SN74ALVCHR16601
18-BIT UNIVERSAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
www.ti.com
SCES123I–SEPTEMBER 1997–REVISED SEPTEMBER 2004
FEATURES
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
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Member of the Texas Instruments Widebus™
Family
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56
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OEAB
LEAB
A1
GND
A2
CLKENAB
CLKAB
B1
GND
B2
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UBT™ Transceiver Combines D-Type Latches
and D-Type Flip-Flops for Operation in
Transparent, Latched, or Clocked Modes
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3
4
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Operates From 1.65 V to 3.6 V
Max tpd of 4.4 ns at 3.3 V
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6
A3
B3
±12-mA Output Drive at 3.3 V
7
V
CC
V
CC
Outputs Ports Have Equivalent 26-Ω Series
Resistors, So No External Resistors Are
Required
8
A4
A5
A6
GND
A7
A8
B4
B5
B6
GND
B7
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Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
B8
Latch-Up Performance Exceeds 250 mA Per
JESD 17
A9
B9
A10
A11
A12
GND
A13
A14
A15
B10
B11
B12
GND
B13
B14
B15
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
DESCRIPTION/ORDERING INFORMATION
This 18-bit universal bus transceiver is designed for
1.65-V to 3.6-V VCC operation.
V
CC
V
CC
The SN74ALVCHR16601 combines D-type latches
and D-type flip-flops to allow data flow in transparent,
latched, clocked, and clock-enabled modes.
A16
A17
B16
B17
GND
A18
OEBA
LEBA
GND
B18
CLKBA
CLKENBA
Data flow in each direction is controlled by
output-enable (OEAB and OEBA), latch-enable
(LEAB and LEBA), and clock (CLKAB and CLKBA)
inputs. The clock can be controlled by the
clock-enable (CLKENAB and CLKENBA) inputs. For
A-to-B data flow, the device operates in the
transparent mode when LEAB is high. When LEAB is
low, the A data is latched if CLKAB is held at a high
or low logic level. If LEAB is low, the A data is stored
in the latch/flip-flop on the low-to-high transition of
CLKAB. When OEAB is low, the outputs are active.
When OEAB is high, the outputs are in the
high-impedance state.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
SN74ALVCHR16601DL
SN74ALVCHR16601LR
SN74ALVCHR16601GR
SN74ALVCHR16601VR
TOP-SIDE MARKING
Tube
SSOP - DL
ALVCHR16601
Tape and reel
Tape and reel
Tape and reel
-40°C to 85°C
TSSOP - DGG
TVSOP - DGV
ALVCHR16601
VR601
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
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.
Widebus, UBT are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 1997–2004, 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.