Zywyn Corporation
ZT4xxER
DCElectricalCharacteristics
Unless otherwise stated, VCC = +5.0V, TA = Tmin to Tmax, typical values apply at VCC = +5.0V and TA = 25°C.
Parameter
Condition
Min
Typ
Max
Units
TTL Logic Input
TTL Logic Output
RS485 Input
RS485 Output
Power Pin
DE, DI, RE
RO
A,B
Y, Z
VCC,VGND
High ZO/P when disabled
High ZO/P when disabled
Temp 0°C to +70°C
Temp –40°C to +85°C
VCC Voltage Range
Commercial Grade
Industrial Grade
VCC = +5.0V Supply
0
–40
4.75
+25
+25
5.0
+70
+85
5.25
°C
°C
V
Supply Current
ICC, Tx and Rx active
ICC, Txactive
DI=VCC/GND, DE=VCC, RE=GND, RS485 I/P=Open
DI=VCC/GND, DE=VCC, RE=VCC, RS485 I/P=Open
DI=VCC/GND, DE=GND, RE=GND, RS485 I/P=Open
400
400
900
900
µA
µA
I
I
CC, Rx active
400
1.0
900
10
µA
µA
SD, Shutdown Current DI=VCC/GND, DE = GND, RE = VCC, RS485 I/P=Open
TTLLOGICInput
Input Threshold Low
Input Threshold High
VCC = +5.0V Supply, DE, DI, and RE
VCC = +5.0V Supply, DE, DI, and RE
0.8
V
V
2.0
TTLLOGICOutput
Output Voltage Low
Output Voltage High
Output Leakage Current
Short Circuit Current
I
OUT = +4mA, Input Differential Voltage = 200mV
0.4
V
V
IOUT = –4mA, Input Differential Voltage = 200mV
Receiver Outputs Disabled, VOUT = 0.4V to 2.4V
VOUT = 0V to VCC
3.5
7
±1
95
µA
mA
ReceiverInput
Input Current
DE = 0V, VCC = 0V to 5.25V, VIN = +12V
DE = 0V, VCC = 0V to 5.25V, VIN = –7V
1.0
–0.8
mA
mA
DIfferentialThresholdVoltage,V VCM = 0V, VCC=+5.0V, TA=25oC
–0.2
48
+0.2
V
TH
Input Hysteresis
VCM = 0V
20
mV
kΩ
Input Resistance, RIN
VCM = -7V to +12V
Transmitter Output
DIfferentialOutputVoltage,V
No Load
5
V
OD
DIfferentialOutputVoltage,dV
With RL = 50Ω, CL = 50pF, Refers to figure 1. (RS422)
With RL = 27Ω, CL = 50pF, Refers to figure 1. (RS485)
2
1.5
V
V
OD
5
3
DriverCommonModeOutput
With RL = 27Ω or 50Ω. CL = 50pF. Refers to figure 3.
Differential Output Voltage, with RL = 27Ω or 50Ω, CL = 50pF.
Refers to figure 1.
V
V
ChangeinVoltageMagnitude
forComplimentaryStates,dV
0.2
OC
ChangeinVoltageMagnitude
forComplimentaryStates,V
Common-Mode Output Voltage, with RL = 60Ω,375Ω,375Ω.
Refers to figure 2.
0.2
V
OC
TransmitterShort-CircuitCurrent Output HIGH, VOUT= -7V to +12V. Refers to figure 7.
Output LOW, VOUT= -7V to +12V. Refers to figure 7.
250
250
mA
mA
Specifications subject to change without notice
Zywyn
3
Febuary 2005
rev.1.2