SN74LVCH16T245
16-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
www.ti.com
SCES635A–JULY 2005–REVISED AUGUST 2005
FEATURES
DGG OR DGV PACKAGE
•
Control Inputs VIH/VIL Levels Are Referenced
(TOP VIEW)
to VCCA Voltage
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
•
VCC Isolation Feature – If Either VCC Input Is at
GND, All Outputs Are in the High-Impedance
State
1DIR
1B1
1B2
GND
1B3
1B4
1OE
1A1
1A2
GND
1A3
1A4
2
3
4
•
•
Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
5
6
Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.65-V to
5.5-V Power-Supply Range
7
V
CCB
V
CCA
8
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
9
•
•
•
•
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Ioff Supports Partial-Power-Down Mode
Operation
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
V
CCB
V
CCA
2B5
2B6
GND
2B7
2B8
2DIR
2A5
2A6
GND
2A7
2A8
2OE
– 1000-V Charged-Device Model (C101)
DESCRIPTION/ORDERING INFORMATION
This 16-bit noninverting bus transceiver uses two
separate configurable power-supply rails. The A port
is designed to track VCCA. VCCA accepts any supply
voltage from 1.65 V to 5.5 V. The B port is designed
to track VCCB. VCCB accepts any supply voltage from
1.65 V to 5.5 V. This allows for universal low-voltage
bidirectional translation between any of the 1.8-V,
2.5-V, 3.3-V, and 5-V voltage nodes.
The SN74LVCH16T245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA
.
The SN74LVCH16T245 is designed for asynchronous communication between two data buses. The logic levels
of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the
A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A
bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs
are activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW
level applied to prevent excess ICC and ICCZ
.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
LVCH16T245
LDHT245
TSSOP – DGG
Tape and reel
Tape and reel
Tape and reel
Tape and reel
SN74LVCH16T245DGGR
SN74LVCH16T245DGVR
SN74LVCH16T245GQLR
SN74LVCH16T245ZQLR
TVSOP – DGV
–40°C to 85°C
VFBGA – GQL
LDHT245
VFBGA – ZQL (Pb-free)
(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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005, 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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