參數(shù)資料
型號(hào): SN74ABT18245ADGG
廠商: TEXAS INSTRUMENTS INC
元件分類: 總線收發(fā)器
英文描述: ABT SERIES, DUAL 9-BIT BOUNDARY SCAN TRANSCEIVER, TRUE OUTPUT, PDSO56
封裝: PLASTIC, TSSOP-56
文件頁(yè)數(shù): 20/31頁(yè)
文件大?。?/td> 438K
代理商: SN74ABT18245ADGG
SN54ABT18245A, SN74ABT18245A
SCAN TEST DEVICES
WITH 18-BIT BUS TRANSCEIVERS
SCBS110H – AUGUST 1992 – REVISED FEBRUARY 1999
27
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
1.5 V
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
7 V
Open
GND
500
500
Timing Input
1.5 V
3 V
0 V
3 V
0 V
1.5 V
tw
Input
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS
PULSE DURATION
tPLH
tPHL
tPLH
VOH
VOL
1.5 V
3 V
0 V
1.5 V
Input
1.5 V
Output
Control
Output
Waveform 1
S1 at 7 V
(see Note B)
Output
Waveform 2
S1 at Open
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
1.5 V
3.5 V
0 V
1.5 V
VOL + 0.3 V
1.5 V
VOH – 0.3 V
[ 0 V
3 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
Output
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
7 V
Open
TEST
S1
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 , tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
th
tsu
Data Input
1.5 V
3 V
0 V
1.5 V
Figure 14. Load Circuit and Voltage Waveforms
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