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參數(shù)資料
| 型號(hào)： | 74AC16474 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 18-Bit Registered Bus Transceivers With 3-State Outputs(18位記錄總線收發(fā)器(三態(tài)輸出)) |
| 中文描述： | 18位注冊(cè)總線收發(fā)器與三態(tài)輸出（18位記錄總線收發(fā)器（三態(tài)輸出）） |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 92K |
| 代理商： | 74AC16474 |
SCAS399A – JANUARY 1992
54AC16474, 74AC16474
18-BIT REGISTERED BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
7
PARAMETER MEASUREMENT INFORMATION
th
tsu
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT FOR OUTPUTS
S1
2 x VCC
Open
GND
500
500
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
2 x VCC
GND
tPLH
tPHL
Output
PROPAGATION DELAY TIMES
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2 x VCC
(see Note C)
Output
Waveform 2
S1 at GND
(see Note C)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
1.5 V
1.5 V
1.5 V
1.5 V
VCC
3 V
0 V
50% VCC
50% VCC
VOH
VOL
0 V
50% VCC
20% VCC
50% VCC
80% VCC
0 V
ENABLE AND DISABLE TIMES
VOLTAGE WAVEFORMS
VOLTAGE WAVEFORMS
3 V
Data Input
Timing Input
(See Note B)
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
1.5 V
3 V
0 V
1.5 V
1.5 V
3 V
0 V
3 V
0 V
1.5 V
1.5 V
tw
PULSE DURATION
VOLTAGE WAVEFORMS
Input
Input
(See Note B)
≈
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR
≤
10 MHz, Zo = 50
, tr
≤
3 ns, tf
≤
3 ns.
For testing pulse duration: tr = tf = 1 to 3 ns. Pulse polarity can be either high-to-low-to-high or low-to-high-to-low.
C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
D. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
P
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