LTC487_05 Datasheet, PDF (2/8 Pages) Linear Technology – Quad Low Power RS485 Driver

LTC487
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage (V_CC) ............................................... 12V
Control Input Voltages .................... – 0.5V to V_CC + 0.5V
Driver Input Voltages ...................... – 0.5V to V_CC + 0.5V
Driver Output Voltages .......................................... ±14V
Control Input Currents ........................................ ±25mA
Driver Input Currents .......................................... ±25mA
Operating Temperature Range
Commercial ............................................ 0°C to 70°C
Industrial ........................................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
PACKAGE/ORDER I FOR ATIO
DI1 1
DO1A 2
DO1B 3
EN12 4
DO2B 5
DO2A 6
DI2 7
GND 8
TOP VIEW
16 V_CC
15 DI4
14 DO4A
13 DO4B
12 EN34
11 DO3B
10 DO3A
9 DI3
N PACKAGE
S PACKAGE
16-LEAD PLASTIC DIP 16-LEAD PLASTIC SOL
T_JMAX = 125°C, θ_JA = 70°C/W (N)
T_JMAX = 150°C, θ_JA = 95°C/W (S)
Consult factory for Military grade parts.
ORDER PART
NUMBER
LTC487CN
LTC487CSW
LTC487IN
LTC487ISW
DC ELECTRICAL CHARACTERISTICS
V_CC = 5V ± 5%, 0°C ≤ T_A ≤ 70°C (Commercial), – 40°C ≤ T_A ≤ 85°C (Industrial) (Note 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
V_OD1
Differential Driver Output Voltage (Unloaded)
I_O = 0
V_OD2
Differential Driver Output Voltage (With Load)
R = 50Ω; (RS422)
2
R = 27Ω; (RS485) (Figure 3) 1.5
V_OD
Change in Magnitude of Driver Differential
R = 27Ω or R = 50Ω
Output Voltage for Complementary Output States (Figure 3)
V_OC
⏐V_OC⏐
Driver Common-Mode Output Voltage
Change in Magnitude of Driver Common-Mode
Output Voltage for Complementary Output States
V_IH
Input High Voltage
V_IL
Input Low Voltage
I_IN1
Input Current
I_CC
Supply Current
DI, EN12, EN34
2.0
No Load Output Enabled
110
Output Disabled
110
I_OSD1
Driver Short-Circuit Current, V_OUT = High
V_O = – 7V
100
I_OSD2
Driver Short-Circuit Current, V_OUT = Low
V_O = 12V
100
I_OZ
High Impedance State Output Current
V_O = – 7V to 12V
±10
SWITCHI G CHARACTERISTICS V_CC = 5V ±5%, 0°C ≤ T_A ≤ 70°C (Note 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
t_PLH
t_PHL
t_SKEW
t_r, t_f
t_ZH
t_ZL
t_LZ
t_HZ
Driver Input to Output
Driver Input to Output
Driver Output to Output
Driver Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
R_DIFF = 54Ω, C_L1 = C_L2 = 100pF
(Figures 1, 4)
10
30
10
30
5
5
20
C_L = 100pF (Figures 2, 5) S2 Closed
35
C_L = 100pF (Figures 2, 5) S1 Closed
35
C_L = 15pF (Figures 2, 5) S1 Closed
35
C_L = 15pF (Figures 2, 5) S2 Closed
35
MAX
5
5
0.2
3
0.2
V
0.8
±2
200
200
250
250
± 200
UNITS
V
V
V
V
V
V
V
µA
µA
µA
mA
mA
µA
MAX
UNITS
50
ns
50
ns
15
ns
25
ns
70
ns
70
ns
70
ns
70
ns
Note 1: Absolute maximum ratings are those beyond which the safety of
the device cannot be guaranteed.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device GND unless
otherwise specified.
Note 3: All typicals are given for V_CC = 5V and Temperature = 25°C.
2