3
M0
M1
V
IN
M2
SW
FB
SGND
C2
+
C2
–
V
EE
GND
D1 A
D1 B
D2 A
D2 B
D3/R1 A
D3/R1 B
R2 A
R2 B
R3 A
R3 B
DCE/DTE
R3
CHARGE PUMP
R1
D2
D1
R2
D3
G PACKAGE
36-LEAD PLASTIC SSOP
T
T
T
T
T
BOOST
SWITCHING
REGULATOR
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
IN
= 3.3V, V
SHDN
= V
IN
, unless otherwise noted. (Notes 2, 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
I
CC
V
CC
Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load 14 mA
All Digital Pins = GND or V
IN
) RS530, RS530-A, X.21 Modes, Full Load ● 100 130 mA
V.35 Mode
● 126 170 mA
V.28 Mode, No Load 20 mA
V.28 Mode, Full Load ● 35 75 mA
No-Cable Mode
● 300 900 µA
P
D
Internal Power Dissipation (DCE Mode) RS530, RS530-A, X.21 Modes, Full Load 550 mW
V.35 Mode, Full Load 775 mW
V.28 Mode, Full Load 200 mW
V
+
Positive Charge Pump Output Voltage V.11 or V.28 Mode, No Load ● 8 9.3 V
V.35 Mode
● 7 8.0 V
V.28 Mode, with Load
● 8 8.7 V
V.28 Mode, with Load, I
DD
= 10mA 6.5 V
ELECTRICAL CHARACTERISTICS
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*θ
JA
SOLDERED TO A CIRCUIT BOARD IS TYPICALLY 60°C/W
3
LTC2846
sn2846 2846fs
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
IN
= 3.3V, V
SHDN
= V
IN
, unless otherwise noted. (Notes 2, 3)
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
–
Negative Charge Pump Output Voltage V.28 Mode, No Load –9.6 V
V.28 Mode, Full Load
● –7.5 –8.5 V
V.35 Mode
● –5.5 –6.5 V
RS530, RS530-A, X.21 Modes, Full Load
● –4.5 –6.0 V
f
OSC
Charge Pump Oscillator Frequency 500 kHz
t
r
Charge Pump Rise Time No-Cable Mode/Power-Off to Normal Operation 2 ms
Logic Inputs and Outputs
V
IH
Logic Input High Voltage D1, D2, D3, M0, M1, M2, DCE/DTE ● 2.0 V
SHDN 2.4 V
V
IL
Logic Input Low Voltage D1, D2, D3, M0, M1, M2, DCE/DTE ● 0.8 V
SHDN 0.5 V
I
IN
Logic Input Current D1, D2, D3 ● ±10 µA
M0, M1, M2, DCE/DTE = GND
● –30 –75 –120 µA
M0, M1, M2, DCE/DTE = V
IN
● ±10 µA
SHDN = GND ±0.1 µA
SHDN = 3V 16 32 µA
V
OH
Output High Voltage I
O
= –3mA ● 2.7 3 V
V
OL
Output Low Voltage I
O
= 1.6mA ● 0.2 0.4 V
I
OSR
Output Short-Circuit Current 0V ≤ V
O
≤ V
IN
● ±50 mA
I
OZR
Three-State Output Current M0 = M1 = M2 = V
IN
, V
O
= GND ● –30 –85 –160 µA
M0 = M1 = M2 = V
IN
, V
O
= V
IN
● ±10 µA
V.11 Driver
V
ODO
Open Circuit Differential Output Voltage R
L
= 1.95k (Figure 1) ● ±5V
V
ODL
Loaded Differential Output Voltage R
L
= 50Ω (Figure 1) 0.5V
ODO
0.67V
ODO
V
R
L
= 50Ω (Figure 1) ● ±2V
∆V
OD
Change in Magnitude of Differential R
L
= 50Ω (Figure 1) ● 0.2 V
Output Voltage
V
OC
Common Mode Output Voltage R
L
= 50Ω (Figure 1) ● 3V
∆V
OC
Change in Magnitude of Common Mode R
L
= 50Ω (Figure 1) ● 0.2 V
Output Voltage
I
SS
Short-Circuit Current V
OUT
= GND ±150 mA
I
OZ
Output Leakage Current V
A
and V
B
≤ 0.25V, Power Off or ● ±1 ±100 µA
No-Cable Mode or Driver Disabled
t
r
, t
f
Rise or Fall Time (Figures 2, 13) ● 21525 ns
t
PLH
Input to Output Rising (Figures 2, 13) ● 15 40 65 ns
t
PHL
Input to Output Falling (Figures 2, 13) ● 15 40 65 ns
∆t Input to Output Difference, t
PLH
– t
PHL
(Figures 2, 13) ● 0312 ns
t
SKEW
Output to Output Skew (Figures 2, 13) 3 ns
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LTC2846IG#TRPBF

Mfr. #:
Buy LTC2846IG#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
RS-232 Interface IC 3.3V Multiprotocol CLK_DATA 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