74LCX16646MTD Datasheet PDF - Fairchild Semiconductor
| Part Number | 74LCX16646MTD | |
| Description | Low Voltage 16-Bit Transceiver/Register with 5V Tolerant Inputs and Outputs | |
| Manufacturers | Fairchild Semiconductor | |
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February 1994
Revised April 1999
74LCX16646
Low Voltage 16-Bit Transceiver/Register with 5V Tolerant
Inputs and Outputs
General Description
The LCX16646 contains sixteen non-inverting bidirectional
registered bus transceivers with 3-STATE outputs, provid-
ing multiplexed transmission of data directly from the input
bus or from the internal storage registers. Each byte has
separate control inputs which can be shorted together for
full 16-bit operation.The DIR inputs determine the direction
of data flow through the device. The CPAB and CPBA
inputs load data into the registers on the LOW-to-HIGH
transition (see Functional Description).
The LCX16646 is designed for low voltage (2.5V or 3.3V)
VCC applications with capability of interfacing to a 5V signal
environment.
The LCX16646 is fabricated with an advanced CMOS tech-
nology to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
s 5V tolerant inputs and outputs
s 2.3V–3.6V VCC specifications provided
s 5.2 ns tPD max (VCC = 3.3V), 20 µA ICC max
s Power down high impedance inputs and outputs
s Supports live insertion/withdrawal (Note 1)
s ±24 mA Output Drive (VCC = 3.0V)
s Implements patented noise/EMI reduction circuitry
s Latch-up performance exceeds 500 mA
s ESD performance:
Human Body Model > 2000V
Machine Model > 200V
Note 1: To ensure the high-impedance state during power up or down, OE
should be tied to VCC through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number Package Number
Package Description
74LCX16646MEA
MS56A
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74LCX16646MTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Pin Names
An
Bn
OEn
CPABn, CPBAn
SABn, SBAn
DIRn
Description
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
Output Enable Inputs
Clock Pulse Inputs
Select Inputs
Direction Control Inputs
© 1999 Fairchild Semiconductor Corporation DS012004.prf
www.fairchildsemi.com
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Absolute Maximum Ratings(Note 3)
Symbol
Parameter
VCC Supply Voltage
VI DC Input Voltage
VO DC Output Voltage
IIK DC Input Diode Current
IOK DC Output Diode Current
IO
ICC
IGND
TSTG
DC Output Source/Sink Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Value
−0.5 to +7.0
−0.5 to +7.0
−0.5 to +7.0
−0.5 to VCC + 0.5
−50
−50
+50
±50
±100
±100
−65 to +150
Conditions
Output in 3-STATE
Output in HIGH or LOW State (Note 4)
VI < GND
VO < GND
VO > VCC
Recommended Operating Conditions (Note 5)
Units
V
V
V
mA
mA
mA
mA
mA
°C
Symbol
Parameter
Min Max Units
VCC Supply Voltage
Operating
Data Retention
2.0
1.5
3.6
3.6
V
VI Input Voltage
VO Output Voltage
HIGH or LOW State
3-STATE
0
0
0
5.5
VCC
5.5
V
V
IOH/IOL Output Current
VCC = 3.0V − 3.6V
±24
VCC = 2.7V − 3.0V
±12 mA
VCC = 2.3V − 2.7V
±8
TA Free-Air Operating Temperature
−40 85
°C
∆t/∆V
Input Edge Rate, VIN = 0.8V–2.0V, VCC = 3.0V
0 10 ns/V
Note 3: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated
at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recom-
mended Operating Conditions” table will define the conditions for actual device operation.
Note 4: IO Absolute Maximum Rating must be observed.
Note 5: Unused inputs and I/Os must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
Parameter
VIH HIGH Level Input Voltage
VIL LOW Level Input Voltage
VOH HIGH Level Output Voltage
VOL LOW Level Output Voltage
II Input Leakage Current
IOZ 3-STATE I/O Leakage
IOFF Power-Off Leakage Current
Conditions
IOH = −100 µA
IOH = −8 mA
IOH = −12 mA
IOH = −18 mA
IOH = −24 mA
IOL = 100 µA
IOL = 8 mA
IOL = 12 mA
IOL = 16 mA
IOL = 24 mA
0 ≤ VI ≤ 5.5V
0 ≤ VO ≤ 5.5V
VI = VIH or VIL
VI or VO = 5.5V
VCC
(V)
2.3 − 2.7
2.7 − 3.6
2.3 − 2.7
2.7 − 3.6
2.3 − 3.6
2.3
2.7
3.0
3.0
2.3 − 3.6
2.3
2.7
3.0
3.0
2.3 − 3.6
2.3 − 3.6
TA = −40°C to +85°C
Min Max
1.7
2.0
0.7
0.8
VCC − 0.2
1.8
2.2
2.4
2.2
0.2
0.6
0.4
0.4
0.55
±5.0
±5.0
0 10
Units
V
V
V
V
µA
µA
µA
5 www.fairchildsemi.com
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| 74LCX16646MTD | The function is Low Voltage 16-Bit Transceiver/Register with 5V Tolerant Inputs and Outputs. Fairchild Semiconductor | |
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