SGS Thomson Microelectronics 74LCXR162245TTR Datasheet
1/10July 2003
■ 5V TOLERANT INPUTS AND OUTPUTS
■ HIGH SPEED:
t
PD
= 4.2 ns (MAX.) at VCC=3V
■ POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
|=IOL= 12mA (MIN) at VCC=3V
■ PCI BUS LEVELS GUARANTEED AT 12 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 > 2 000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LCXR162245 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 5Vsignalenvironmentfor both inputs
and outputs.
This IC is intended for two-way asynchro nous
communication between data buses; the direc tion
of data transm ission is determined by DIR input.
The t wo enable inputs nG
canbeusedtodisable
the device so that the buses are ef fectively isolated.
All outputs, wich are designed to sink up to 12mA,
include 26
Ω resistors to reduce overshoot and un-
dershoot.
All inputs and outputs are equipped with protection circuits against static discharge, giving them
2KV ESD immunity and tr ans ient excess voltage.
All floating bus terminals during High Z State must
be held HIGH or LOW.
74LCXR162245
LOW VOLTAGE CMOS 16-BIT BUS TRANSCEIVER
WITH 5V TOLERANT INPUTS AND OUTPUT (3-STATE)
ORDER CODES
PACKAGE TUBE T & R
TSSOP 74LCXR162245TTR
TSSOP
PIN CONNECTION
74LCXR162245
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X :Don‘t Care
Z : High Impedance
IEC L OGIC SYMBOLS
PIN No SYMBOL NAME AND FUNCTION
1 1DIR Directional Control
2, 3, 5, 6, 8, 9,
11, 12
1B1 to 1B8 Data Inputs/Outputs
13,14,16,17,
19, 20, 22, 23
2B1 to 2B8 Data Inputs/Outputs
24 2DIR Directional Control
25 2G
Output Enable Input
36,35,33,32,
30, 29, 27, 26
2A1 to 2A8 Data Inputs/Outputs
47,46,44,43,
41, 40, 38, 38
1A1 to 1A8 Data Inputs/Outputs
48 1G
Output Enable Input
4, 10, 15, 21,
28, 34, 39, 45
GND Ground (0V)
7, 18, 31, 42
V
CC
Positive Supply Voltage
INPUTS FUNCTION OUTPUT
G
DIR A BUS B BUS Yn
L L OUTPUT INPUT A = B
L H INPUT OUTPUT B = A
HXZZZ
74LCXR162245
3/10
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
1) I
O
absolute maximum rating must be observed
2) V
O
<GND
RECOMMENDED OPERATING CONDITIONS
1) Truth Table guaranteed: 1.5V to 3.6V
2) V
IN
from0.8V to2Vat VCC=3.0V
Symbol Parameter Value Unit
V
CC
Supply Voltage
-0.5 to +7.0 V
V
I
DC Input Voltage (DIR, G)
-0.5 to +7.0 V
V
I/O
Bus I/O Voltage (OFF State)
-0.5 to +7.0 V
V
I/O
Bus I/O Voltage (High or Low State) (note 1) -0.5 to VCC+ 0.5
V
I
IK
DC Input Diode Current
-50 mA
I
OK
DC Output Diode Current (note 2)
-50 mA
I
O
DC Output Current
± 50 mA
I
CC
DC Supply Current per Supply Pin
± 100 mA
I
GND
DC Ground Current per Supply Pin
± 100 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)
2.0 to 3.6 V
V
I
Input Voltage
0 to 5.5 V
V
O
Output Voltage (OFF State)
0 to 5.5 V
V
O
Output Voltage (High or Low State) 0 to V
CC
V
I
OH,IOL
High or Low Level Output Current (VCC= 3.0 to 3.6V)
± 12 mA
I
OH,IOL
High or Low Level Output Current (VCC= 2.7V)
± 8mA
T
op
Operating Temperature
-55 to 125 °C
dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V
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