74LCX646_04 Datasheet, PDF (7/16 Pages) STMicroelectronics – LOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE)

M74LCX646
Table 8: AC Electrical Characteristics
Test Condition
Value
Symbol
Parameter
V_CC
(V)
t_PLH t_PHL
t_PLH t_PHL
t_PLH t_PHL
t_PZL t_PZH
t_PLZ t_PHZ
t_S
t_h
t_W
f_MAX
t_OSLH
t_OSHL
Propagation Delay
Time (CAB or CBA
to An or Bn)
Propagation Delay
Time (An to Bn or Bn
to An)
Propagation Delay
Time (SAB or SBA
to An or Bn)
Output Enable Time
(G, DIR to An, Bn)
Output Disable Time
(G, DIR to An, Bn)
Setup Time, HIGH or
LOW level Data to
CAB, CBA
Hold Time, HIGH or
LOW level Data to
CAB, CBA
CAB, CBA Pulse
Width, HIGH or
LOW
Clock Pulse
Frequency
Output To Output
Skew Time (note1,
2)
2.7
3.0 to 3.6
2.7
3.0 to 3.6
2.7
3.0 to 3.6
2.7
3.0 to 3.6
2.7
3.0 to 3.6
2.7
3.0 to 3.6
2.7
3.0 to 3.6
2.7
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
C_L R_L t_s = t_r
(pF) (Ω) (ns)
50 500 2.5
50 500 2.5
50 500 2.5
50 500 2.5
50 500 2.5
50 500 2.5
50 500 2.5
50 500 2.5
50 500 2.5
50 500 2.5
-40 to 85 °C
Min.
1.5
Max.
9.5
1.5
8.5
1.5
8.0
1.5
7.0
1.5
9.5
1.5
8.5
1.5
9.5
1.5
8.5
1.5
9.5
1.5
8.5
2.5
2.5
1.5
1.5
4.0
3.3
150
1.0
-55 to 125 °C
Min.
1.5
Max.
9.5
1.5
8.5
1.5
8.0
1.5
7.0
1.5
9.5
1.5
8.5
1.5
9.5
1.5
8.5
1.5
9.5
1.5
8.5
2.5
2.5
1.5
1.5
4.0
3.3
150
1.0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
MHz
ns
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW (t_OSLH = | t_PLHm - t_PLHn|, t_OSHL = | t_PHLm - t_PHLn|)
2) Parameter guaranteed by design
Table 9: Capacitive Characteristics
Test Condition
Value
Symbol
Parameter
V_CC
(V)
C_IN Input Capacitance
3.3
C_I/O I/O Capacitance
3.3
C_PD Power Dissipation Capacitance
3.3
(note 1)
V_IN = 0 to V_CC
V_IN = 0 to V_CC
f_IN = 10MHz
V_IN = 0 or V_CC
T_A = 25 °C
Unit
Min. Typ. Max.
6
pF
10
pF
37
pF
1) C_PD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I_CC(opr) = C_PD x V_CC x f_IN + I_CC/8 (per circuit)
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