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부품번호 | FSTD32450GX 기능 |
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기능 | Configurable 4-Bit to 40-Bit Bus Switch with Selectable Level Shifting (Preliminary) | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
Preliminary
February 2001
Revised August 2001
FSTD32450
Configurable 4-Bit to 40-Bit Bus Switch with
Selectable Level Shifting (Preliminary)
General Description
The Fairchild Universal Bus Switch FSTD32450 provides
4-bit, 5-bit, 8-bit, 10-bit, 16-bit, 20-bit...40-bit of high-speed
CMOS TTL-compatible bus switching. The low On Resis-
tance of the switch allows inputs to be connected to out-
puts without adding propagation delay or generating
additional ground bounce noise.
The FSTD32450 is designed to allow “customer” configura-
tion control of the enable connections. The device can be
organized as either a ten 4-bit, eight 5-bit, four 10-bit, two
20-bit or one 40-bit enabled bus switch. Also achievable
are 8-bit and 16-bit enabled configurations (see Functional
Description). The device’s bit configuration is controlled
through select pin logic. (see Truth Table). When OEx is
LOW, Port Ax is connected to Port Bx. When OEx is HIGH,
the switch is OPEN.
Another key device feature is the addition of a level shifting
select pin, “S2 and S5”. When S2 and S5 are LOW, the
device behaves as a standard N-MOS switch. When S2
and S5 are HIGH, a diode to VCC is integrated into the cir-
cuit allowing for level shifting between 5V inputs and 3.3V
outputs.
Features
s Voltage level shifting
s 4Ω switch connection between two ports
s Minimal propagation delay through the switch
s Low lCC
s Zero bounce in flow-through mode
s Control inputs compatible with TTL level
s Packaged in plastic Fine-Pitch Ball Grid Array
(FBGA) (Preliminary)
Applications Note
Select pins S0, S1, S2, S3, S4 and S5 are intended to be
used as static user configurable control pins. The AC per-
formance of these pins has not been characterized or
tested. Switching of these select pins during system opera-
tion may temporarily disrupt output logic states and/or
enable pin controls.
40-bit configuration can be achieved by connecting the
OE1 and the OE6 pins to together.
Ordering Code:
Order Number Package Number
Package Description
FSTD32450GX
(Note 1)
BGA114A
(Preliminary)
114-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
[Tape and Reel]
Note 1: BGA package available in Tape and Reel only.
UHC is a trademark of Fairchild Semiconductor Corporation.
© 2001 Fairchild Semiconductor Corporation DS500563
www.fairchildsemi.com
Preliminary
5-Bit Configuration
www.fairchildsemi.com
4-Bit Configuration
4
4페이지 Preliminary
Truth Tables (Continued)
4-Bit Configuration (S0 = S1 = H)
Inputs
OE1 OE2 OE3 OE4 OE5
LLLLL
L L L LH
L L LHL
L L LHH
L LHL L
L LHLH
L LHHL
L LHHH
LHL L L
LHLLH
LHLHL
LH LHH
LHHL L
L HH L H
L HHH L
L HHHH
HL L L L
HL L LH
HL LHL
H L LHH
HLHL L
HLHLH
H L HH L
H LHHH
HHL L L
HHL LH
HH L H L
HH LHH
HHHL L
HHH L H
HHHHL
HHHHH
1A1-4, 1B1-4
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Inputs/Outputs
1A5-8, 1B5-8
2A3-6, 2B3-6
2A7-10, 2B7-10
1A9-10, 2B9-10
2A1-2, 2B1-2
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
Z
Z
Z
Z
Z
Z
Z
Z
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
Z
Z
Z
Z
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
Z
Z
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
Z
Z
Z
Z
Z
Z
Z
Z
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
Z
Z
Z
Z
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
Z
Z
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
7 www.fairchildsemi.com
7페이지 | |||
구 성 | 총 13 페이지수 | ||
다운로드 | [ FSTD32450GX.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
FSTD32450GX | Configurable 4-Bit to 40-Bit Bus Switch with Selectable Level Shifting (Preliminary) | Fairchild Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |