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參數(shù)資料
| 型號： | 933739510602 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | F/FAST SERIES, OCTAL 1-BIT DRIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | 7.50 MM, PLASTIC, MS-013AC, SO-20 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 94K |
| 代理商： | 933739510602 |
Philips Semiconductors
Product specification
74F244/74F244B
Octal buffers (3-State)
1994 Dec 5
7
AC WAVEFORMS
For all waveforms, VM = 1.5V.
VM
Yn
Ian, Ibn
tPLH
tPHL
SF00231
Waveform 1. Propagation Delay for data to outputs
VOH–0.3V
VM
Yn
tPZH
tPHZ
SF00233
OEn
0V
Waveform 2. 3-State output enable time to high level
and output disable time from high level
VM
Yn, Yn
tsk(0)
SF00232
Yn, Yn
Waveform 3. Output skew
VOL+0.3V
VM
Yn
tPZL
tPLZ
SF00234
OEn
3.5V
Waveform 4. 3-State output enable time to low level
and output disable time from low level
TEST CIRCUIT AND WAVEFORMS
tw
90%
VM
10%
90%
VM
10%
90%
VM
10%
90%
VM
10%
NEGATIVE
PULSE
POSITIVE
PULSE
tw
AMP (V)
0V
tTHL (tf )
INPUT PULSE REQUIREMENTS
rep. rate
tw
tTLH
tTHL
1MHz
500ns 2.5ns
2.5ns
Input pulse definition
VCC
family
74F
D.U.T.
PULSE
GENERATOR
RL
CL
RT
VIN
VOUT
Test circuit for 3-State outputs
DEFINITIONS:
RL = Load resistor; see AC electrical characteristics for
value.
CL = Load capacitance includes jig and probe
capacitance; see AC electrical characteristics for
value
RT = Termination resistance should be equal to ZOUT of
pulse generators.
tTHL (tf )
tTLH (tr )
AMP (V)
amplitude
3.0V
1.5V
VM
RL
7.0V
SWITCH POSITION
TEST
SWITCH
closed
open
All other
tPLZ, tPZL
SF000235
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