Description
Cirrus Logic CL-MD3450D-SC-B 16-Bit ISA Modem Card 68996-833EJ PnP
The Cirrus Logic CL-MD3450D-SC-B is a 16-bit ISA internal modem card built around Cirrus Logic's own CL-MD3450D-SC-B modem controller chipset. It installs into a standard 16-bit ISA expansion slot and connects to a standard telephone line via RJ-11 jacks, providing dial-up modem functionality for desktop PCs equipped with ISA slots. The card also includes a small onboard speaker for modem audio tones.
Specifications & What's Included
- Manufacturer: Cirrus Logic
- Model / MPN: CL-MD3450D-SC-B
- Secondary part number: 68996-833EJ
- Date code: 9625 (week 25 of 1996)
- Bus interface: 16-bit ISA
- Form factor: half-length ISA expansion card
- Main chipset: Cirrus Logic CL-MD3450D-SC-B (USA-H revision, clearly marked on primary IC)
- Additional ICs: Texas Instruments controller IC visible on PCB; secondary Cirrus Logic chip also present
- Connectors: 2 × RJ-11 — one for telephone line in, one for phone pass-through
- Onboard speaker: yes
- Plug and Play (PnP): yes
- FCC certification: marked on PCB reverse — tested for home or office use
- Card only — no driver disk or documentation included
Applications
The CL-MD3450D-SC-B is a mid-1990s dial-up modem card from the era when ISA slots were the dominant PC expansion bus and dial-up telephone-line modems were the primary way home and small-business computers connected to online services and the early internet. Cirrus Logic was a well-known modem chipset supplier during this period, producing controllers used by many card manufacturers. Cards of this type were used with DOS, Windows 3.x, Windows 95, and Windows 98 systems to connect to bulletin board systems (BBS), CompuServe, AOL, and early ISP dial-up internet services. Today these cards are sought primarily by vintage PC collectors and restorers working on period-correct 486 and early Pentium builds, as well as by enthusiasts maintaining legacy systems that require an ISA modem for software compatibility or historical accuracy.
This Cirrus Logic CL-MD3450D-SC-B 16-bit ISA modem card has been inspected and appears to be in good condition. The PCB is clean with no visible damage, broken traces, or missing components. Contacts on the ISA edge connector look intact. The card shows light shelf wear consistent with storage. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Cirrus Logic |
Model: |
CL-MD3450D-SC-B |
MPN: |
CL-MD3450D-SC-B |
Secondary Model: |
68996-833EJ |
SKU: |
32435 |
Type: |
Internal Modem Card |
Bus Type: |
16-Bit ISA |
Form Factor: |
Half-Length ISA Card |
Chipset: |
Cirrus Logic CL-MD3450D-SC-B |
Interface: |
16-Bit ISA |
Connector Type: |
RJ-11 (Line + Phone) |
Number of Ports: |
2 x RJ-11 (Line In, Phone Out) |
Speaker: |
Yes — onboard |
Plug and Play: |
Yes (PnP) |
Compatible With: |
ISA-equipped PCs, DOS, Windows 3.x, Windows 95/98 |
Condition: |
Used – Inspected and in Good Condition |
Seller Notes: |
Card only; no driver disk or documentation included. |
Country/Region of Manufacture: |
USA |
Condition Notes: |
Cirrus Logic CL-MD3450D-SC-B 16-bit ISA modem card inspected and in good condition. PCB is clean, no visible damage. ISA edge connector contacts intact. Light shelf wear only. |
