LTC1685CS8#PBF Linear Technology, LTC1685CS8#PBF Datasheet - Page 5

• Manufacturer Part Number: LTC1685CS8#PBF
• Description: IC TXRX RS485 PREC DELAY 8-SOIC
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LTC1685CS8#PBF

• Number Of Drivers/receivers: 1/1
• Protocol: RS422, RS485
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TYPICAL PERFORMANCE CHARACTERISTICS
PIN
RO (Pin 1): Receiver Output. If A B by 300mV, then RO
will be high. If A B by 300mV, then RO will be low.
RE (Pin 2): Receiver Enable. RE = Low enables the
receiver. RE = High forces receiver output into high
impedance state. Do not float.
DE (Pin 3): Driver Enable. DE = High enables the driver.
DE = Low will force the driver output into a high impedance
state and the device will function as a line receiver if RE is
also low. Do not float.
25
20
15
10
U
0
5
–50 –25
Receiver Propagation Delay
vs Temperature
FUNCTIONS
U
0
TEMPERATURE ( C)
25
25
20
15
10
5
0
2.5
Driver Propagation Delay
vs Driver Input Voltage
U
50
V
INPUT THRESHOLD = 1.5V
T
DD
A
= 25 C
= 5V
75
3.0
DRIVER INPUT VOLTAGE (V)
W
100
1680 G09
3.5
U
125
t
t
HL
LH
4.0
70
60
50
40
30
20
10
0
4.5
0.3
Receiver Maximum Data Rate
vs Input Overdrive
T
A
1685 G08
0.4
= 25 C
RECEIVER INPUT DIFFERENTIAL (V)
5.0
0.5
0.6
DI (Pin 4): Driver Input. Controls the states of the A and
B outputs only if DE = High. If DE = Low, DI will have no
effect on A and B pins. Do not float.
GND (Pin 5): Ground.
A (Pin 6): Noninverting Receiver Input/Driver Output.
B (Pin 7): Inverting Receiver Input/Driver Output.
V
0.1 F ceramic capacitor.
0.7
DD
1.0
(Pin 8): Positive Supply, 5V to 5%. Bypass with
19.0
18.5
16.5
16.0
18.0
17.5
17.0
1.5
1685 G10
5
Driver Propagation Delay
vs Capacitive Load
T
A
2.5
= 25 C
15
LOAD CAPACITANCE (pF)
25
25
20
15
10
5
0
– 40
Driver Propagation Delay
vs Temperature
50
– 20
75
0
TEMPERATURE ( C)
100
20
1685 G11
150
40
LTC1685
60
80
1685 G07
5
100