TI-SN54LVC646A-SP.pdf
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1
FEATURES
CLKAB
SAB
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
CLKBA
SBA
OE
B1
B2
B3
B4
B5
B6
B7
B8
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
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WPACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
SN54LVC646A-SP
www.ti.com
............................................................................................................................................................................................. SCAS865 – OCTOBER 2008
RAD-TOLERANT CLASS V OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
• Operates From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Max t
pd
of 7.4 ns at 3.3 V
• Typical V
OLP
(Output Ground Bounce)
< 0.8 at V
CC
= 3.3 V, T
A
= 25 ° C
• Typical V
OHV
(Output V
OH
Undershoot)
>2 V at V
CC
= 3.3 V, T
A
= 25 ° C
• Supports Mixed-Mode Signal Operation on All
Ports (5-V Input/Output Voltage With
3.3-V V
CC
)
• I
off
Supports Partial Power-Down-Mode
Operation
• Latch-Up Performance Exceeds 250 mA Per
JESD 17
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
• Rad Tolerant: 50kRad (Si) TID
(1)
– TID Dose Rate 0.10 rad/s
• QML-V Qualified, SMD 5962-97626
(1) Radiation tolerance is a typical value based upon initial device
qualification. Radiation Lot Acceptance Testing is available –
contact factory for details.
The SN54LVC646A octal bus transceiver and register is designed for 2.7-V to 3.6-V V
CC
operation.
This device consists of bus-transceiver circuits, 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 is clocked
into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 shows
the four fundamental bus-management functions that are performed with the SN54LVC646A device.
ORDERING INFORMATION
T
A
PACKAGE
(1) (2)
ORDERABLE PART NUMBER TOP-SIDE MARKING
– 55 ° C to 125 ° C CFP – W Tube of 85 5962-9762601VKA 5962-9762601VKA
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com .
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging .
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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