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参数资料
| 型号： | 74AHC245 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | Octal bus transceiver; 3-state(八通道总线收发器；三态) |
| 中文描述： | 八路总线收发器，3态（八通道总线收发器，三态） |
| 文件页数： | 2/20页 |
| 文件大小： | 88K |
| 代理商： | 74AHC245 |
1999 Sep 28
2
Philips Semiconductors
Product specification
Octal bus transceiver; 3-state
74AHC245; 74AHCT245
FEATURES
ESD protection:
HBM EIA/JESD22-A114-A
exceeds 2000 V
MM EIA/JESD22-A115-A
exceeds 200 V
CDM EIA/JESD22-C101
exceeds 1000 V
Balanced propagation delays
All inputs have a Schmitt-trigger
action
Inputsacceptsvoltageshigherthan
V
CC
For AHC only:
operates with CMOS input levels
For AHCT only:
operates with TTL input levels
Specified from
40 to +85 and +125
°
C.
DESCRIPTION
The 74AHC/AHCT245 is a
high-speed Si-gate CMOS device.
The 74AHC/AHCT245 is an octal
transceiver featuring non-inverting
3-state bus compatible outputs in
both send and receive directions.
The74AHC245/74AHCT245features
an Output Enable (OE) input for easy
cascading and a send/receive (DIR)
input for direction control.
OE controls the outputs so that the
buses are effectively isolated.
FUNCTION TABLE
See Note 1.
Note
1.
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
≤
3.0 ns.
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W).
P
D
= C
PD
×
V
CC2
×
f
i
+
∑
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts.
The condition is V
I
= GND to V
CC
.
2.
INPUTS
INPUTS/OUTPUTS
OE
DIR
A
n
B
n
L
L
H
L
H
X
A = B
inputs
Z
inputs
B = A
Z
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
AHC
AHCT
t
PHL
/t
PLH
propagation delay
A
n
to B
n
, B
n
to A
n
input capacitance
output
capacitance
power dissipation
capacitance
C
L
= 15 pF;
V
CC
= 5 V
3.5
5.0
ns
C
I
C
O
V
I
= V
CC
or GND 3.5
3.5
4.0
pF
pF
4.0
C
PD
C
L
= 50 pF;
f = 1 MHz;
notes 1 and 2
12
15
pF
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相关代理商/技术参数 |
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|---|---|
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| 74AHC245BQ-Q100X | 制造商:NXP Semiconductors 功能描述:74AHC245BQ-Q100/DHVQFN20/REEL7 制造商:NXP Semiconductors 功能描述:74AHC245BQ-Q100/DHVQFN20/REEL7 - Tape and Reel 制造商:NXP Semiconductors 功能描述:IC TXRX OCTAL BUS 3ST 20DHVQFN |
| 74AHC245D | 功能描述:总线收发器 OCTAL TRANSCVR 3-S RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| 74AHC245D,112 | 功能描述:总线收发器 OCTAL TRANSCVR 3-S RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
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