CN8223
4.0 Electrical and Mechanical Specifications
ATM Transmitter/Receiver with UTOPIA Interface
4.2 DC Characteristics
Table 4-1 defines the DC characteristics.
Table 4-1. DC Characteristics
Symbol Parameter
VT
Conditions
Min
Typical
2.5
Max
Unit
Switching threshold
CMOS
TTL
—
—
1.5
—
V
VT+
Schmitt Trigger,
positive-going threshold
CMOS
TTL
1.77
2.0
2.0
2.25
V
V
VT–
Schmitt Trigger,
negative-going threshold
CMOS (5 V)
TTL
1.0
0.8
1.5
1.04
—
—
Schmitt Trigger Input
Hysteresis Voltage
CMOS VIL to VIH
TTL VIL to VIH
1.0
0.4
1.5
0.8
V
IIN
Inputs
VIN = VDD
VIN = VDD
–10
10
µA
µA
1
Inputs with pulldown
resistors (5 V)
35
115
222
Inputs with pullup resistors
(5 V)
VIN = VSS
–35
–115
–214
µA
VOH
VOL
Voltage output HIGH
4 mA outputs
Commercial /military
IOH = –4 mA
—
—
V
2.4
2.4
8 mA outputs
IOH = –8 mA
Voltage output LOW
4 mA outputs
Commercial /military
IOL = –4 mA
—
—
V
V
2.4
2.4
8 mA outputs
IOL = –8 mA
IDD
VIL
Quiescent supply current
VIN = VDD or VSS
User-Design Dependent
Voltage Input Low
CMOS Levels
—
—
—
0.2
VDD
TTL Inputs
0.8
VDD
VIH
IOS
Voltage Input High
CMOS Levels
TTL Inputs
TTL Schmitt Trigger
Inputs
—
—
0.7
VDD
2.0
2.25
V
V
V
Comm./Ind./Mil. temp
range
Ind./Mil. temp range
Output short circuit current
4 mA outputs
VDD = 5.25 V, VO = VDD
VDD = 5.25 V, VO = VSS
VDD = 3.45 V, VO = VDD
VDD = 3.45 V, VO = VSS
37
–117
50
–99
90
140
–40
182
–31
mA
–75
110
–60
IOZ
Three-state Output Leakage
Current
VOH = VSS or VDD
–10
2.5
2.0
1
10
µA
pF
pF
CIN
Input Capacitance
Any input and
bidirectional buffers
COUT
Output Capacitance
—
100046C
Conexant
4-3
CONEXANT [ CONEXANT SYSTEMS, INC ]
