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SN54ALS29821 Datasheet(PDF) 5 Page - Texas Instruments

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Part # SN54ALS29821
Description  10-BIT BUS-INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN54ALS29821 Datasheet(HTML) 5 Page - Texas Instruments

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SN54ALS29821, SN74ALS29821
10-BIT BUS-INTERFACE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SDAS145B – JANUARY 1986 – REVISED JANUARY 1995
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
LOAD CIRCUIT
R1
1 k
All Diodes
1N916 or 1N3064
From Output
Under Test
Test Point
S2
CL
(see Note A)
RL = 180 Ω
1.5 V
1.5 V
1.5 V
3 V
3 V
0
0
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing Input
Data Input
1.5 V
1.5 V
3 V
3 V
0
0
High-Level
Pulse
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATIONS
1.5 V
1.5 V
tPHL
tPLH
tPLH
tPHL
Out-of-Phase
Output
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
3 V
0
VOL
VOH
VOH
VOL
In-Phase
Output
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
tPHZ
tPLZ
0.5 V
tPZL
tPZH
1.5 V
1.5 V
1.5 V
1.5 V
3 V
0
Output
Control
Waveform 1
(see Note B)
Waveform 2
(see Note B)
≈ 0
VOH
VOL
≈ 1.5 V
0.5 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
VCC
S1
SWITCH POSITION TABLE
TEST
S1
S2
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Closed
Closed
Open
Closed
Closed
Closed
Closed
Closed
Closed
Open
Closed
Closed
≈ 4.5 V
≈ 1.5 V
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
≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
Figure 1. Load Circuit and Voltage Waveforms


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