Toshiba TMM416D-4 4116-4 16Kx1 250ns DRAM Ceramic DIP-16 NOS Vintage IC

ITEM SPECIFICS
Brand: Toshiba
Model: TMM416D-4
MPN: TMM416D-4
Alternate Marking: 4116-4
Type: Dynamic RAM Integrated Circuit
Memory Type: Page-Mode DRAM
Memory Organization: 16K x 1 Bit
Memory Density: 16 Kbit
Access Time: 250 ns
Technology: MOS
Output Type: Three-State
Refresh Cycles: 128
Package Type: Ceramic DIP / CDIP
Number of Pins: 16
Mounting Style: Through-Hole
Terminal Pitch: 2.54 mm
Operating Temperature Range: 0°C to 70°C
Temperature Grade: Commercial
Country/Region of Manufacture: Japan
Product Status: Discontinued
Condition: New Old Stock

DESCRIPTION
Toshiba TMM416D-4, also marked 4116-4, discontinued 16K × 1-bit dynamic RAM integrated circuit. This vintage memory IC provides page-mode operation and a maximum access time of 250 ns.
The component uses a 16-pin ceramic dual-inline through-hole package. It is intended for legacy electronic equipment, vintage computer restoration, circuit-board repair, and applications requiring the exact TMM416D-4 part number and speed grade.

Features:
Toshiba TMM416D-4
Alternate 4116-4 Marking
16,384 x 1-Bit Organization
16 Kbit Memory Capacity
250 ns Maximum Access Time
Page-Mode DRAM
MOS Technology
Three-State Output
128 Refresh Cycles
16-Pin Ceramic DIP Package
Through-Hole Mounting
Commercial Temperature Grade
Discontinued Vintage Memory IC
Made in Japan

This component is new old stock and may show cosmetic marks, terminal discoloration, or other evidence of long-term storage and handling. Functional testing has not been represented. Please review all photographs for the exact condition, markings, and item included.
Confirm the exact part number, speed grade, pin configuration, timing, refresh requirements, and electrical requirements of the original equipment before installation.

DISCLAIMER
This item is new old stock and has been stored for an extended period. It may show cosmetic marks, terminal discoloration, or other evidence of storage and handling. Functional testing has not been represented. Please review all photos for the exact condition and markings. Ships fast with tracking. 30-day returns accepted; buyer pays return shipping.

LEGAL DISCLAIMER
We are not an authorized distributor, reseller, or representative of Toshiba. All product names, trademarks, brands, and logos are the property of their respective owners. This discontinued component was sourced from existing inventory and is not covered by the original manufacturer’s warranty.

COMPATIBILITY & CROSS-REFERENCE
Toshiba's MOS Memory data book lists the TMM416 as an alternate source for the Mostek MK4116 — the industry-standard 4116 16K x 1 dynamic RAM. The D denotes the ceramic (Cerdip) package and the -4 suffix the 250 ns speed grade; this unit carries the alternate 4116-4 marking. Other published 4116-family cross-references include the TMS4116 (Texas Instruments), MCM4116 (Motorola), μPD416 (NEC), AM9016 (AMD), and MB8116 (Fujitsu). The TMM416 requires +12V, +5V, and −5V supplies — always confirm speed grade, supply voltages, and timing against your equipment before substituting.

Q&A
Q: What is the Toshiba TMM416D-4? A: A 16,384 x 1-bit NMOS dynamic RAM with a 250 ns maximum access time in a 16-pin ceramic DIP.
Q: Is the TMM416D-4 a 4116 equivalent? A: Yes — Toshiba lists the TMM416 as an alternate source for the Mostek MK4116, and this unit is marked 4116-4 (250 ns grade).
Q: What supply voltages does it require? A: +12V, +5V, and −5V, like other 4116-family 16K DRAMs.

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