CY74FCT2245T_16 Datasheet, PDF (1/18 Pages) Texas Instruments – 8-BIT TRANSCEIVER WITH 3-STATE OUTPUTS

D Function and Pinout Compatible With FCT
and F Logic
D 25-Ω Output Series Resistors to Reduce
Transmission-Line Reflection Noise
D Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D I_off Supports Partial-Power-Down Mode
Operation
D Fully Compatible With TTL Input and
Output Logic Levels
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
D 12-mA Output Sink Current
15-mA Output Source Current
D 3-State Outputs
CY74FCT2245T
8-BIT TRANSCEIVER
WITH 3-STATE OUTPUTS
SCCS037B – JULY 1994 – REVISED NOVEMBER 2001
P, Q, OR SO PACKAGE
(TOP VIEW)
T/R 1
A₀ 2
A₁ 3
A₂ 4
A₃ 5
A₄ 6
A₅ 7
A₆ 8
A₇ 9
GND ¹⁰
20 V_CC
19 OE
18 B₀
17 B₁
16 B₂
15 B₃
14 B₄
13 B₅
12 B₆
11 _B7
description
The CY74FCT2245T contains eight noninverting, bidirectional buffers with 3-state outputs intended for
bus-oriented applications. On-chip termination resistors at the outputs reduce system noise caused by
reflections. For this reason, the CY74FCT2245T can replace the CY74FCT245T in an existing design. The
CY74FCT2245T current-sinking capability is 12 mA at the A and B ports.
The transmit/receive (T/R) input determines the direction of data flow through the bidirectional transceiver.
Transmit (active high) enables data from A ports to B ports; receive (active low) enables data from B ports to
A ports. The output-enable (OE) input, when high, disables both the A and B ports by putting them in the
high-impedance state.
This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
TA
PACKAGE†
SPEED
(ns)
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
QSOP – Q Tape and reel
4.1
CY74FCT2245CTQCT
FCT2245
Tube
4.1
CY74FCT2245CTSOC
SOIC – SO
FCT2245
Tape and reel
4.1
CY74FCT2245CTSOCT
DIP – P
Tube
4.6
CY74FCT2245ATPC
74FCT2245ATPC
QSOP – Q Tape and reel
4.6
CY74FCT2245ATQCT
FCT2245A
–40°C to 85°C
Tube
4.6
CY74FCT2245ATSOC
SOIC – SO
FCT2245A
Tape and reel
4.6
CY74FCT2245ATSOCT
QSOP – Q Tape and reel
7.0
CY74FCT2245TQCT
FCT2245
Tube
7.0
CY74FCT2245TSOC
SOIC – SO
FCT2245
Tape and reel
7.0
CY74FCT2245TSOCT
† _{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.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2001, Texas Instruments Incorporated
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