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參數(shù)資料
| 型號(hào)： | CD74FCT654M |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FCT Interface Logic, Octal Bus Transceivers/ Registers, Open Drain (A Side), Three-State (B Side) |
| 中文描述： | 聯(lián)邦首都接口邏輯，八路總線收發(fā)器/寄存器，開(kāi)漏（阿方），三態(tài)（乙方） |
| 文件頁(yè)數(shù)： | 7/9頁(yè) |
| 文件大?。?/td> | 49K |
| 代理商： | CD74FCT654M |
8-7
Switching
t
r
, t
f
= 2.5ns, C
L
= 50pF, R
L
(Figures 3, 4)
PARAMETER
SYMBOL
V
CC
(V)
25
o
C
0
o
C TO 70
o
C
UNITS
TYP
MIN
MAX
Power Dissipation Capacitance
C
PD
-
-
-
-
pF
Min (Valley) V
OH
(B Side) During Switching of Other
Outputs (Output Under Test Not Switching)
V
OHV
(Figure 1)
5
0.5
-
-
V
Max (Peak) V
OL
During Switching of Other Outputs
(Output Under Test Not Switching)
V
OLP
(Figure 1)
5
1
-
-
V
Input Capacitance
C
I
-
-
-
10
pF
Three-State Output Capacitance (B Side)
C
O
-
-
-
15
pF
Off-State Output Capacitance (A Side)
C
O
-
-
-
15
pF
NOTES:
8. 5V: minimum is at 4.75V for 0
o
C to 70
o
C, typical is at 5V.
9. C
PD
, measured per flip-flop, is used to determine the dynamic power consumption. PD
(per package) = V
CC
I
CC
+
Σ
(V
CC2
f
I
C
PD
+ V
O2
f
O
C
L
+ V
CC
I
CC
D) where:
V
CC
= supply voltage
I
CC
= flow through current x unit load
C
L
= output load capacitance
D = duty cycle of input high
f
O
= output frequency
f
I
= input frequency
Test Circuits and Waveforms
NOTE:
10. Pulse Generator for All Pulses: Rate
≤
1.0MHz; Z
OUT
≤
50
;
t
f
, t
r
≤
2.5ns.
FIGURE 1. TEST CIRCUIT
FIGURE 2. SETUP, HOLD, AND RELEASE TIMING
FIGURE 3. PULSE WIDTH
3V
0
DUT
PULSE Z
O
GEN
7V
500
R
L
50pF
500
R
L
V
CC
R
T
R
T
= Z
O
V
0
C
L
V
I
t
r
, t
f
= 2.5ns
(NOTE 10)
SWITCH POSITION
TEST
SWITCH
t
PLZ
, t
PZL
, Open Drain
t
PHZ
, t
PZH
, t
PLH
, t
PHL
DEFINITIONS:
C
L
= Load capacitance, includes jig and probe
capacitance.
R
T
= Termination resistance, should be equal to Z
OUT
of
the Pulse Generator.
V
IN
= 0V to 3V.
Input: t
r
= t
f
= 2.5ns (10% to 90%), unless otherwise specified
Closed
Open
ASYNCHRONOUS CONTROL
t
H
t
SH
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
t
H
t
SH
PRESET CLEAR
CLOCK ENABLE
ETC.
SYNCHRONOUS CONTROL
t
REM
DATA
INPUT
TIMING
INPUT
t
W
LOW-HIGH-LOW
PULSE
HIGH-LOW-HIGH
PULSE
1.5V
1.5V
CD74FCT653, CD74FCT654
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