參數(shù)資料
型號(hào)： SN74HC590ADTE4
廠商： TEXAS INSTRUMENTS INC
元件分類： 計(jì)數(shù)器
英文描述： HC/UH SERIES, ASYN POSITIVE EDGE TRIGGERED 8-BIT UP BINARY COUNTER, PDSO16
封裝： GREEN, PLASTIC, MS-012AC, SOIC-16
文件頁(yè)數(shù)： 2/23頁(yè)
文件大?。?/td> 804K
代理商： SN74HC590ADTE4
SN54HC590A, SN74HC590A
8BIT BINARY COUNTERS
WITH 3STATE OUTPUT REGISTERS
SCLS039F DECEMBER 1982 REVISED SEPTEMBER 2003
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORMS
SETUP AND HOLD AND INPUT RISE AND FALL TIMES
VOLTAGE WAVEFORMS
PULSE DURATIONS
th
tsu
VCC
0 V
tr
tf
Reference
Input
Data
Input
High-Level
Pulse
VCC
0 V
VCC
0 V
tw
Low-Level
Pulse
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
50%
10%
90%
VCC
VOH
VOL
0 V
tr
tf
Input
In-Phase
Output
50%
tPLH
tPHL
50%
10%
90%
VOH
VOL
tr
tf
tPHL
tPLH
Out-of-
Phase
Output
VCC
≈VCC
VOL
0 V
Output
Control
(Low-Level
Enabling)
Output
Waveform 1
(See Note B)
tPZL
tPLZ
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
VOH
≈0 V
tPZH
tPHZ
Output
Waveform 2
(See Note B)
≈VCC
Test
Point
From Output
Under Test
RL
VCC
S1
S2
LOAD CIRCUIT
PARAMETER
CL
tPZH
tpd or tt
tdis
ten
tPZL
tPHZ
tPLZ
1 k
1 k
50 pF
or
150 pF
50 pF
Open
Closed
RL
S1
Closed
Open
S2
Open
Closed
Open
50 pF
or
150 pF
Open
NOTES: A. CL includes probe and test-fixture 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. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR
≤ 1 MHz, ZO = 50 , tr = 6 ns, tf = 6 ns.
D. The outputs are measured one at a time with one input transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
CL
(see Note A)
50%
10%
90%
50%
10%
90%
50%
90%
10%
Figure 1. Load Circuit and Voltage Waveforms
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