參數(shù)資料
型號(hào)： 74LVCH244A
廠商： NXP Semiconductors N.V.
元件分類(lèi)： 通用總線功能
英文描述： 14-Bit Asynchronous Binary Counters 16-TSSOP -40 to 85
中文描述： 八路緩沖器/線路驅(qū)動(dòng)器5伏耐輸入/輸出3 - Statetitle
文件頁(yè)數(shù)： 2/10頁(yè)
文件大小： 96K
代理商： 74LVCH244A
Philips Semiconductors
Product specification
74LVC244A
74LVCH244A
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
2
1998 May 20
853-1876 19419
FEATURES
5-volt tolerant inputs/outputs, for interfacing with 5-volt logic
Supply voltage range of 2.7V to 3.6V
Complies with JEDEC standard no. 8-1A
CMOS low power consumption
Direct interface with TTL levels
High impedance when V
CC
= 0V
Bushold on all data inputs (74LVCH244A only)
DESCRIPTION
The 74LVC244A/74LVCH244A 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 3.3V or 5V devices. In 3-State
operation, outputs can handle 5V. These features allow the use of
these devices as translators in a mixed 3.3V/5V environment.
The 74LVC244A/74LVCH244A is an octal non-inverting buffer/line
driver with 3-State outputs. The 3-State outputs are controlled by the
output enable inputs 1OE and 2OE. A HIGH on nOE causes the
outputs to assume a high impedance OFF-state. Schmitt-trigger
action at all inputs makes the circuit highly tolerant for slower input
rise and fall times.
The ’244’ is functionally identical to the ’240’, but the ’240’ has
non-inverting outputs.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
t
PHL
PLH
/t
Propagation delay
1A to 1Y
n;
2A
n
to 2Y
n
C
L
= 50pF
= 3 3V
V
CC
= 3.3V
3 5
3.5
ns
C
I
Input capacitance
4.4
pF
C
PD
Power dissipation capacitance per
buffer
Notes 1 and 2
22.6
pF
NOTE:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in W):
P
D
= C
PD
x V
CC2
x f
i
+ (C
L
x V
CC2
x f
o
) where:
f
i
= input frequency in MHz; C
L
= output load capacity in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
x V
CC2
x f
o
) = sum of outputs.
2. The condition is V
I
= GND to V
CC
ORDERING INFORMATION
PACKAGES
TEMPERATURE
RANGE
OUTSIDE
NORTH AMERICA
NORTH AMERICA
PKG. DWG. #
20-Pin Plastic Shrink Small Outline (SO)
–40
°
C to +85
°
C
74LVC244A D
74LVC244A D
SOT163-1
20-Pin Plastic Shrink Small Outline (SSOP) Type II
–40
°
C to +85
°
C
74LVC244A DB
74LVC244A DB
SOT339-1
20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I
–40
°
C to +85
°
C
74LVC244A PW
7LVC244APW DH
SOT360-1
20-Pin Plastic Shrink Small Outline (SO)
–40
°
C to +85
°
C
74LVCH244A D
74LVCH244A D
SOT163-1
20-Pin Plastic Shrink Small Outline (SSOP) Type II
–40
°
C to +85
°
C
74LVCH244A DB
74LVCH244A DB
SOT339-1
20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I
–40
°
C to +85
°
C
74LVCH244A PW
LVCH244APW DH
SOT360-1
相關(guān)PDF資料
PDF描述
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74LVCH244ABQ-Q100X 制造商:NXP Semiconductors 功能描述:74LVCH244ABQ-Q100/DHVQFN20/REE - Tape and Reel 制造商:NXP Semiconductors 功能描述:IC BUFFER/LINE DVR OCT 20DHVQFN
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