74LCX16245
LOW VOLTAGE CMOS 16-BIT BUS TRANSCEIVER
WITH 5V TOLERANT INPUTS AND OUTPUT (3-STATE)
s
s
s
s
s
s
s
s
s
s
5V TOLERANT INPUTS AND OUTPUTS
HIGH SPEED:
t
PD
= 4.5 ns (MAX.) at V
CC
= 3V
POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN) at V
CC
= 3V
PCI BUS LEVELS GUARANTEED AT 24 mA
BALANCED PROPAGATION DELAYS:
t
PLH
≅
t
PHL
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2.0V to 3.6V (1.5V Data
Retention)
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 16245
LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
TSSOP
ORDER CODES
PACKAGE
TSSOP
TUBE
T&R
74LCX16245TTR
PIN CONNECTION
DESCRIPTION
The 74LCX16245 is a low voltage CMOS 16 BIT
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 high speed 3.3V applications; it can be
interfaced to 5V signal environment for both inputs
and outputs.
This IC is intended for two-way asynchronous
communication between data buses; the direction
of data transmission is determined by DIR input.
The two enable inputs nG can be used to disable
the device so that the buses are effectively isolat-
ed.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power con-
sumption.
All inputs and outputs are equipped with protec-
tion circuits against static discharge, giving them
2KV ESD immunity and transient excess voltage.
All floating bus terminals during High Z State must
be held HIGH or LOW.
July 2003
1/10
74LCX16245
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2, 3, 5, 6, 8, 9,
11, 12
13, 14, 16, 17,
19, 20, 22, 23
24
25
36, 35, 33, 32,
30, 29, 27, 26
47, 46, 44, 43,
41, 40, 38, 38
48
4, 10, 15, 21,
28, 34, 39, 45
7, 18, 31, 42
SYMBOL
NAME AND FUNCTION
IEC LOGIC SYMBOLS
1DIR
Directional Control
1B1 to 1B8 Data Inputs/Outputs
2B1 to 2B8 Data Inputs/Outputs
2DIR
Directional Control
2G
Output Enable Input
2A1 to 2A8 Data Inputs/Outputs
1A1 to 1A8 Data Inputs/Outputs
1G
GND
V
CC
Output Enable Input
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
G
L
L
H
DIR
L
H
X
FUNCTION
A BUS
B BUS
OUTPUT
Yn
A=B
B=A
Z
OUTPUT
INPUT
INPUT
OUTPUT
Z
Z
X : Don‘t Care
Z : High Impedance
2/10
74LCX16245
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
I/O
V
I/O
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
T
L
Supply Voltage
DC Input Voltage (DIR, G)
Bus I/O Voltage (OFF State)
Bus I/O Voltage (High or Low State) (note 1)
DC Input Diode Current
DC Output Diode Current (note 2)
DC Output Current
DC Supply Current per Supply Pin
DC Ground Current per Supply Pin
Storage Temperature
Lead Temperature (10 sec)
Parameter
Value
-0.5 to +7.0
-0.5 to +7.0
-0.5 to +7.0
-0.5 to V
CC
+ 0.5
- 50
- 50
±
50
±
100
±
100
-65 to +150
300
Unit
V
V
V
V
mA
mA
mA
mA
mA
°C
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
1) I
O
absolute maximum rating must be observed
2) V
O
< GND
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
V
O
I
OH
, I
OL
I
OH
, I
OL
T
op
dt/dv
Supply Voltage (note 1)
Input Voltage
Output Voltage (OFF State)
Output Voltage (High or Low State)
High or Low Level Output Current (V
CC
= 3.0 to 3.6V)
High or Low Level Output Current (V
CC
= 2.7V)
Operating Temperature
Input Rise and Fall Time (note 2)
Parameter
Value
2.0 to 3.6
0 to 5.5
0 to 5.5
0 to V
CC
±
24
±
12
-55 to 125
0 to 10
Unit
V
V
V
V
mA
mA
°C
ns/V
1) Truth Table guaranteed: 1.5V to 3.6V
2) V
IN
from 0.8V to 2V at V
CC
= 3.0V
3/10
74LCX16245
DC SPECIFICATIONS
Test Condition
Symbol
Parameter
V
CC
(V)
-40 to 85 °C
Min.
2.0
2.7 to 3.6
0.8
2.7 to 3.6
2.7
3.0
V
OL
Low Level Output
Voltage
2.7 to 3.6
2.7
3.0
I
I
I
off
I
OZ
Input Leakage
Current
Power Off Leakage
Current
High Impedance
Output Leakage
Current
Quiescent Supply
Current
I
CC
incr. per Input
2.7 to 3.6
0
2.7 to 3.6
I
O
=-100
µA
I
O
=-12 mA
I
O
=-18 mA
I
O
=-24 mA
I
O
=100
µA
I
O
=12 mA
I
O
=16 mA
I
O
=24 mA
V
I
= 0 to 5.5V
V
I
or V
O
= 5.5V
V
I
= V
IH
or V
IL
V
O
= 0 to V
CC
V
I
= V
CC
or GND
V
CC
-0.2
2.2
2.4
2.2
0.2
0.4
0.4
0.55
±
5
10
±
5
20
±
20
500
V
CC
-0.2
2.2
2.4
2.2
0.2
0.4
0.4
0.55
±
5
10
±
5
20
±
20
500
µA
µA
µA
µA
µA
V
V
0.8
V
Max.
Value
-55 to 125 °C
Min.
2.0
Max.
V
Unit
V
IH
V
IL
V
OH
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
I
CC
∆I
CC
V
I
or V
O
= 3.6 to 5.5V
V
IH
= V
CC
- 0.6V
2.7 to 3.6
2.7 to 3.6
DYNAMIC SWITCHING CHARACTERISTICS
Test Condition
Symbol
Parameter
V
CC
(V)
3.3
C
L
= 50pF
V
IL
= 0V, V
IH
= 3.3V
Value
T
A
= 25 °C
Min.
Typ.
0.8
-0.8
Max.
V
Unit
V
OLP
V
OLV
Dynamic Low Level Quiet
Output (note 1)
1) Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is
measured in the LOW state.
4/10
74LCX16245
AC ELECTRICAL CHARACTERISTICS
Test Condition
Symbol
Parameter
V
CC
(V)
2.7
3.0 to 3.6
2.7
3.0 to 3.6
2.7
3.0 to 3.6
3.0 to 3.6
C
L
(pF)
50
50
50
50
R
L
(Ω)
500
500
500
500
t
s
=
t
r
(ns)
2.5
2.5
2.5
2.5
-40 to 85 °C
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
5.2
4.5
7.2
6.5
6.9
6.4
1.0
Value
-55 to 125 °C
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
5.2
4.5
7.2
6.5
6.9
6.4
1.0
ns
ns
ns
ns
Unit
t
PLH
t
PHL
t
PZL
t
PZH
t
PLZ
t
PHZ
t
OSLH
t
OSHL
Propagation Delay
Time
Output Enable Time
Output Disable Time
Output To Output
Skew Time (note1,
2)
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW (t
OSLH
= | t
PLHm
- t
PLHn
|, t
OSHL
= | t
PHLm
- t
PHLn
|)
2) Parameter guaranteed by design
CAPACITIVE CHARACTERISTICS
Test Condition
Symbol
Parameter
V
CC
(V)
3.3
3.3
3.3
V
IN
= 0 to V
CC
V
IN
= 0 to V
CC
f
IN
= 10MHz
V
IN
= 0 or V
CC
Value
T
A
= 25 °C
Min.
Typ.
7
8
20
Max.
pF
pF
pF
Unit
C
IN
C
OUT
C
PD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
(note 1)
1) C
PD
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
/16 (per
circuit)
5/10
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