74lcx646 STMicroelectronics, 74lcx646 Datasheet

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74lcx646

Manufacturer Part Number
74lcx646
Description
Low Volt. Cmos Octal Bus Transceiver/register With 5 Volt Tolerant Inputs And Outputs 3-state
Manufacturer
STMicroelectronics
Datasheet

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DESCRIPTION
The 74LCX646 is a low voltage CMOS OCTAL
BUS
(3-STATE) fabricated with sub-micron silicon gate
and double-layer metal wiring C
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.
Figure 1: Pin Connection And IEC Logic Symbols
September 2004
WITH 5 VOLT TOLERANT INPUTS AND OUTPUTS(3-STATE)
5V TOLERANT INPUTS AND OUTPUTS
HIGH SPEED:
t
POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|I
PCI BUS LEVELS GUARANTEED AT 24 mA
BALANCED PROPAGATION DELAYS:
t
OPERATING VOLTAGE RANGE:
V
Retention)
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 646
LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
LOW VOLT. CMOS OCTAL BUS TRANSCEIVER/REGISTER
PD
PLH
OH
CC
= 7.0 ns (MAX.) at V
| = I
(OPR) = 2.0V to 3.6V (1.5V Data
TRANSCEIVER
t
PHL
OL
= 24mA (MIN) at V
CC
AND
= 3V
2
MOS technology.
CC
= 3V
REGISTER
Table 1: Order Codes
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
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
PACKAGE
TSSOP
SOP
SOP
mode,
data
74LCX646RM13TR
74LCX646TTR
74LCX646
Rev. 6
present
T & R
TSSOP
at
1/16
the

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74lcx646 Summary of contents

Page 1

... ESD PERFORMANCE: HBM > 2000V (MIL STD 883 method 3015); MM > 200V DESCRIPTION The 74LCX646 is a low voltage CMOS OCTAL BUS TRANSCEIVER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring ideal for low power and high speed 3.3V applications ...

Page 2

... M74LCX646 (enable G high), "A" data may be stored in one register and/or "B" data may be stored in the other register. When an output function is disabled, the input function is still enabled and may be used to store and transmit data. Only one of the two buses may be driven at a time. It has same speed performance at 3 ...

Page 3

... The data stored to the internal flip-flops are displayed the A bus L L The data at the B bus are stored to the internal flip-flop H on low to high transition of the clock pulse. The states the internal flip-flops output directly to the A bus. M74LCX646 FUNCTION 3/16 ...

Page 4

... M74LCX646 Figure 3: Logic Diagram This logic diagram has not be used to estimate propagation delays Figure 4: Timing Chart 4/16 ...

Page 5

... I High or Low Level Output Current ( Operating Temperature op dt/dv Input Rise and Fall Time (note 2) 1) Truth Table guaranteed: 1. from 0. 3. Parameter Parameter = 3.0 to 3.6V 2.7V) CC M74LCX646 Value Unit -0.5 to +7.0 V -0.5 to +7.0 V -0.5 to +7 100 mA 100 ...

Page 6

... M74LCX646 Table 6: DC Specifications Symbol Parameter V High Level Input IH Voltage V Low Level Input IL Voltage V High Level Output OH Voltage V Low Level Output OL Voltage I Input Leakage I Current I Power Off Leakage off Current I High Impedance OZ Output Leakage Current I Quiescent Supply CC Current I I incr. per Input ...

Page 7

... OSLH PLHm PLHn OSHL PHLm Test Condition 3 10MHz M74LCX646 Value - °C -55 to 125 °C Min. Max. Min. Max. 1.5 9.5 1.5 9.5 1.5 8.5 1.5 8.5 1.5 8.0 1.5 8.0 1.5 7.0 1.5 7.0 1.5 9.5 1.5 9.5 1.5 8.5 1.5 8.5 1.5 9.5 1.5 9.5 1.5 8.5 1.5 8.5 1.5 9.5 1.5 9.5 1.5 8.5 1.5 8.5 2.5 2.5 2.5 2.5 1 ...

Page 8

... M74LCX646 Figure 5: Test Circuit PLH PHL PZL PLZ PZH PHZ equivalent (includes jig and probe capacitance 500 or equivalent pulse generator (typically OUT Figure 6: Waveform - Propagation Delays, SAB, SBA, An, Bn, Times (f=1MHz; 50% duty cycle) ...

Page 9

... Figure 7: Waveform - Output Enable And Disable Time (f=1MHz; 50% duty cycle) Figure 8: Waveform - Setup And Hold Time, CAB, CBA Maximum Frequency (f=1MHz; 50% duty cycle) M74LCX646 9/16 ...

Page 10

... M74LCX646 Figure 9: Waveform - Pulse Width (f=1MHz; 50% duty cycle) 10/16 ...

Page 11

... MIN. A 2.35 A1 0.1 B 0.33 C 0.23 D 15. 10.00 h 0.25 L 0.4 k 0° ddd mm. TYP MAX. 2.65 0.093 0.30 0.004 0.51 0.013 0.32 0.009 15.60 0.598 7.6 0.291 1.27 10.65 0.394 0.75 0.010 1.27 0.016 8° 0.100 M74LCX646 inch MIN. TYP. 0.050 0° 0070769C MAX. 0.104 0.012 0.020 0.013 0.614 0.299 0.419 0.030 0.050 8° 0.004 11/16 ...

Page 12

... M74LCX646 DIM. MIN 0. 0.19 c 0.09 D 7 6.25 K 0° PIN 1 IDENTIFICATION 1 12/16 TSSOP24 MECHANICAL DATA mm. TYP MAX. 1.1 0.15 0.9 0.30 0.20 7.9 4.5 0.65 BSC 6.5 8° 0. inch MIN. TYP. 0.002 0.035 0.0075 0.0035 0.303 0.169 0.0256 BSC 0.246 0° 0.020 7047476B MAX. 0.043 0.006 ...

Page 13

... Tape & Reel SO-24 MECHANICAL DATA DIM. MIN 12 10.8 Bo 15.7 Ko 2.9 Po 3.9 P 11.9 mm. TYP MAX. 330 13.2 0.504 0.795 2.362 30.4 11.0 0.425 15.9 0.618 3.1 0.114 4.1 0.153 12.1 0.468 M74LCX646 inch MIN. TYP. MAX. 12.992 0.519 1.197 0.433 0.626 0.122 0.161 0.476 13/16 ...

Page 14

... M74LCX646 Tape & Reel TSSOP24 MECHANICAL DATA DIM. MIN 12 6.8 Bo 8.2 Ko 1.7 Po 3.9 P 11.9 14/16 mm. TYP MAX. 330 13.2 0.504 0.795 2.362 22.4 7 0.268 8.4 0.323 1.9 0.067 4.1 0.153 12.1 0.468 inch MIN. TYP. MAX. 12.992 0.519 0.882 0.276 0.331 0.075 0.161 0.476 ...

Page 15

... Table 10: Revision History Date Revision 15-Sep-2004 6 Description of Changes Ordering Codes Revision - pag. 1. M74LCX646 15/16 ...

Page 16

... M74LCX646 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...

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