Commercial Version (Continued)
ECL-to-TTL DC Electrical Characteristics (Note 10)
VEE = −4.2V to −5.7V, GND = 0V, TC = 0°C to +85°C, CL = 50 pF, VTTL = +4.5V to +5.5V
Symbol
Parameter
Min
2.7
2.4
Typ
3.1
2.9
0.3
Max
Units
V
Conditions
OH = −3 mA, VTTL = 4.75V
OH = −3 mA, VTTL = 4.50V
OL = 24 mA, VTTL = 4.50V
VOH
Output HIGH Voltage
I
I
I
V
VOL
VIH
Output LOW Voltage
0.5
V
Input HIGH Voltage
−1165
−1830
−870
−1475
mV
mV
mV
V
Guaranteed HIGH Signal for All Inputs
Guaranteed LOW Signal for All Inputs
Required for Full Output Swing
VIL
Input LOW Voltage
VDIFF
VCM
IIH
Input Voltage Differential
Common Mode Voltage
Input HIGH Current
150
GNDECL − 2.0
GNDECL − 0.5
30
µA
µA
µA
µA
mA
µA
µA
mA
mA
mA
V
V
V
V
V
V
V
IN = VIH (Max)
IN = VIL (Min)
OUT = +2.7V
IIL
Input LOW Current
0.50
IOZHT
IOZLT
IOS
3-STATE Current Output High
3-STATE Current Output Low
Output Short-Circuit Current
Output HIGH Leakage Current
Bus Drainage Test
70
−650
−100
OUT = +0.5V
−225
50
OUT = 0.0V, VTTL = +5.5V
OUT = 5.5V
ICEX
IZZ
500
39
OUT = 5.25V
ITTL
VTTL Supply Current
TTL Outputs LOW
27
TTL Outputs HIGH
TTL Outputs in 3-STATE
39
Note 10: The specified limits represent the “worst case” value for the parameter. Since these values normally occur at the temperature extremes, additional
noise immunity and guardbanding can be achieved by decreasing the allowable system operating ranges. Conditions for testing shown in the tables are cho-
sen to guarantee operation under “worst case” conditions.
DIP and PCC TTL-to-ECL AC Electrical Characteristics
VEE = −4.2V to −5.7V, VTTL = +4.5V to +5.5V
T
C = 0°C
T
C = 25°C
T
C = 85°C
Symbol
Parameter
Toggle Frequency
Units
Conditions
Min
Max
Min
Max
Min
Max
fMAX
tPLH
tPHL
tPLH
tPHL
180
180
180
MHz
Tn to En, En
0.90
2.10
2.70
8.00
2.70
2.70
0.80
1.50
2.80
1.40
1.40
2.20
2.70
6.90
2.90
2.90
0.70
1.80
2.80
1.70
1.80
2.50
3.10
5.80
3.40
3.50
ns
ns
ns
ns
ns
Figures 1, 3
(Transparent)
LE to En, En
1.40
2.90
1.30
1.30
Figures 1, 3
Figures 1, 3
Figures 1, 3
Figures 1, 3
tPZH
tPHZ
tPHZ
OE to En, En
(Cutoff to HIGH)
OE to En, En
(HIGH to Cutoff)
DIR to En, En
(HIGH to Cutoff)
Tn to LE
tS
0.70
0.90
0.70
0.80
0.70
0.70
ns
ns
Figures 1, 3
Figures 1, 3
tH
Tn to LE
tTLH
tTHL
Transition Time
20% to 80%, 80% to 20%
0.45
1.50
0.45
1.50
0.45
1.50
ns
Figures 1, 3
5
www.fairchildsemi.com
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
