1
1999 Integrated Device Technology, Inc.
AUGUST 1999
D S C - 3 7 6 1 / -
BLOCK DIAGRAM
FEATURES:
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Complete 155Mbps PCI-bus ATM Network Interface Card
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Supports 33MHz, 32-bit PCI bus
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155Mbps Multimode fiber optical interface (7M924 / 7M944)
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155Mbps UTP-5 PHY interface (7M925 / 7M945)
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7M924 / 7M925 supports 4K virtual channels (VC's).
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7M944 / 7M945 supports 16K VC's.
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E
2
PROM layout for Sub-vendor ID
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Small Form Factor: 2.5 x 6 inches
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"SARWIN 2" software evaluation program available for
Windows 95TM and Windows 98TM
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Third party software drivers are available for Windows and
VxWorks. Contact your local IDT Sales representative for
details.
DESCRIPTION:
The IDT7M924/25 provides reliable, high performance Asynchro-
nous Transfer Mode connectivity for PCI Card Edge based systems. The
IDT7M924 and IDT7M944 provides an optical fiber media interface; the
IDT7M925 and IDT7M945 supports Unshielded Twisted Pair, Category
5 (UTP-5) cabling. All cards feature complete PCI-bus ATM NIC
functionality, plugging directly into PCI bus expansion slots.
The board is designed for use in any PCI based system. The
IDT7M924 / 25 / 44 / 45 supports the 32 bit, 33 MHz, 5V PCI specification.
155Mbps ATM Network Interface
Card (NIC) in PCI Card Edge Form
Factor
PRELIMINARY
IDT7M924
IDT7M925
IDT7M944
IDT7M945
The central component of the IDT7M924 / 25 / 44 / 45 is the IDT 77252
ABR NICStARTM Segmentation And Reassembly (SAR) controller. The
IDT77252 ABR SAR connects directly to the PCI bus, a private SRAM/
EPROM bus, and the Utopia PHY interface. The PHY device connects
to an AMP 269039-1 optical data link (ODL) device for the fiber optic
connection (IDT7M924 / 44), or to a Pulse Engineering PE-68532
transciever for the UTP-5 connection (IDT7M925 / 45). The ODL
incorporates its own fiber optic connectors; the UTP option includes a line
interface / filter transformer and a standard RJ-45 jack.
OVERVIEW:
5V 33-M H z 32-bit P C I B us
R J-45
C onnector
and
M agnetics
A TM 155
P HY
ID T 77252
A B R S A R
LO C A L
S RA M
80 M H z
O scillator
3761 drw 01
E
2
P RO M
19.44 M H z
O scillator
O ptical D ata
Link (O DL)
Fiber Interface)
7M 924 / 7M 94 4 only
7M 925 / 7M 945 only
2
IDT7M924/7M925/7M944/7M945
155Mbps ATM Network Interface Card (NIC) in PCI Card Edge Form Factor
Ordering Information
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-5166
408-988-5647
Santa Clara, CA 95054
fax: 408-492-8547
ssdhelp@idt.com
www.idt.com
Board Diagram
P ackage
ID T
X XX X X
Device Type
X X
P ower
X XX
S peed
X
C
P rocess/
Tem p. Range
B lank
B lank
7M 924
7M 925
7M 944
7M 945
155M bps A TM Network Interface C ard
(N IC ), OD L Connector, 4K VC
155M bps A TM Network Interface C ard
(N IC ), UTP 5 Connector, 4K VC
155M bps A TM Network Interface C ard
(N IC ), OD L Connector, 16K VC
155M bps A TM Network Interface C ard
(N IC ), UTP 5 Connector, 16K VC
Com m ercial
37 61 d rw 0 3
S
M
S tandard Configuration
120 Lead 5V PC I Card E dge
ID T
77252
A B R S A R
E
2
P R O M
12 8K
o r
51 2K
x 8
S R A M
80M H z
O sc
A T M
155
P H Y
3761 drw 02
O D L (7M 924 / 7 M 94 4)
o r
R J 45 + M a gn e tics
(7M 9 25 / 7 M 94 5)
19.44 M H z
O sc
LED
6.20
2.45
NO TE: Dim ensions are in inches.
12 8K
o r
51 2K
x 8
S R A M
12 8K
o r
51 2K
x 8
S R A M
12 8K
o r
51 2K
x 8
S R A M
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