參數(shù)資料
型號(hào)： 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(yè)數(shù)： 9/12頁(yè)
文件大小： 94K
代理商： 933739510602
Philips Semiconductors
Product specification
74F244/74F244B
Octal buffers (3-State)
1994 Dec 5
6
AC ELECTRICAL CHARACTERISTICS FOR 74F244
A PORT LIMITS
Tamb = +25°C
Tamb = 0°C to +70°C
Tamb = -40°C to +85°C
SYMBOL
PARAMETER
TEST
VCC = +5.0V
VCC = +5.0V ± 10%
UNIT
CONDITION
CL = 50pF,
RL = 500
CL = 50pF,
RL = 500
CL = 50pF,
RL = 500
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
Waveform 1
2.5
4.0
5.2
2.0
6.2
6.5
1.5
2.0
7.0
ns
tPZH
tPZL
Output enable time
to high or low
Waveform 2
Waveform 4
2.0
4.3
5.0
5.7
7.0
2.0
6.7
8.0
2.0
8.0
8.5
ns
tPHZ
tPLZ
Output disable time
from high or low
Waveform 2
Waveform 4
1.5
2.5
5.5
1.0
6.0
5.5
1.0
6.0
5.5
ns
AC ELECTRICAL CHARACTERISTICS FOR 74F244B
LIMITS
Tamb = +25°C
Tamb = 0°C to +70°C
SYMBOL
PARAMETER
TEST
VCC = +5.0V
VCC = +5.0V ± 10%
UNIT
CONDITION
CL = 50pF, RL = 500
MIN
TYP
MAX
MIN
MAX
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
Waveform 1
2.5
4.5
5.7
6.0
2.0
2.5
6.2
6.5
ns
tPZH
tPZL
Output enable time
to high or low level
Waveform 2
Waveform 4
2.0
3.0
4.0
5.5
6.0
7.5
2.0
3.0
6.5
8.0
ns
tPHZ
tPLZ
Output disable time
from high or low level
Waveform 2
Waveform 4
1.5
2.5
5.5
1.0
6.0
5.5
ns
tsk(0)
Output skew1, 2
Waveform 3
1.5
2.0
ns
NOTES:
1. |tPN actual - tPM actual| for any output compared to any other output where N and M are either LH or HL.
2. Skew times are valid only under same test conditions (temperature, VCC, loading, etc.,).
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