74LVT245B 查看數據表（PDF） - Philips Electronics
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74LVT245B Datasheet PDF : 10 Pages
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Philips Semiconductors
3.3V Octal transceiver with direction pin (3-State)
Product specification
74LVT245B
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
VCC
VI
VIH
VIL
IOH
IOL
Dt/Dv
Tamb
DC supply voltage
Input voltage
High-level input voltage
Input voltage
High-level output current
Low-level output current
Low-level output current; current duty cycle ≤ 50%; f ≥ 1kHz
Input transition rise or fall rate; Outputs enabled
Operating free-air temperature range
LIMITS
MIN
MAX
2.7
3.6
0
5.5
2.0
0.8
–32
32
64
10
–40
+85
UNIT
V
V
V
V
mA
mA
ns/V
°C
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Temp = -40°C to +85°C UNIT
MIN
TYP1 MAX
VIK
Input clamp voltage
VCC = 2.7V; IIK = –18mA
–0.9 –1.2
V
VCC = 2.7 to 3.6V; IOH = –100µA
VCC-0.2 VCC-0.1
VOH High-level output voltage
VCC = 2.7V; IOH = –8mA
2.4
2.5
V
VCC = 3.0V; IOH = –32mA
2.0
2.2
VCC = 2.7V; IOL = 100µA
0.1
0.2
VCC = 2.7V; IOL = 24mA
0.3
0.5
VOL
Low-level output voltage
VCC = 3.0V; IOL = 16mA
0.25
0.4
V
VCC = 3.0V; IOL = 32mA
0.3
0.5
VCC = 3.0V; IOL = 64mA
0.4
0.55
VCC = 0 or 3.6V; VI = 5.5V
VCC = 3.6V; VI = VCC or GND
Control pins
1
10
±0.1
±1
II
Input leakage current
VCC = 3.6V; VI = 5.5V
VCC = 3.6V; VI = VCC
I/O Data pins4
1
20
µA
0.1
1
VCC = 3.6V; VI = 0
–1
-5
IOFF
Output off current
VCC = 0V; VI or VO = 0 to 4.5V
1
±100 µA
IHOLD Bus Hold current A inputs5
VCC = 3V; VI = 0.8V
VCC = 3V; VI = 2.0V
75
150
–75
–150
µA
VCC = 0V to 3.6V; VCC = 3.6V
±500
IEX
Current into an ouptut in the
High state when VO > VCC
VO = 5.5V; VCC = 3.0V
60
125 µA
IPU/PD
Power up/down 3-State
output current3
VCC ≤ 1.2V; VO = 0.5V to VCC; VI = GND or VCC;
OE/OE = Don’t care
15
±100 µA
ICCH
VCC = 3.6V; Outputs High, VI = GND or VCC, IO = 0
0.13 0.19
ICCL Quiescent supply current
VCC = 3.6V; Outputs Low, VI = GND or VCC, IO = 0
3
12
mA
ICCZ
VCC = 3.6V; Outputs Disabled; VI = GND or VCC, IO = 0
0.13 0.19
∆ICC
Additional supply current per VCC = 3V to 3.6V; One input at VCC-0.6V,
input pin2
Other inputs at VCC or GND
0.1
0.2 mA
NOTES:
1. All typical values are at VCC = 3.3V and Tamb = 25°C.
2. This is the increase in supply current for each input at the specified voltage level other than VCC or GND
3. This parameter is valid for any VCC between 0V and 1.2V with a transition time of up to 10msec. From VCC = 1.2V to VCC = 3.3V ± 0.3V a
transition time of 100µsec is permitted. This parameter is valid for Tamb = +25°C only.
4. Unused pins at VCC or GND.
5. This is the bus hold overdrive current required to force the input to the opposite logic state.
1999 Mar 19
4
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