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74LVT373D 반도체 회로 부품 판매점

3.3 Volt ABT octal transparent latch 3-State



NXP Semiconductors 로고
NXP Semiconductors
74LVT373D 데이터시트, 핀배열, 회로
Philips Semiconductors Low Voltage Products
3.3 Volt ABT octal transparent latch (3–State)
Objective specification
74LVT373
FEATURES
Designed for use in the 3.3V
high–performance market
Supports mixed–mode signal operation; 5V
input and output voltages with 3.3V VCC
Bus–hold inputs eliminate the need for
external pull-up resistors to hold unused
pins
Live insertion/extraction permitted
No bus current loading when output is tied
to 5V bus
8–bit transparent latch
3-State output buffers
Zero-static power dissipation
Pin and function compatibility with ABT
AC and DC performance compatibility with
ABT
Latch–up protection exceeds 500mA per
JEDEC JC40.2 Std 17
ESD protection exceeds 2000 V per MIL
STD 883 Method 3015 and 200 V per
Machine Model
DESCRIPTION
The 74LVT373 device is designed specifically
for low–voltage (3.3V) VCC operation, but can
provide a TTL interface to a 5V system
environment.
The 74LVT373 high-performance BiCMOS
device combines zero static and low dynamic
power dissipation with high speed and high
output drive.
The 74LVT373 device is an octal transparent
latch coupled to eight 3-State output buffers.
The two sections of the device are controlled
independently by Enable (E) and Output
Enable (OE) control gates.
The data on the D inputs are transferred to
the latch outputs when the Latch Enable (E)
input is High. The latch remains transparent
to the data inputs while E is High, and stores
the data that is present one setup time before
the High-to-Low enable transition.
The 3-State output buffers are designed to
drive heavily loaded 3-State buses, MOS
memories, or MOS microprocessors. The
active-Low Output Enable (OE) controls all
eight 3-State buffers independent of the latch
operation.
When OE is Low, the latched or transparent
data appears at the outputs. When OE is
High, the outputs are in the High-impedance
”OFF” state, which means they will neither
drive nor load the bus.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
tPLH
tPHL
CIN
COUT
ICCZ
Propagation delay
Dn to Qn
Input capacitance
Output capacitance
Total supply current
CONDITIONS
Tamb = 25°C; GND = 0V
CL = 50pF; VCC = 5V
VI = 0V or VCC
VI = 0V or VCC
Outputs disabled; VCC =5.5V
TYPICAL
4.2
4
7
50
UNIT
ns
pF
pF
µA
ORDERING INFORMATION
PACKAGES
20–Pin Plastic SOL
20–Pin Plastic SSOP
20–Pin Plastic TSSOP
TEMPERATURE RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
ORDER CODE
74LVT373D
74LVT373DB
74LVT373PW
PIN DESCRIPTION
PIN NUMBER
1
3, 4, 7, 8, 13, 14, 17, 18
2, 5, 6, 9, 12, 15, 16, 19
11
10
20
SYMBOL
OE
D0-D7
Q0-Q7
E
GND
VCC
Output enable input (active-Low)
Data inputs
Data outputs
Enable input (active-High)
Ground (0V)
Positive supply voltage
FUNCTION
DRAWING NUMBER
0172D
1640B
TBD
July 1993
2


74LVT373D 데이터시트, 핀배열, 회로
Philips Semiconductors Low Voltage Products
3.3 Volt ABT octal transparent latch (3–State)
Objective specification
74LVT373
FUNCTION TABLE
INPUTS
OE E
Dn
INTERNAL
REGISTER
OUTPUTS
Q0 – Q7
OPERATING MODE
LH L
LH H
L
H
L
H
Enable and read register
L
i
Lh
L
H
L
H
Latch and read register
LL X
NC
NC Hold
HL
X
H H Dn
NC
Dn
Z
Z
Disable outputs
H=
h=
L=
l=
NC=
X=
Z=
=
High voltage level
High voltage level one set-up time prior to the High-to-Low E transition
Low voltage level
Low voltage level one set-up time prior to the High-to-Low E transition
No change
Don’t care
High impedance “off” state
High-to-Low E transition
LOGIC DIAGRAM
D0 D1 D2 D3 D4 D5 D6 D7
3 4 7 8 13 14 17 18
11
E
1
OE
D
EQ
D
EQ
D
EQ
D
EQ
D
EQ
D
EQ
D
EQ
D
EQ
2 5 6 9 12 15 16 19
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
July 1993
3




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74LVT373D latch

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