LTC1327 Linear Technology, LTC1327 Datasheet

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LTC1327

Manufacturer Part Number
LTC1327
Description
3.3V Micropower EIA/TIA-562 Transceiver
Manufacturer
Linear Technology
Datasheet

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FEATURE
A
TYPICAL
0.1 F
C1
PPLICATI
Low Supply Current
0.2 A Supply Current in SHUTDOWN
ESD Protection
Operates From a Single 3.3V Supply
Uses Small Capacitors
Operates To 120k Baud
Three-State Outputs are High Impedance When Off
Output Overvoltage Does Not Force Current Back
Into Supplies
EIA/TIA-562 I/O Lines Can Be Forced to 25V
Without Damage
Flowthrough Architecture
Notebook Computers
Palmtop Computers
0.1 F
C2
DR1 OUT
DR2 OUT
DR4 OUT
3-Drivers/5-Receivers with SHUTDOWN
ON/OFF
RX1 IN
RX2 IN
RX3 IN
RX4 IN
RX5 IN
V
V
S
A
+
CC
O
PPLICATI
10
11
12
13
14
1
2
3
4
5
6
7
8
9
U
S
LTC1327
O
U
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DR1 IN
RX1 OUT
DR2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DR3 IN
RX5 OUT
V
GND
C3
0.1 F
300 A
0.1 F
1327 TA01
10kV
C4
0.1 F
The LTC1327 is an advanced low power, three-driver/five-
receiver EIA/TIA-562 transceiver. In the no load condition,
the supply current is only 300 A. The charge pump only
requires four 0.1 F capacitors.
In SHUTDOWN mode, the supply current is further re-
duced to 0.2 A. All EIA/TIA-562 outputs assume a high
impedance state in SHUTDOWN and with the power off.
The LTC1327 is fully compliant with all data rate and
overvoltage EIA/TIA-562 specifications. The transceiver
can operate up to 120k Baud with a 1000pF//3k load.
Both driver outputs and receiver inputs can be forced to
ESD strikes.
D
25V without damage, and can survive multiple 10kV
ESCRIPTIO
3.3V Micropower EIA/TIA-562
600
500
100
400
300
200
0
V
ALL DRIVERS INPUTS TIED TO V
–20
Supply Current vs Temperature
CC
= 3.3V
U
0
QUIESCENT
TEMPERATURE (°C)
CURRENT
20
SHUTDOWN
CURRENT
40
60
CC
Transceiver
LTC1327 • TA02
80
LTC1327
1.2
1.0
0.8
0.6
0.4
0.2
1

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LTC1327 Summary of contents

Page 1

... In SHUTDOWN mode, the supply current is further re- duced to 0.2 A. All EIA/TIA-562 outputs assume a high impedance state in SHUTDOWN and with the power off. The LTC1327 is fully compliant with all data rate and overvoltage EIA/TIA-562 specifications. The transceiver can operate up to 120k Baud with a 1000pF//3k load. ...

Page 2

... Driver .................................................... –25V to 25V Receiver ................................. –0. Short-Circuit Duration + ................................................................................... V – ................................................................................... V Driver Output ............................................. Indefinite Receiver Output ......................................... Indefinite Operating Temperature Range Commercial LTC1327C .......................... Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec)................. 300 C ELECTRICAL C HARA TERISTICS D C PARAMETER Any Driver Output Voltage Swing ...

Page 3

... Note 3: Supply current measurement in SHUTDOWN mode is performed with V ON/OFF CE C HARA TERISTICS C Receiver Input Thresholds vs Temperature 2.2 2.0 1 1.6 – 1.4 1.2 1 TEMPERATURE (°C) LTC1327 MIN TYP MAX 5.7 5.5 – 5.3 – 5.0 0.2 0.3 0.5 0.2 10 1.4 0 3.5 2 3.5 0.3 0.8 0.2 0.8 = 0V. Supply Current vs Data Rate ...

Page 4

... LTC1327 W U TYPICAL PERFOR A V Supply Current vs Data Rate 3. 1000pF DRIVERS ACTIVE 100 120 140 DATA RATE (k BAUD) 1327 G03 Receiver Short-Circuit Current vs Temperature – ...

Page 5

... DR2 IN 22 RX2 OUT 21 RX3 OUT 20 RX4 OUT 19 DR3 IN 18 RX5 OUT 17 GND 16 15 LT1327 • TC01 LTC1327 = 0V. The driver outputs are protected CC Driver Timing Test Load DRIVER OUTPUT DRIVER DR INPUT 51pF 3k 1327 TC02 Receiver Timing Test Load RX OUTPUT 51pF ...

Page 6

... SWITCHI WAVEFOR S DR INPUT DR OUTPUT RX INPUT RX OUTPUT PPLICATI FOR ATIO The LTC1327 is compatible with RS232 parts. This table shows some devices and the receiver input thresholds. MANUFACTURER PART NUMBER Linear Technology LT1080 LT1137A LT1330 LT1281 All Others Texas Instruments SN75189 ...

Page 7

... S Package 28-Lead Plastic SOL 0.037 – 0.045 (0.940 – 1.143) 0.050 0.014 – 0.019 0.004 – 0.012 (1.270) (0.356 – 0.482) (0.102 – 0.305) TYP LTC1327 0.397 – 0.407* (10.07 – 10.33 0.301 – 0.311 0.045 (7.65 – ...

Page 8

... LTC1327 NORTHEAST REGION Linear Technology Corporation One Oxford Valley 2300 E. Lincoln Hwy.,Suite 306 Langhorne, PA 19047 Phone: (215) 757-8578 FAX: (215) 757-5631 Linear Technology Corporation 266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 FRANCE Linear Technology S.A.R.L. Immeuble "Le Quartz" ...

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