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参数资料
| 型号： | SN54AHCT257WR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | AHC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CDFP16 |
| 封装： | CERAMIC, FP-16 |
| 文件页数： | 4/7页 |
| 文件大小： | 112K |
| 代理商： | SN54AHCT257WR |
SN54AHCT257, SN74AHCT257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SCLS351E – MAY 1996 – REVISED OCTOBER 1998
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C
SN54AHCT257
SN74AHCT257
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
V
IOH = –50 mA
45 V
4.4
4.5
4.4
V
VOH
IOH = –8 mA
4.5 V
3.94
3.8
V
IOL = 50 mA
45 V
0.1
V
VOL
IOL = 8 mA
4.5 V
0.36
0.44
V
II
VI = VCC or GND
5.5 V
±0.1
±1
mA
ICC
VI = VCC or GND,
IO = 0
5.5 V
4
40
mA
ICC
One input at 3.4 V,
Other inputs at VCC or GND
5.5 V
1.35
1.5
mA
IOZ
VO = VCC or GND
5.5 V
±0.25
±2.5
mA
Ci
VI = VCC or GND
5 V
pF
This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC.
switching characteristics over recommended operating free-air temperature range,
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
FROM
TO
LOAD
SN54AHCT257
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
TA = 25°C
MIN
MAX
UNIT
(INPUT)
(OUTPUT)
CAPACITANCE
MIN
TYP
MAX
MIN
MAX
tPLH*
AorB
Y
CL =15 pF
ns
tPHL*
A or B
Y
CL = 15 pF
ns
tPLH*
A/B
Y
CL =15 pF
ns
tPHL*
A/B
Y
CL = 15 pF
ns
tPZH*
OE
Y
CL =15 pF
ns
tPZL*
OE
Y
CL = 15 pF
ns
tPHZ*
OE
Y
CL =15 pF
ns
tPLZ*
OE
Y
CL = 15 pF
ns
tPLH
AorB
Y
CL =50 pF
ns
tPHL
A or B
Y
CL = 50 pF
ns
tPLH
A/B
Y
CL =50 pF
ns
tPLH
A/B
Y
CL = 50 pF
ns
tPZH
OE
Y
CL =50 pF
ns
tPZL
OE
Y
CL = 50 pF
ns
tPHZ
OE
Y
CL =50 pF
ns
tPLZ
OE
Y
CL = 50 pF
ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
PRODUCT
PREVIEW
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