參數(shù)資料
型號(hào): 74ABT2245N
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: Octal transceiver with direction pin with 30ohm series termination resistors 3-State
中文描述: ABT SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDIP20
文件頁數(shù): 6/12頁
文件大?。?/td> 107K
代理商: 74ABT2245N
Philips Semiconductors
Product specification
74ABT2245
Octal transceiver with direction pin
and 30
series termination resistors (3-State)
1998 Jan 16
6
AC CHARACTERISTICS
GND = 0V; t
R
= t
F
= 2.5ns; C
L
= 50pF, R
L
= 500
LIMITS
SYMBOL
PARAMETER
WAVEFORM
T
amb
= +25
°
C
V
CC
= +5.0V
T
amb
= –40
°
C to +85
°
C
CC
= +5.0V
±
0.5V
UNIT
Min
Typ
Max
Min
Max
t
PLH
t
PHL
Propagation delay
An to Bn or Bn to An
1
1.0
1.0
2.8
3.9
4.2
5.0
1.0
1.0
4.7
5.4
ns
t
PZH
t
PZL
Output enable time
to High and Low level
2
1.3
3.0
3.5
5.5
4.6
7.0
1.3
3.0
5.5
7.8
ns
t
PHZ
t
PLZ
Output disable time
from High and Low Level
2
1.5
1.0
4.0
3.4
5.4
4.6
1.5
1.0
6.3
5.0
ns
AC WAVEFORMS
V
M
= 1.5V, V
IN
= GND to 3.0V
An or Bn
INPUT
V
M
V
M
Bn or An
OUTPUT
V
M
V
M
t
PLH
t
PHL
SA00124
Waveform 1. Waveforms Showing the Input to Output
Propagation Delays
OE
INPUT
V
M
V
M
t
PZH
t
PHZ
OUTPUT
V
OH
V
OH
– 0.3V
V
M
V
M
OUTPUT
V
OL
t
PZL
t
PLZ
3.5V
0V
SA00314
V
OL
+ 0.3V
Waveform 2. Waveforms Showing the 3-State Output Enable
and Disable Times
TEST CIRCUIT AND WAVEFORMS
C
L
= 50 pF
500
Load Circuit
DEFINITIONS
C
L
=
Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
TEST
S1
t
pd
open
t
PLZ
/t
PZL
7 V
t
PHZ
/t
PZH
open
SA00012
500
From Output
Under Test
S1
7 V
Open
GND
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