IDT74FCT164245T
FASTCMOS16-BITBIDIRECTIONAL3.3VTO5VTRANSLATOR
INDUSTRIALTEMPERATURERANGE
FAST CMOS 16-BIT
BIDIRECTIONAL
IDT74FCT164245T
3.3V TO 5V TRANSLATOR
FEATURES:
DESCRIPTION:
ꢀ 0.5 MICRON CMOS Technology
The FCT164245T 16-bit 3.3V-to-5V translator is built using advanced
dual metal CMOS technology. This high-speed, low-power transceiver is
designed to interface between a 3.3V bus and a 5V bus in a mixed 3.3V/
5V supply environment. This enables system designers to interface TTL
compatible3.3Vcomponentswith5Vcomponents. Thedirectionandoutput
enable controls operate these devices as either two independent 8-bit
transceivers or one 16-bit transceiver. The A port interfaces with the 3.3V
bus; theBportinterfaceswiththe5Vbus. Thedirectioncontrol(xDIR)pin
controls the direction of data flow. The output enable pin (xOE) overrides
the direction control and disables both ports. These control signals can be
driven from either 3.3V or 5V devices.
ꢀ Bidirectional interface between 3.3V and 5V buses
ꢀ Control inputs can be driven from either 3.3V or 5V circuits
ꢀ ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
ꢀ VCC1 = 5V 10%, VCC2 = 2.7V to 3.6V
ꢀ High drive outputs (-32mA IOH, 64mA IOL) on 5V port
ꢀ Power off disable on both ports permits “live insertion”
ꢀ Typical VOLP (Output Ground Bounce) < 0.9V at VCC1 = 5V,
VCC2 = 3.3V, TA = 25°C
ꢀ Available in SSOP and TSSOP packages
The FCT164245T is ideally suited for driving high-capacitance loads
and low-impedance backplanes. The output buffers are designed with
poweroffdisablecapabilitytoallow"hotinsertion"ofboardswhenusedas
backplane drivers. They also allow interface between a mixed supply
system and external 5 volt peripherals.
FUNCTIONALBLOCKDIAGRAM
1
24
1
DIR
2 DIR
48
2
25
13
14
1
1
1
1
1
OE
2
2
2
2
2
OE
47
46
36
35
1
1
A
1
2
2
A
A
1
2
B1
B2
B3
B4
B1
B2
B3
B4
A
2
3
5
44
43
41
40
38
37
33
32
30
29
27
26
1
1
1
1
A3
A4
A5
A6
2A
2A
2A
2A
3
4
5
6
16
17
19
20
6
8
1
1
B
5
6
2
2
B
5
6
9
B
B
1
1
A
7
8
2
A
A
7
8
11
12
22
23
1
1
B
7
8
2
2
B
7
8
A
2
B
B
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INDUSTRIAL TEMPERATURE RANGE
MAY 2016
1
© 2016 Integrated Device Technology, Inc.
DSC-2555/11