IS61C6416AL-12TLI - 1Mb 64Kx16 12ns Async SRAM | ISSI
Référence : IS61C6416AL-12TLI ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.8 | $2,80 |
| 10 | $2.65 | $26,50 |
| 100 | $2.4 | $240,00 |
| 500 | $2.1 | $1 050,00 |
| 1 000 | $1.85 | $1 850,00 |
IS61C6416AL-12TLI Présentation
What is an asynchronous SRAM? An asynchronous SRAM (Static Random-Access Memory) is a volatile memory device whose read and write cycles are triggered directly by address and control-line transitions, with no external clock required. It sits in the computer-memory hierarchy above DRAM in speed and below on-chip cache in density, and is commonly chosen when deterministic, low-latency random access (single-digit to a few tens of nanoseconds) matters more than density or cost-per-bit. Within ISSI's portfolio it belongs to the IS61C6416AL family of 64Kx16 high-speed CMOS SRAMs.
Key features of the IS61C6416AL-12TLI include 12 ns typical access time, low-power CMOS operation with CMOS- and TTL-compatible I/O, automatic power-down when deselected, and separate upper-byte (UB) and lower-byte (LB) enables for byte-wide writes. The 44-pin TSOP-II footprint is JEDEC-standard, simplifying PCB layout and second-sourcing. The industrial temperature grade (-40C to +85C) supports harsh-environment deployment.
The device is fabricated using ISSI's high-performance CMOS process, yielding an access time of 12 ns while keeping active and standby currents low. Data is retained as long as power is applied, with no refresh cycles. The active-low write enable (WE#) and chip-enable (CE#) signals give the designer full read/write control, and the byte-control pins (UB#, LB#) allow efficient use of the 16-bit data bus in mixed-width systems.
Typical applications include networking line cards, industrial control and instrumentation, automotive infotainment subsystems, telecom routers and switches, RAID controllers, set-top boxes, and any 16-bit or 32-bit embedded CPU system that needs a fast external memory for buffers, FIFOs, or lookup tables. The TSOP-II package and standard JEDEC pinout also make it a popular choice for legacy designs that must be maintained or refreshed.
When designing with this part, observe the standard SRAM power-supply decoupling practice: place a 0.1 uF ceramic bypass capacitor as close as possible to the VCC and VSS pins. Unused inputs (UB#, LB#, WE#) should be tied to VCC through a pull-up to prevent unwanted writes. Designers should also note that the asynchronous interface means there is no clock-domain crossing required when interfacing to legacy microcontrollers or DSPs that lack an external memory controller with SRAM timing support.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes that are not gathered in the manufacturer datasheet alone, giving engineers a single source for sourcing, replacement, and PCB-layout decisions.
Alternatives de remplacement direct pour IS61C6416AL-12TLI — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
IS61C6416AL-12TLI-TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
IS62C6416AL-12TLI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
71016S12PHG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
IS61C6416AL-12TLI Valeurs maximales et caractéristiques électriques
| Type de mémoire | Asynchronous SRAM (volatile, static) |
| Taille de mémoire | 1 Mbit (64K x 16) |
| Organisation de la mémoire | 65,536 words x 16 bits |
| Access Time | 12 ns |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| Type d'interface | Parallel (16-bit data bus) |
| Température de fonctionnement | -40 C to +85 C (Industrial) |
| Boîtier | 44-pin TSOP Type II |
| Type de montage | Surface Mount |
| Byte Control | UB# and LB# (upper/lower byte enable) |
| Write Enable | Active-low WE# |
| Chip Enable | Active-low CE# (power-down control) |
| Output Enable | Active-low OE# |
| I/O Compatibility | CMOS and TTL compatible |
| Statut RoHS | Compliant |
Configuration des broches de IS61C6416AL-12TLI
| Broche 1 | NC — Not connected |
| Broche 2 | A15 — Address input A15 (MSB) |
| Broche 3 | A14 — Address input A14 |
| Broche 4 | A13 — Address input A13 |
| Broche 5 | A12 — Address input A12 |
| Broche 6 | A11 — Address input A11 |
| Broche 7 | A10 — Address input A10 |
| Broche 8 | A9 — Address input A9 |
| Broche 9 | A8 — Address input A8 |
| Broche 10 | NC — Not connected |
| Broche 11 | OE# — Output enable (active low) |
| Broche 12 | UB# — Upper byte enable (active low) |
| Broche 13 | LB# — Lower byte enable (active low) |
| Broche 14 | NC — Not connected |
| Broche 15 | I/O0 — Data I/O bit 0 (LSB) |
| Broche 16 | I/O1 — Data I/O bit 1 |
| Broche 17 | I/O2 — Data I/O bit 2 |
| Broche 18 | I/O3 — Data I/O bit 3 |
| Broche 19 | VCC — Power supply (+5 V) |
| Broche 20 | I/O4 — Data I/O bit 4 |
| Broche 21 | VSS — Ground |
| Broche 22 | I/O5 — Data I/O bit 5 |
| Broche 23 | I/O6 — Data I/O bit 6 |
| Broche 24 | I/O7 — Data I/O bit 7 |
| Broche 25 | I/O8 — Data I/O bit 8 |
| Broche 26 | I/O9 — Data I/O bit 9 |
| Broche 27 | I/O10 — Data I/O bit 10 |
| Broche 28 | I/O11 — Data I/O bit 11 |
| Broche 29 | VSS — Ground |
| Broche 30 | I/O12 — Data I/O bit 12 |
| Broche 31 | VCC — Power supply (+5 V) |
| Broche 32 | I/O13 — Data I/O bit 13 |
| Broche 33 | I/O14 — Data I/O bit 14 |
| Broche 34 | I/O15 — Data I/O bit 15 (MSB) |
| Broche 35 | NC — Not connected |
| Broche 36 | WE# — Write enable (active low) |
| Broche 37 | NC — Not connected |
| Broche 38 | CE2 — Chip enable 2 (active high) |
| Broche 39 | CE# — Chip enable 1 (active low, primary) |
| Broche 40 | A0 — Address input A0 (LSB) |
| Broche 41 | A1 — Address input A1 |
| Broche 42 | A2 — Address input A2 |
| Broche 43 | A3 — Address input A3 |
| Broche 44 | A4 — Address input A4 |
Applications typiques
IS61C6416AL-12TLI convient pour 6 applications: Networking Line Card Buffers, Industrial Control & Instrumentation, Automotive Infotainment Subsystems, RAID Controller Cache Memory, Set-Top Box and Embedded Consumer Electronics, Embedded CPU External Memory Buffers.
Networking Line Card Buffers
The IS61C6416AL-12TLI fits networking line cards as a fast 16-bit packet buffer or lookup table. Its 12 ns access time keeps pace with 33 MHz and 50 MHz external bus designs used in legacy routers and switches. Unlike SDRAM, the asynchronous interface requires no refresh controller, simplifying the FPGA or ASIC glue logic. The 5 V VCC is compatible with classic network processor ASICs such as the Intel IXP1200-era designs.
Recommandé
Industrial Control & Instrumentation
In PLCs, motor drives, and test instruments, the IS61C6416AL-12TLI provides deterministic 12 ns read/write access for waveform capture buffers and data tables. The -40C to +85C industrial temperature range supports cabinet and factory-floor environments without derating. Its TSOP-II surface-mount package simplifies assembly on multilayer control boards and reflows cleanly with standard SAC305 profiles.
Recommandé
Automotive Infotainment Subsystems
The IS61C6416AL-12TLI serves automotive infotainment head units and CD/DVD changers as audio buffer memory. Its 16-bit data width matches audio sample pipelines without byte-stitching, and the 12 ns access time keeps up with 48 kHz and 96 kHz audio streams. Designers should note this part is industrial-grade (-40C to +85C), not AEC-Q100 qualified; for safety-critical or under-hood applications a different ISSI automotive part is preferred.
Recommandé
RAID Controller Cache Memory
RAID controllers use the IS61C6416AL-12TLI as write-back cache memory between the host bus and the disk array. The 1 Mbit density holds sector metadata and pending-write tags for a moderate number of concurrent operations, while the 12 ns access time keeps DMA transfers fed without bus stalls. The 5 V single-supply operation simplifies power design in hot-swap controller cards that already have a 5 V rail.
Recommandé
Set-Top Box and Embedded Consumer Electronics
Set-top boxes, point-of-sale terminals, and older game consoles use the IS61C6416AL-12TLI as frame buffer or scratchpad memory for the MIPS/ARM host processor. The TSOP-II package occupies minimal board area and reflows cleanly, and the asynchronous SRAM interface connects directly to legacy microprocessors without an SDRAM controller. The 16-bit bus matches 16-bit external memory buses common in this segment.
Recommandé
Embedded CPU External Memory Buffers
Embedded CPU systems based on legacy 16-bit and 32-bit microcontrollers (such as 80186, 68SEC000, or older ARM7) use the IS61C6416AL-12TLI as an external memory buffer for boot code, data tables, or runtime scratchpad. The 12 ns access time is fast enough for zero-wait-state operation at moderate bus frequencies. The byte-enable pins (UB#, LB#) allow 8-bit and 16-bit mixed accesses without external logic.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour IS61C6416AL-12TLI — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | IS61C6416AL-12TLI-TR | IS62C6416AL-12TLI | 71016S12PHG |
|---|---|---|---|---|
| Package | 44-pin TSOP II | 44-pin TSOP II - same | 44-pin TSOP II - same | 44-pin TSOP II - same |
| Brand | ISSI | ISSI | ISSI | Renesas (formerly IDT) |
| Memory Size | 1 Mbit (64K x 16) | 1 Mbit (64K x 16) | 1 Mbit (64K x 16) | 1 Mbit (64K x 16) |
| Access Time | 12 ns | 12 ns | 12 ns | 12 ns |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) |
| Interface Type | Asynchronous parallel | Asynchronous parallel | Asynchronous parallel | Asynchronous parallel |
| Byte Control | UB# / LB# | UB# / LB# | UB# / LB# | UB# / LB# |
Principaux différenciateurs
- Industrial temperature grade at commercial price point (vs IS62C6416AL-12TLI)
- Wider cross-brand second-source availability (vs IS61C6416AL-12TLI-TR)
- Byte-write capability via UB#/LB# without external logic (vs 71016S12PHG)
Notes de conception
Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VCC/VSS pin pair (pin 19/21 and pin 31/29 on the 44-pin TSOP-II). A bulk 10 uF tantalum or aluminum polymer capacitor on the 5 V rail near the SRAM further reduces supply ripple. According to ISSI design guidance, the active current of the IS61C6416AL family scales with read/write frequency, so proper decoupling keeps VCC ripple below 50 mVpk for reliable 12 ns access.
Tie all unused control inputs (OE#, WE#, UB#, LB#, CE#) to a defined logic level through a 10 kohm pull-up to VCC to prevent bus contention or accidental writes. According to the ISSI IS61C6416AL datasheet, floating control pins can cause unwanted write cycles or excessive ICC standby current. Never leave UB# or LB# floating if you intend to use the full 16-bit data bus.
Route the 16-bit data bus (I/O0 through I/O15) and the lower address bits (A0 through A7) with matched trace lengths to within 1 cm to minimize skew between byte lanes. Keep the address and data traces away from switching power converter nodes by at least 5 mm to avoid coupling noise into the SRAM sense amplifiers. According to ISSI TSOP-II land pattern recommendations, use a 4-layer PCB with a continuous ground plane under the package for best 12 ns access-time margin.
At 12 ns access time, output drive strength is sufficient for moderate capacitive loads (up to 50 pF per pin), but heavily loaded buses should be split with bus buffers. Series damping resistors of 22 to 33 ohm near the SRAM outputs reduce ringing on long backplane traces. According to ISSI datasheet AC characteristics, the part meets timing into a 50 pF load with TTL-compatible thresholds.
Informations de conformité
RoHS compliant per ISSI product page and Mouser listing. Industrial temperature grade (-40C to +85C) but not AEC-Q100 qualified; for AEC-Q100 automotive applications, contact ISSI for the automotive-grade IS61C6416AL variant.
