参数资料
型号: SN74AS651-1NT
厂商: TEXAS INSTRUMENTS INC
元件分类: 总线收发器
英文描述: AS SERIES, 8-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PDIP24
封装: 0.300 INCH, PLASTIC, DIP-24
文件页数: 14/25页
文件大小: 380K
代理商: SN74AS651-1NT
SN54ALS652, SN54ALS653, SN54AS651, SN54AS652
SN74ALS651A, SN74ALS652A, SN74ALS653, SN74ALS654, SN74AS651, SN74AS652
OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SDAS066F – DECEMBER 1983 – REVISED OCTOBER 1996
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
tPHZ
tPLZ
tPHL
tPLH
0.3 V
tPZL
tPZH
TEST
S1
Open
tPHL
tPZH
tPZL
Closed
Open
Closed
tPHZ
tPLZ
tPLH
tPHL
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
From Output
Under Test
Test Point
R1 = 500
S1
CL = 50 pF
(see Note A)
7 V
Open
1.3 V
3.5 V
0.3 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing
Input
Data
Input
1.3 V
3.5 V
0.3 V
High-Level
Pulse
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATION
Input
Out-of-Phase
Output
1.3 V
3.5 V
0.3 V
VOL
VOH
VOL
Output
Control
Waveform 1
S1 Closed
(see Note B)
Waveform 2
S1 Open
(see Note B)
0 V
VOH
VOL
3.5 V
In-Phase
Output
0.3 V
tPLH
1.3 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
SWITCH POSITION TABLE
R2 = 500
VCC
RL
Test Point
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
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 ≤ 2 ns, tf ≤ 2 ns.
D. The outputs are measured one at a time with one transition per measurement.
Figure 2. Load Circuits and Voltage Waveforms
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