參數(shù)資料
型號: 74LVC2245APWDH
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: Octal transceiver with direction pin; 30 ohm series termination resistors; 5 V input/output tolerant; 3-state
中文描述: LVC/LCX/Z SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20
封裝: PLASTIC, TSSOP-20
文件頁數(shù): 2/17頁
文件大?。?/td> 104K
代理商: 74LVC2245APWDH
2003 Nov 17
2
Philips Semiconductors
Product specification
Octal transceiver with direction pin, 30
series
termination resistors; 5 V tolerant input/output; 3-state
74LVC2245A
FEATURES
5 V tolerant inputs/outputs for interfacing with 5 V logic
Wide supply voltage range from 1.2 to 3.6 V
CMOS low power consumption
Direct interface with TTL levels
Inputs accept voltages up to 5.5 V
Integrated 30
termination resistors
Complies with JEDEC standard no. 8-1A
ESD protection:
HBM EIA/JESD22-A114-A exceeds 2000 V
MM EIA/JESD22-A115-A exceeds 200 V.
Specified from
40 to +85
°
C and
40 to +125
°
C.
DESCRIPTION
The 74LVC2245A is a high-performance, low-power,
low-voltage, Si-gate CMOS device, superior to most
advanced CMOS compatible TTL families.
Inputs can be driven from either 3.3 or 5 V devices. In
3-state operation, outputs can handle 5 V. These features
allow the use of these devices as translators in a mixed
3.3 and 5 V environment.
The 74LVC2245A is an octal transceiver featuring
non-inverting 3-state bus compatible outputs in both send
and receive directions.
The 74LVC2245A features 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.
The74LVC2245Aisdesignedwith30
seriestermination
resistors in both HIGH and LOW output stages to reduce
line noise.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
2.5 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
×
N +
Σ
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts;
N = total load switching outputs;
Σ
(C
L
×
V
CC2
×
f
o
) = sum of the outputs.
The condition is V
I
= GND to V
CC
.
2.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
t
PHL
/t
PLH
C
I
C
PD
propagation delay A
n
to B
n
, B
n
to A
n
input capacitance
power dissipation capacitance per buffer
C
L
= 50 pF; V
CC
= 3.3 V
3.6
4.0
13
ns
pF
pF
V
CC
= 3.3 V; notes 1 and 2
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74LVC2245A Octal transceiver with direction pin;with 30Ω series termination resistors; with 5-volt tolerant inputs/outputs (3-State)(帶30Ω系列終端電阻器,5V輸入/輸出容限的八收發(fā)器(三態(tài)))
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