GTLP18T612 Datasheet, PDF (6/9 Pages) Fairchild Semiconductor – 18-Bit LVTTL/GTLP Universal Bus Transceiver

AC Electrical Characteristics
Over recommended range of supply voltage and operating free-air temperature, V_REF = 1.0V (unless otherwise noted).
C_L = 30 pF for B Port and C_L = 50 pF for A Port.
Symbol
From
(Input)
To
(Output)
Typ
Min
(Note 11)
t_PLH
t_PHL
t_PLH
t_PHL
t_PLH
t_PHL
A
LEAB
CLKAB
B
2.1
4.1
1.0
2.7
B
2.2
4.2
1.0
2.4
B
2.2
4.4
1.0
2.5
t_PLH
t_PHL
t_RISE
t_FALL
t_PLH
t_PHL
t_PLH
t_PHL
t_PLH
t_PHL
OEAB
B
Transition time, B outputs (20% to 80%)
Transition time, B outputs (20% to 80%)
B
A
LEBA
A
CLKBA
A
2.0
3.8
1.0
2.6
3.1
2.1
1.8
3.8
1.8
3.8
0.3
2.2
0.4
2.4
0.5
2.4
0.6
2.6
t_PZH, t_PZL
t_PHZ, t_PLZ
OEBA
A
0.3
2.7
0.3
2.5
Note 11: All typical values are at V_CC = 3.3V, and T_A = 25°C.
Max
6.3
4.4
6.3
4.2
6.5
4.4
5.6
4.3
5.8
5.8
4.6
4.6
4.6
4.6
5.2
5.2
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
Extended Electrical Characteristics
Over recommended ranges of supply voltage and operating free-air temperature V_REF = 1.0V (unless otherwise noted).
C_L = 30 pF for B Port and C_L = 50 pF for A Port.
Symbol
From
(Input)
To
(Output)
Min
Typ
(Note 11)
Max
Unit
t_OSLH (Note 12)
A
B
0.8
1.0
ns
t_OSHL (Note 12)
0.3
0.5
ns
t_PV(HL) (Note 13)(Note 14)
A
B
0.8
ns
t_OSLH (Note 12)
CLKAB
B
0.9
1.0
ns
t_OSHL (Note 12)
0.3
0.5
ns
t_PV(HL) (Note 13)(Note 14)
CLKAB
B
0.8
ns
t_OSLH (Note 12)
B
A
0.7
1.0
ns
t_OSHL (Note 12)
0.6
1.0
ns
t_OST (Note 12)
B
A
0.7
1.1
ns
t_PV (Note 13)
B
A
1.5
ns
t_OSLH (Note 12)
CLKAB
A
0.5
1.0
ns
t_OSHL (Note 12)
0.6
1.0
ns
t_OST (Note 12)
CLKAB
A
1.1
1.2
ns
t_PV (Note 13)
CLKAB
A
1.5
ns
Note 12: t_OSHL/t_OSLH and t_OST - Output to output skew is defined as the absolute value of the difference between the actual propagation delay for all outputs
within the same packaged device. The specifications are given for specific worst case V_CC and temperature and apply to any outputs switching in the same
direction either HIGH-to-LOW (t_OSHL) or LOW-to-HIGH (t_OSLH) or in opposite directions both HL and LH (t_OST). This parameter is guaranteed by design and
statistical process distribution. Actual skew values between the GTLP outputs could vary on the backplane due to the loading and impedance seen by the
device.
Note 13: t_PV - Part to part skew is defined as the absolute value of the difference between the actual propagation delay for all outputs from device to device.
The parameter is specified for a specific worst case V_CC and temperature. This parameter is guaranteed by design and statistical process distribution. Actual
skew values between the GTLP outputs could vary on the backplane due to the loading and impedance seen by the device.
Note 14: Due to the open drain structure on GTLP outputs t_OST and t_PV(LH) in the A-to-B direction are not specified. Skew on these paths is dependent on the
V_TT and R_T values on the backplane.
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