1-OF-8 DECODERS. CY54FCT138T Datasheet

CY54FCT138T DECODERS. Datasheet pdf. Equivalent

Part CY54FCT138T
Description 1-OF-8 DECODERS
Feature CY54FCT138T, CY74FCT138T 1-OF-8 DECODERS D Function, Pinout, and Drive Compatible With FCT and F Lo.
Manufacture etcTI
Datasheet
Download CY54FCT138T Datasheet



CY54FCT138T
CY54FCT138T, CY74FCT138T
1-OF-8 DECODERS
D Function, Pinout, and Drive Compatible
With FCT and F Logic
D Reduced VOH (Typically = 3.3 V) Versions of
Equivalent FCT Functions
D Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D Ioff Supports Partial-Power-Down Mode
Operation
D Matched Rise and Fall Times
D Fully Compatible With TTL Input and
Output Logic Levels
D Dual 1-of-8 Decoder With Enables
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 CY54FCT138T
– 32-mA Output Sink Current
– 12-mA Output Source Current
D CY74FCT138T
– 64-mA Output Sink Current
– 32-mA Output Source Current
SCCS013B – MAY 1994 – REVISED OCTOBER 2001
CY54FCT138T . . . D PACKAGE
CY74FCT138T . . . Q OR SO PACKAGE
(TOP VIEW)
A0
A1
A2
E1
E2
E3
O7
GND
1
2
3
4
5
6
7
8
16 VCC
15 O0
14 O1
13 O2
12 O3
11 O4
10 O5
9 O6
CY54FCT138T . . . L PACKAGE
(TOP VIEW)
3 2 1 20 19
A2 4
18 O1
E1 5
17 O2
NC 6
16 NC
E2 7
15 O3
E3 8
14 O4
9 10 11 12 13
description
NC – No internal connection
The ’FCT138T devices are 1-of-8 decoders. These devices accept three binary weighted inputs (A0, A1, A2)
and, when enabled, provide eight mutually exclusive active-low outputs (O0–O7). The ’FCT138T devices
feature three enable inputs: two active low (E1, E2) and one active high (E3).
All outputs are high unless E1 and E2 are low and E3 is high. This multiple-enable function allows easy parallel
expansion of the device to a 1-of-32 (five lines to 32 lines) decoder with just four ’FCT138T devices and one
inverter.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the
outputs, preventing damaging current backflow through the device when it is powered down.
PIN DESCRIPTION
NAME
DESCRIPTION
A Address inputs
E1, E2
E3
O
Enable inputs (active low)
Enable input (active high)
Outputs
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
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
1



CY54FCT138T
CY54FCT138T, CY74FCT138T
1-OF-8 DECODERS
SCCS013B MAY 1994 REVISED OCTOBER 2001
ORDERING INFORMATION
TA
PACKAGE
SPEED
(ns)
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
QSOP Q Tape and reel 5 CY74FCT138CTQCT FT138-3
Tube
5 CY74FCT138CTSOC
SOIC SO
FCT138C
Tape and reel 5 CY74FCT138CTSOCT
40°C to 85°C QSOP Q Tape and reel 5.8 CY74FCT138ATQCT FT138-1
Tube
5.8 CY74FCT138ATSOC
SOIC SO
FCT138A
Tape and reel 5.8 CY74FCT138ATSOCT
QSOP Q Tape and reel 9 CY74FCT138TQCT FT138
LCC L
Tube
6 CY54FCT138CTLMB
55°C to 125°C LCC L
Tube
12 CY54FCT138TLMB
CDIP D Tube
12 CY54FCT138TDMB
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OUTPUTS
E1 E2 E3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7
HXXXXXHHHHHHHH
XHXXXXHHHHHHHH
XX L XXXHHHHHHHH
L LHL L L LHHHHHHH
L LHHL LHLHHHHHH
L LHLHLHHLHHHHH
L LHHHLHHHLHHHH
L LHL LHHHHHLHHH
L LHHLHHHHHHLHH
L LHLHHHHHHHHLH
L LHHHHHHHHHHHL
H = High logic level, L = Low logic level, X = Dont care
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265





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