OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

74LVQ245TTR

P1-P3P4-P6P7-P9P10-P12
1/12July 2004
■ HIGH SPEED:
t
PD
= 5.7 ns (TYP.) at V
CC
= 3.3 V
■ COMPATIBLE WITH TTL OUTPUTS
■ LOW POWER DISSIPATION:
I
CC
= 5 µA (MAX.) at T
A
=25°C
■ LOW NOISE:
V
OLP
= 0.5V (TYP.) at V
CC
= 3.3V
■ 75Ω TRANSMISSION LINE DRIVING
CAPABILITY
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 12mA (MIN) at V
CC
= 3.0 V
■ PCI BUS LEVELS GUARANTEED AT 24 mA
■ BALANCED PROPAGATION DELAYS:
t
PLH
≅ t
PHL
■ OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 3.6V (1.2V Data Retention)
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 245
■ IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74LVQ245 is a low voltage CMOS OCTAL
BUS TRANSCEIVER (3-STATE fabricated with
sub-micron silicon gate and double-layer metal
wiring C
2
MOS technology. It is ideal for low power
and low noise 3.3V applications.
This IC is intended for two-way asynchronous
communication between data buses and the
direction of data transmission is determined by
DIR input. The enable input G
can be used to
disable the device so that the buses are effectively
isolated.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
All floating bus terminals during High Impedance
State must be held HIGH or LOW.
74LVQ245
LOW VOLTAGE CMOS OCTAL BUS
TRANSCEIVER WITH (3-STATE)
Figure 1: Pin Connection And IEC Logic Symbols
Table 1: Order Codes
PACKAGE T & R
SOP 74LVQ245MTR
TSSOP 74LVQ245TTR
TSSOPSOP
Rev. 5
74LVQ245
2/12
Figure 2: Input Equivalent Circuit Table 2: Pin Description
Table 3: Truth Table
X : Don‘t Care
Z : High Impedance
Table 4: Absolute Maximum Ratings
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
Table 5: Recommended Operating Conditions
1) Truth Table guaranteed: 1.2V to 3.6V
2) V
IN
from 0.8V to 2V
PIN N° SYMBOL NAME AND FUNCTION
1 DIR Directional Control
2, 3, 4, 5, 6,
7, 8,9
A1 to A8 Data Inputs/Outputs
18, 17, 16,
15, 14, 13,
12, 11
B1 to B8 Data Inputs/Outputs
19 G
Output Enable Input
10 GND Ground (0V)
20 V
CC
Positive Supply Voltage
INPUTS FUNCTION
OUTPUT
G
DIR A BUS B BUS
L L OUTPUT INPUT A = B
L H INPUT OUTPUT B = A
HXZZZ
Symbol Parameter Value Unit
V
CC
Supply Voltage
-0.5 to +7 V
V
I
DC Bus I/O Voltage (DIR, G) -0.5 to V
CC
+ 0.5
V
V
I/O
DC Bus I/O Voltage -0.5 to V
CC
+ 0.5
V
I
IK
DC Input Diode Current
± 20 mA
I
OK
DC Output Diode Current
± 20 mA
I
O
DC Output Current
± 50 mA
I
CC
or I
GND
DC V
CC
or Ground Current
± 400 mA
T
stg
Storage Temperature
-65 to +150 °C
T
L
Lead Temperature (10 sec)
300 °C
Symbol Parameter Value Unit
V
CC
Supply Voltage (note 1)
2 to 3.6 V
V
I
Input Voltage (DIR, G) 0 to V
CC
V
V
O
DC Bus I/O Voltage 0 to V
CC
V
T
op
Operating Temperature
-55 to 125 °C
dt/dv
Input Rise and Fall Time V
CC
= 3.0V (note 2)
0 to 10 ns/V
74LVQ245
3/12
Table 6: DC Specifications
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 75Ω
Table 7: Dynamic Switching Characteristics
1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (V
ILD
), 0V to threshold
(V
IHD
), f=1MHz.
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
T
A
= 25°C
-40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
V
IH
High Level Input
Voltage
3.0 to
3.6
2.0 2.0 2.0 V
V
IL
Low Level Input
Voltage
0.8 0.8 0.8 V
V
OH
High Level Output
Voltage
3.0
I
O
=-50 µA
2.9 2.99 2.9 2.9
V
I
O
=-12 mA
2.58 2.48 2.48
I
O
=-24 mA
2.2 2.2
V
OL
Low Level Output
Voltage
3.0
I
O
=50 µA
0.002 0.1 0.1 0.1
V
I
O
=12 mA
0 0.36 0.44 0.44
I
O
=24 mA
0.55 0.55
I
I
Input Leakage
Current
3.6
V
I
= V
CC
or GND
± 0.1 ± 1 ± 1 µA
I
OZ
High Impedance
Output Leakage
Current
3.6
V
I
= V
IH
or V
IL
V
O
= V
CC
or GND
± 0.3 ± 3 ± 10 µA
I
CC
Quiescent Supply
Current
3.6
V
I
= V
CC
or GND
44040µA
I
OLD
Dynamic Output
Current (note 1, 2)
3.6
V
OLD
= 0.8 V max
36 25 mA
I
OHD
V
OHD
= 2 V min
-25 -25 mA
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
T
A
= 25°C
-40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
V
OLP
Dynamic Low
Voltage Quiet
Output (note 1, 2)
3.3
C
L
= 50 pF
0.5 0.8
V
V
OLV
-0.8 -0.5
V
IHD
Dynamic High
Voltage Input
(note 1, 3)
3.3 2 V
V
ILD
Dynamic Low
Voltage Input
(note 1, 3)
3.3 0.8 V
P1-P3P4-P6P7-P9P10-P12

74LVQ245TTR

Mfr. #:
Buy 74LVQ245TTR
Manufacturer:
STMicroelectronics
Description:
IC TXRX NON-INVERT 3.6V 20TSSOP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet