IS43R16800C-5TL Equivalent & Substitute Parts

Part Overview

The IS43R16800C-5TL is a 128Mbit SDRAM DDR memory IC manufactured by ISSI (Integrated Silicon Solution Inc.) in a 66-TSOP II package. This part operates at 200 MHz with 700 ps access time and is designed for parallel memory applications requiring 8M x 16 organization. The device is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing system support and new designs.

Key Parameters

Parameter	Value
Memory Size	128Mbit
Memory Organization	8M x 16
Technology	SDRAM - DDR
Clock Frequency	200 MHz
Access Time	700 ps
Write Cycle Time	15ns
Voltage Supply	2.3V ~ 2.7V
Operating Temperature	0°C ~ 70°C
Package	66-TSSOP (0.400", 10.16mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across the following critical specifications:

Core Compatibility Parameters:

Memory Size: 128Mbit (fixed requirement)
Memory Organization: 8M x 16 (fixed requirement)
Technology: SDRAM - DDR (fixed requirement)
Package: 66-TSSOP II (fixed requirement)
Voltage Supply: 2.3V ~ 2.7V (fixed requirement)
Memory Interface: Parallel (fixed requirement)

Performance Parameters (allow variation within functional limits):

Clock Frequency: 200 MHz or 166 MHz
Access Time: 700 ps or 50 ns
Write Cycle Time: 15ns or 12ns
Operating Temperature: 0°C ~ 70°C or -40°C ~ 85°C

Substitutes are grouped into three categories:

MFR Recommended (Direct Replacements): Active parts from ISSI with identical base product number (IS43R16800) and matching core parameters. These include IS43R16800E-5TLI, IS43R16800E-6TL, and IS43R16800E-6TLI.
Parametric Equivalents: Active parts with identical electrical performance specifications. IS43R16800E-5TL matches the original 200 MHz / 700 ps performance. AS4C8M16D1A-5TCN from Alliance Memory matches 200 MHz / 700 ps specifications.
Cross-Manufacturer Alternatives: Parts from Winbond Electronics (W9412G6KH series) and Alliance Memory (AS4C8M16D1A-5TIN) that maintain core compatibility with variations in access time (50 ns vs. 700 ps) and operating temperature ranges.

Parameter Comparison

Part Number	Manufacturer	Status	Clock Freq (MHz)	Access Time	Write Cycle	Temp Range	Package	Inventory
IS43R16800C-5TL	ISSI	Obsolete	200	700 ps	15ns	0°C ~ 70°C	66-TSOP II	860 Pcs
IS43R16800E-5TLI	ISSI	Active	200	700 ps	15ns	-40°C ~ 85°C	66-TSOP II	3738 Pcs
IS43R16800E-6TL	ISSI	Active	166	700 ps	12ns	0°C ~ 70°C	66-TSOP II	1431 Pcs
IS43R16800E-6TLI	ISSI	Active	166	700 ps	12ns	-40°C ~ 85°C	66-TSOP II	3807 Pcs
IS43R16800E-5TL	ISSI	Active	200	700 ps	15ns	0°C ~ 70°C	66-TSOP II	1664 Pcs
AS4C8M16D1A-5TIN	Alliance Memory	Active	200	700 ps	15ns	-40°C ~ 85°C	66-TSOP II	885 Pcs
AS4C8M16D1A-5TCN	Alliance Memory	Active	200	700 ps	15ns	0°C ~ 70°C	66-TSOP II	4346 Pcs
W9412G6KH-5	Winbond Electronics	Active	200	50 ns	15ns	0°C ~ 70°C	66-TSOP II	2932 Pcs
W9412G6KH-5 TR	Winbond Electronics	Active	200	50 ns	15ns	0°C ~ 70°C	66-TSOP II	736 Pcs
W9412G6KH-5I	Winbond Electronics	Active	200	50 ns	15ns	-40°C ~ 85°C	66-TSOP II	1474 Pcs
W9412G6KH-5I TR	Winbond Electronics	Active	200	50 ns	15ns	-40°C ~ 85°C	66-TSOP II	902 Pcs

Engineering Selection Recommendations

Primary Selection (Direct Replacement): IS43R16800E-5TLI is the recommended primary substitute. It maintains identical electrical performance (200 MHz, 700 ps access time, 15ns write cycle) while extending the operating temperature range to -40°C ~ 85°C. Active product status with 3738 units in stock ensures supply continuity. ROHS3 compliance and MSL 3 rating match the original specification.

Secondary Selection (Same Manufacturer, Extended Temperature): IS43R16800E-6TLI provides extended temperature operation (-40°C ~ 85°C) with reduced clock frequency (166 MHz) and write cycle time (12ns). This part is suitable for applications where the lower frequency is acceptable and extended temperature range is required. Highest inventory availability at 3807 units.

Cross-Manufacturer Alternative (Performance Equivalent): AS4C8M16D1A-5TIN from Alliance Memory matches the original 200 MHz / 700 ps performance with extended temperature range (-40°C ~ 85°C). ROHS3 compliance and MSL 3 rating are maintained. This option provides supply diversification from a different manufacturer.

High-Speed Alternative (Faster Access Time): W9412G6KH-5I from Winbond Electronics operates at 200 MHz with improved 50 ns access time (versus 700 ps) and extended temperature range (-40°C ~ 85°C). This part is suitable for applications where faster access time provides performance benefit. Available in both Tray and Tape & Reel packaging.

All recommended substitutes maintain ROHS3 compliance, MSL 3 rating, and 66-TSOP II package compatibility. Selection should be based on specific application requirements for operating temperature range, access time performance, and packaging format.

Frequently Asked Questions (FAQ)

Q: Can IS43R16800E-5TLI directly replace IS43R16800C-5TL? A: Yes. Both parts operate at 200 MHz with 700 ps access time and 15ns write cycle time in the 66-TSOP II package. The primary difference is that IS43R16800E-5TLI is active (versus obsolete) and supports extended temperature operation (-40°C ~ 85°C versus 0°C ~ 70°C). If your application operates within 0°C ~ 70°C, both parts are functionally equivalent.

Q: What is the difference between IS43R16800E-6TL and IS43R16800E-6TLI? A: Both parts operate at 166 MHz with identical access time (700 ps) and write cycle time (12ns). The difference is operating temperature range: IS43R16800E-6TL supports 0°C ~ 70°C, while IS43R16800E-6TLI supports -40°C ~ 85°C. Select based on your application's temperature requirements.

Q: Why do Winbond W9412G6KH parts show 50 ns access time instead of 700 ps? A: Access time specifications use different measurement standards. The 50 ns specification for Winbond parts represents a different timing parameter than the 700 ps specification for ISSI and Alliance Memory parts. Both meet the core functional requirements for 128Mbit DDR SDRAM operation at 200 MHz. Verify timing compatibility with your specific application requirements.

Q: What is the difference between Tray and Tape & Reel (TR) packaging? A: Both packaging formats contain identical components. Tray packaging is used for manual handling and smaller quantities. Tape & Reel packaging is used for automated assembly processes and larger production runs. Select based on your manufacturing process requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All parts listed maintain ROHS3 compliance and MSL 3 (168 Hours) rating, matching the original IS43R16800C-5TL specification.

Q: Can I use AS4C8M16D1A-5TCN in place of AS4C8M16D1A-5TIN? A: Both parts are from Alliance Memory with identical electrical performance (200 MHz, 700 ps access time, 15ns write cycle). The difference is operating temperature: AS4C8M16D1A-5TCN supports 0°C ~ 70°C, while AS4C8M16D1A-5TIN supports -40°C ~ 85°C. Select based on your application's temperature requirements.

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