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PDF 74LCX646 Data sheet ( Hoja de datos )
| Número de pieza | 74LCX646 | |
| Descripción | CMOS OCTAL BUS TRANSCEIVER/REGISTER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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74LCX646
LOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER
WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE)
s 5V TOLERANT INPUTS AND OUTPUTS
s HIGH SPEED :
tPD = 7.0 ns (MAX.) at VCC = 3V
s POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN) at VCC = 3V
s PCI BUS LEVELS GUARANTEED AT 24 mA
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s OPERATING VOLTAGE RANGE:
VCC(OPR) = 2.0V to 3.6V (1.5V Data
Retention)
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 646
s LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
s ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LCX646 is a low voltage CMOS OCTAL
BUS TRANSCEIVER AND REGISTER
(3-STATE) fabricated with sub-micron silicon gate
and double-layer metal wiring C2MOS 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.
PIN CONNECTION AND IEC LOGIC SYMBOLS
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
SOP
TSSOP
74LCX646M1R
T&R
74LCX646RM13TR
74LCX646TTR
This device consists of bus transceiver circuits
with 3 state, D-type flip-flops, and control circuitry
arranged for multiplexed transmission of data
directly from the input bus or from the internal
registers. Data on the A or B bus will be clocked
into register on the low to high transition of the
appropriate clock pin (Clock AB or Clock BA).
Enable (G) and direction (DIR) pins are provided
to control the transceiver functions. In the
transceiver mode, data present at the
high-impedance port may be stored in either
register or in both. The select controls (Select AB
select BA) can multiplex stored and real time
(transparent mode) data. The direction control
determines which bus will receive data when
enable G is active (low). In the isolation mode
September 2001
1/13
1 page  
M74LCX646
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC Supply Voltage
-0.5 to +7.0
V
VI DC Input Voltage
-0.5 to +7.0
V
VO DC Output Voltage (OFF State)
-0.5 to +7.0
V
VO DC Output Voltage (High or Low State) (note 1)
-0.5 to VCC + 0.5
V
IIK DC Input Diode Current
- 50 mA
IOK DC Output Diode Current (note 2)
- 50 mA
IO DC Output Current
± 50
mA
ICC DC Supply Current per Supply Pin
± 100
mA
IGND DC Ground Current per Supply Pin
± 100
mA
Tstg Storage Temperature
-65 to +150
°C
TL Lead Temperature (10 sec)
300 °C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
1) IO absolute maximum rating must be observed
2) VO < GND
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VCC Supply Voltage (note 1)
VI Input Voltage
VO Output Voltage (OFF State)
VO Output Voltage (High or Low State)
IOH, IOL High or Low Level Output Current (VCC = 3.0 to 3.6V)
IOH, IOL High or Low Level Output Current (VCC = 2.7V)
Top Operating Temperature
dt/dv Input Rise and Fall Time (note 2)
1) Truth Table guaranteed: 1.5V to 3.6V
2) VIN from 0.8V to 2V at VCC = 3.0V
Value
2.0 to 3.6
0 to 5.5
0 to 5.5
0 to VCC
± 24
± 12
-55 to 125
0 to 10
Unit
V
V
V
V
mA
mA
°C
ns/V
5/13
5 Page 
DIM.
A
a1
a2
b
b1
C
c1
D
E
e
e3
F
L
S
MIN.
0.1
0.35
0.23
15.20
10.00
7.40
0.50
SO-24 MECHANICAL DATA
mm.
TYP
0.5
1.27
13.97
MAX.
2.65
0.2
2.45
0.49
0.32
MIN.
0.004
0.014
0.009
45° (typ.)
15.60
0.598
10.65
0.393
7.60 0.291
1.27 0.020
8° (max.)
L
M74LCX646
inch
TYP.
0.020
0.050
0.550
MAX.
0.104
0.008
0.096
0.019
0.012
0.614
0.419
0.300
0.050
c1
be
e3
D
24 13
s
E
1 12
PO13T
11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet 74LCX646.PDF ] | |
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