SN74ALVCH16501
18-BIT UNIVERSAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
www.ti.com
SCES024J–JULY 1995–REVISED OCTOBER 2004
FEATURES
DGG OR DL PACKAGE
(TOP VIEW)
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Member of the Texas Instruments Widebus™
Family
1
56
55
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48
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OEAB
LEAB
A1
GND
A2
GND
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
2
3
4
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Operates From 1.65 V to 3.6 V
Max tpd of 3.9 ns at 3.3 V
5
6
A3
B3
±24-mA Output Drive at 3.3 V
7
V
CC
V
CC
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
8
A4
A5
A6
GND
A7
A8
B4
B5
B6
GND
B7
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10
11
12
13
14
15
16
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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)
B8
A9
B9
A10
A11
A12
GND
A13
A14
A15
B10
B11
B12
GND
B13
B14
B15
DESCRIPTION/ORDERING INFORMATION
This 18-bit universal bus transceiver is designed for
1.65-V to 3.6-V VCC operation.
Data flow in each direction is controlled by
output-enable (OEAB and OEBA), latch-enable
(LEAB and LEBA), and clock (CLKAB and CLKBA)
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 high, the outputs
are active. When OEAB is low, the outputs are in the
high-impedance state.
V
CC
V
CC
A16
A17
B16
B17
GND
A18
OEBA
LEBA
GND
B18
CLKBA
GND
Data flow for B to A is similar to that of A to B, but uses OEBA, LEBA, and CLKBA. The output enables are
complementary (OEAB is active high, and OEBA is active low).
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
SN74ALVCH16501DL
TOP-SIDE MARKING
ALVCH16501
ALVCH16501
VH501
Tube
SSOP - DL
Tape and reel
Tape and reel
SN74ALVCH16501DLR
SN74ALVCH16501DGGR
SN74ALVCH16501KR
-40°C to 85°C
TSSOP - DGG
VFBGA - GQL
Tape and reel
VFBGA - ZQL (Pb-free)
74ALVCH16501ZQLR
(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 © 1995–2004, 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.