TC74LCX245F/FW/FT/FK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74LCX245F,TC74LCX245FW,TC74LCX245FT,TC74LCX245FK
Low-Voltage Octal Bus Transceiver with 5-V Tolerant Inputs and Outputs
The TC74LCX245F/FW/FT/FK is a high-performance CMOS
octal bus transceiver. Designed for use in 3.3-V systems, it
achieves high-speed operation while maintaining the CMOS low
power dissipation.
The device is designed for low-voltage (3.3 V) VCC applications,
but it could be used to interface to 5-V supply environment for
both inputs and outputs.
The direction of data transmission is determined by the level of
the DIR input. The enable input ( OE ) can be used to disable the
device so that the busses are effectively isolated.
All inputs are equipped with protection circuits against static
discharge.
Note: xxxFW (JEDEC SOP) is not available in
Japan.
TC74LCX245F
Features (Note)
•
Low-voltage operation: VCC = 2.0 to 3.6 V
•
High-speed operation: tpd = 7.0 ns (max) (VCC = 3.0 to 3.6 V)
•
Ouput current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V)
•
Latch-up performance: ±500 mA
•
Available in JEDEC SOP, JEITA SOP and TSSOP
•
Bidirectional interface between 5.0 V and 3.3 V signals
•
Power-down protection provided on all inputs and outputs
•
Pin and function compatible with the 74 series
TC74LCX245FW
(74AC/VHC/HC/F/ALS/LS etc.) 245 type
Note: Do not apply a signal to any bus pins when it is in the
output mode. Damage may result.
All floating (high impedance) bus pins must have their
input levels fixed by means of pull-up or pull-down
resistors.
TC74LCX245FT
TC74LCX245FK
Weight
SOP20-P-300-1.27A
SOP20-P-300-1.27
SOL20-P-300-1.27
TSSOP20-P-0044-0.65A
VSSOP20-P-0030-0.50
: 0.22g (typ.)
: 0.22g (typ.)
: 0.46 g (typ.)
: 0.08 g (typ.)
: 0.03 g (typ.)
1
2007-05-11
TC74LCX245F/FW/FT/FK
Absolute Maximum Ratings (Note 1)
Characteristics
Power supply voltage
Symbol
Rating
Unit
VCC
−0.5 to 7.0
V
VIN
−0.5 to 7.0
V
DC input voltage
(DIR, OE )
−0.5 to 7.0 (Note 2)
DC bus I/O voltage
VI/O
−0.5 to VCC + 0.5
V
(Note 3)
Input diode current
IIK
−50
Output diode current
IOK
±50
DC output current
IOUT
±50
mA
Power dissipation
PD
180
mW
ICC/IGND
±100
mA
Tstg
−65 to 150
°C
DC VCC/ground current
Storage temperature
mA
(Note 4)
mA
Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Note 2: Output in OFF state
Note 3: High or low state. IOUT absolute maximum rating must be observed.
Note 4: VOUT < GND, VOUT > VCC
Operating Range (Note 1)
Characteristics
Power supply voltage
Symbol
VCC
Input voltage
Rating
2.0 to 3.6
1.5 to 3.6 (Note 2)
0 to 5.5
VIN
(DIR, OE )
Bus I/O voltage
IOH/IOL
0 to VCC (Note 4)
±24
(Note 5)
±12
(Note 6)
Operating temperature
Topr
−40 to 85
Input rise and fall time
dt/dv
0 to 10
V
V
0 to 5.5 (Note 3)
VI/O
Output current
Unit
V
mA
°C
(Note 7)
ns/V
Note 1: The operating range is required to ensure the normal operation of the device. Unused inputs and bus inputs
must be tied to either VCC or GND. Please connect both bus inputs and the bus outputs with VCC or GND
when the I/O of the bus terminal changes by the function. In this case, please note that the output is not
short-circuited.
Note 2: Data retention only
Note 3: Output in OFF state
Note 4: High or low state
Note 5: VCC = 3.0 to 3.6 V
Note 6: VCC = 2.7 to 3.0 V
Note 7: VIN = 0.8 to 2.0 V, VCC = 3.0 V
3
2007-05-11
