Zywyn Corporation
ZT3070E-ZT3078E
DC Electrical Characteristics
Unless otherwise stated, VCC = +3.3V, TA = Tmin to Tmax, typical values apply at VCC = +3.3V and TA = 25°C.
Parameter
Condition
Min
Typ
Max
Units
TTL Logic Input
TTL Logic Output
RS-485 Input
RS-485 Output
Power Pin
DE, DI, RE
RO
A, B
High ZO/P when disabled
High ZO/P when disabled
Y, Z
V
CC, VGND
Temp –40°C to +85°C
VCC Voltage Range
Industrial Grade
–40
3.0
+25
3.3
+85
3.6
°C
V
Supply Current
I
CC, Tx and Rx active
DI=VCC/GND, DE=VCC, RE=GND, RS-485 I/P=Open
DI=VCC/GND, DE=VCC, RE=VCC, RS-485 I/P=Open
0.5
0.5
1.5
1.5
mA
mA
ICC, Tx active
ICC, Rx active
DI=VCC/GND, DE=GND, RE=GND, RS-485 I/P=Open
DI=VCC/GND, DE = GND, RE = VCC, RS-485 I/P=Open
0.5
0.05
1.5
10
mA
μA
ISD, Shutdown Current
TTL LOGIC Input
Input Threshold Low
Input Threshold High
VCC = +3.3V Supply, DE, DI, and RE
VCC = +3.3V Supply, DE, DI, and RE
1.4
1.4
0.8
0.4
V
V
2.0
TTL LOGIC Output
Output Voltage Low
Output Voltage High
IOUT = +1mA, Input Differential Voltage = 200mV
V
V
I
OUT = –1mA, Input Differential Voltage = 200mV
VCC-0.3
Output Leakage Current Receiver Outputs Disabled, VOUT = 0.4V to 2.4V
±0.05
±1
μA
mA
Short Circuit Current
Receiver Input
Input Current
VOUT = 0V to VCC
±95
DE = 0V, VCC = 0V to 3.6V, VIN = +12V
DE = 0V, VCC = 0V to 3.6V, VIN = –7V
1.0
–0.8
mA
mA
DIfferentialThreshold Voltage,VTH VCM = -7V to +12V, VCC=+3.3V, TA=25oC
–0.2
96
+0.2
V
Input Hysteresis
VCM = 0V
20
mV
kΩ
Input Resistance, RIN
Transmitter Output
VCM = -7V to +12V
DIfferential Output Voltage, VOD No Load
VCC
V
DIfferential Output Voltage, ΔVOD With RL = 50Ω, CL = 50pF. Refer to Figure 1. (RS422)
With RL = 27Ω. CL = 50pF. Refer to Figure 1. (RS485)
2
1.5
VCC
VCC
V
V
Driver Common Mode Output, VOC With RL = 27Ω or 50Ω. CL = 50pF. Refer to Figure 3.
3
V
V
Change in Voltage Magnitude Differential Output Voltage, with RL = 27Ω or 50Ω, CL = 50pF.
for Complimentary States, ΔVOC Refer to Figure 1.
0.2
Change in Voltage Magnitude Common-Mode Output Voltage, with RL = 60Ω, 375Ω, 375Ω.
for Complimentary States, ΔVOC Refer to Figure 2.
0.2
V
Transmitter Short-Circuit Current Output HIGH, VOUT= -7V to +12V. Refer to Figure 7.
250
mA
mA
Output LOW, VOUT= -7V to +12V. Refer to Figure 7.
-250
-100
Output Leakage Current,
Full Duplex
V
V
IN = +12V
IN = –7V
DE = GND, Vcc = 0V or 3.6V
DE = GND, Vcc = 0V or 3.6V
125
μA
μA
Specifications subject to change without notice
Z
ywyn
3
July 2010
rev. 1.1
ASIX [ ASIX ELECTRONICS CORPORATION ]
