3
August 2004
rev.1.2
Zywyn
Specifications subject to change without notice
Zywyn Corporation
ZT4xxE
DC Electrical Characteristics
Unless otherwise stated, V
CC = +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
DE, DI, RE
TTL Logic Output
RO
High Z
O/P when disabled
RS485 Input
A, B
RS485 Output
Y, Z
High Z
O/P when disabled
Power Pin
V
CC, VGND
Temp 0°C to +70°C
Commercial Grade
0
+25
+70
°C
Temp –40°C to +85°C
Industrial Grade
–40
+25
+85
°C
V
CC Voltage Range
V
CC = +5.0V Supply
4.75
5.0
5.25
V
Supply Current
I
CC, Tx and Rx active
DI=V
CC/GND, DE=VCC, RE=GND, RS485 I/P=Open
400
900
µA
I
CC, Tx active
DI=V
CC/GND, DE=VCC, RE=VCC, RS485 I/P=Open
400
900
µA
I
CC, Rx active
DI=V
CC/GND, DE=GND, RE=GND, RS485 I/P=Open
400
900
µA
I
SD, Shutdown Current
DI=V
CC/GND, DE = GND, RE = VCC, RS485 I/P=Open
1.0
10
µA
TTL LOGIC Input
Input Threshold Low
V
CC = +5.0V Supply, DE, DI, and RE
0.8
V
Input Threshold High
V
CC = +5.0V Supply, DE, DI, and RE
2.0
V
TTL LOGIC Output
Output Voltage Low
I
OUT = +4mA, Input Differential Voltage = 200mV
0.4
V
Output Voltage High
I
OUT = –4mA, Input Differential Voltage = 200mV
3.5
V
Output Leakage Current
Receiver Outputs Disabled, V
OUT = 0.4V to 2.4V
±1
µA
Short Circuit Current
V
OUT = 0V to VCC
795
mA
Receiver Input
Input Current
DE = 0V, V
CC = 0V to 5.25V, VIN = +12V
1.0
mA
DE = 0V, V
CC = 0V to 5.25V, VIN = –7V
–0.8
mA
DIfferentialThresholdVoltage,V
TH VCM = 0V, VCC=+5.0V, TA=25
oC
–0.2
+0.2
V
Input Hysteresis
V
CM = 0V
20
mV
Input Resistance, R
IN
V
CM = -7V to +12V
12
k
Ω
Transmitter Output
DIfferentialOutputVoltage,V
OD
No Load
5V
DIfferentialOutputVoltage,dV
OD
With R
L = 50Ω, CL = 50pF, Refers to figure 1. (RS422)
2
V
With R
L = 27Ω, CL = 50pF, Refers to figure 1. (RS485)
1.5
5
V
DriverCommonModeOutput
With R
L = 27Ω or 50Ω. CL = 50pF. Refers to figure 3.
3
V
ChangeinVoltageMagnitude
Differential Output Voltage, with R
L = 27Ω or 50Ω, CL = 50pF.
0.2
V
forComplimentaryStates,dV
OC
Refers to figure 1.
ChangeinVoltageMagnitude
Common-Mode Output Voltage, with R
L = 60Ω,375Ω,375Ω.
0.2
V
forComplimentaryStates,V
OC
Refers to figure 2.
TransmitterShort-CircuitCurrent
Output HIGH, V
OUT= -7V to +12V. Refers to figure 7.
250
mA
Output LOW, V
OUT= -7V to +12V. Refers to figure 7.
250
mA
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