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參數(shù)資料
| 型號： | SN74LV4040ADBLE |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 計數(shù)器 |
| 英文描述： | LV/LV-A/LVX/H SERIES, ASYN NEGATIVE EDGE TRIGGERED 12-BIT UP BINARY COUNTER, PDSO16 |
| 封裝： | SSOP-16 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 246K |
| 代理商： | SN74LV4040ADBLE |
SN54LV4040A, SN74LV4040A
12-BIT ASYNCHRONOUS BINARY COUNTERS
SCES226B – APRIL 1999 – REVISED MAY 2000
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
50% VCC
VCC
0 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Data Input
tPLH
tPHL
tPLH
VOH
VOL
VCC
0 V
50% VCC
Input
Out-of-Phase
Output
In-Phase
Output
Timing Input
50% VCC
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
Output
Control
Output
Waveform 1
S1 at VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
≈VCC
0 V
50% VCC
VOL + 0.3 V
50% VCC
≈0 V
VCC
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open Drain
Open
VCC
GND
VCC
TEST
S1
VCC
0 V
50% VCC
tw
VOLTAGE WAVEFORMS
PULSE DURATION
Input
NOTES: A. CL includes probe and jig capacitance.
B. 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.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤ 1 MHz, ZO = 50 , tr ≤ 3 ns, tf ≤ 3 ns.
D. The outputs are measured one at a time with one input transition per measurement.
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT FOR
3-STATE AND OPEN-DRAIN OUTPUTS
S1
VCC
RL = 1 k
GND
From Output
Under Test
CL
(see Note A)
Test
Point
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
Open
50% VCC
VOH – 0.3 V
Figure 1. Load Circuit and Voltage Waveforms
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